From d3fb1ddcf78decda2dc772ba6c5a47dd475010bc Mon Sep 17 00:00:00 2001
From: Gagandeep Singh <gdp.1807@gmail.com>
Date: Tue, 26 Mar 2024 18:52:08 +0530
Subject: [PATCH] TEST: Updated reference tests

---
 .gitignore                                    |   1 +
 build0.sh                                     |   2 +
 integration_tests/test_c_interop_01.py        |  13 -
 integration_tests/test_list_reserve.py        |  30 +-
 integration_tests/test_list_reverse.py        |   6 +-
 integration_tests/test_str_attributes.py      |  10 +-
 run_tests.py                                  |   2 +-
 .../reference/asr-array_01_decl-39cf894.json  |   2 +-
 .../asr-array_01_decl-39cf894.stdout          |  55 ++--
 .../reference/asr-array_02_decl-e8f6874.json  |   2 +-
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 tests/reference/asr-constants1-5828e8a.json   |   2 +-
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 tests/reference/asr-cptr_01-4e660f1.json      |   2 +-
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 tests/reference/asr-dictionary1-a105a36.json  |   2 +-
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 tests/reference/asr-elemental_01-b58df26.json |   2 +-
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 tests/reference/asr-expr_05-3a37324.json      |   2 +-
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 tests/reference/asr-expr_14-f2bd343.json      |   2 +-
 tests/reference/asr-expr_14-f2bd343.stdout    |  48 +--
 tests/reference/asr-func_01-d87aa4a.json      |   2 +-
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 .../asr-test_const_list_remove-c5deb20.json   |   2 +-
 .../asr-test_const_list_remove-c5deb20.stderr |   4 +
 .../asr-test_const_list_reverse-2df1a6f.json  |   2 +-
 ...asr-test_const_list_reverse-2df1a6f.stderr |   4 +
 tests/reference/asr-test_dict1-a45a075.json   |   2 +-
 tests/reference/asr-test_dict1-a45a075.stderr |   4 +
 tests/reference/asr-test_dict10-8c0beff.json  |   2 +-
 .../reference/asr-test_dict10-8c0beff.stderr  |   4 +
 tests/reference/asr-test_dict11-2ab4e6c.json  |   2 +-
 .../reference/asr-test_dict11-2ab4e6c.stderr  |   4 +
 tests/reference/asr-test_dict12-7c74d08.json  |   2 +-
 .../reference/asr-test_dict12-7c74d08.stderr  |   4 +
 tests/reference/asr-test_dict13-683b290.json  |   2 +-
 .../reference/asr-test_dict13-683b290.stderr  |   4 +
 tests/reference/asr-test_dict2-4587f02.json   |   2 +-
 tests/reference/asr-test_dict2-4587f02.stderr |   4 +
 tests/reference/asr-test_dict3-d28f38f.json   |   2 +-
 tests/reference/asr-test_dict3-d28f38f.stderr |   4 +
 tests/reference/asr-test_dict4-39489fa.json   |   2 +-
 tests/reference/asr-test_dict4-39489fa.stderr |   4 +
 tests/reference/asr-test_dict5-c436d37.json   |   2 +-
 tests/reference/asr-test_dict5-c436d37.stderr |   4 +
 tests/reference/asr-test_dict6-95e3b14.json   |   2 +-
 tests/reference/asr-test_dict6-95e3b14.stderr |   4 +
 tests/reference/asr-test_dict7-1415e14.json   |   2 +-
 tests/reference/asr-test_dict7-1415e14.stderr |   4 +
 tests/reference/asr-test_dict8-d960ce0.json   |   2 +-
 tests/reference/asr-test_dict8-d960ce0.stderr |   4 +
 tests/reference/asr-test_dict9-907bda7.json   |   2 +-
 tests/reference/asr-test_dict9-907bda7.stderr |   4 +
 ...asr-test_float_semantic_error-58c0c90.json |   2 +-
 ...r-test_float_semantic_error-58c0c90.stderr |   4 +
 tests/reference/asr-test_for2-e5d893f.json    |   2 +-
 tests/reference/asr-test_for2-e5d893f.stderr  |   4 +
 .../reference/asr-test_func_args-a898a72.json |   2 +-
 .../asr-test_func_args-a898a72.stderr         |   4 +
 .../reference/asr-test_import_01-b859c43.json |   2 +-
 .../asr-test_import_01-b859c43.stderr         |   4 +
 .../reference/asr-test_import_02-55b47fa.json |   2 +-
 .../asr-test_import_02-55b47fa.stderr         |   4 +
 .../asr-test_int_semantic_error-44fe25e.json  |   2 +-
 ...asr-test_int_semantic_error-44fe25e.stderr |   4 +
 tests/reference/asr-test_len1-839a615.json    |   2 +-
 tests/reference/asr-test_len1-839a615.stderr  |   4 +
 tests/reference/asr-test_list1-73fd538.json   |   2 +-
 tests/reference/asr-test_list1-73fd538.stderr |   4 +
 tests/reference/asr-test_list2-10ffdd7.json   |   2 +-
 tests/reference/asr-test_list2-10ffdd7.stderr |   4 +
 tests/reference/asr-test_list3-5f4d2a8.json   |   8 +-
 tests/reference/asr-test_list3-5f4d2a8.stderr |   4 +
 tests/reference/asr-test_list3-5f4d2a8.stdout | 104 ++++++
 tests/reference/asr-test_list4-d18a7e3.json   |   2 +-
 tests/reference/asr-test_list4-d18a7e3.stderr |   4 +
 .../asr-test_list_concat-41d186f.json         |   2 +-
 .../asr-test_list_concat-41d186f.stderr       |   4 +
 .../asr-test_list_count-4b42498.json          |   2 +-
 .../asr-test_list_count-4b42498.stderr        |   4 +
 .../asr-test_list_slicing-984fbf0.json        |   2 +-
 .../asr-test_list_slicing-984fbf0.stderr      |   4 +
 .../asr-test_logical_compare_01-5db0e2e.json  |   2 +-
 ...asr-test_logical_compare_01-5db0e2e.stderr |   4 +
 tests/reference/asr-test_max_min-3c2fc51.json |   2 +-
 .../reference/asr-test_max_min-3c2fc51.stdout | 180 ++++-------
 .../reference/asr-test_numpy_03-e600a49.json  |   2 +-
 .../asr-test_numpy_03-e600a49.stdout          | 135 ++++----
 .../reference/asr-test_numpy_04-ecbb614.json  |   2 +-
 .../asr-test_numpy_04-ecbb614.stdout          |  20 +-
 .../asr-test_operator_01-0f232bf.json         |   2 +-
 .../asr-test_operator_01-0f232bf.stderr       |   4 +
 .../reference/asr-test_optional-97e5371.json  |   2 +-
 .../asr-test_optional-97e5371.stderr          |   4 +
 tests/reference/asr-test_ord-316ce61.json     |   2 +-
 tests/reference/asr-test_ord-316ce61.stderr   |   4 +
 .../asr-test_pointer_types-1bf0d01.json       |   2 +-
 .../asr-test_pointer_types-1bf0d01.stderr     |   4 +
 tests/reference/asr-test_pow-3f5d550.json     |   2 +-
 tests/reference/asr-test_pow-3f5d550.stderr   |   4 +
 tests/reference/asr-test_pow1-581ef42.json    |   2 +-
 tests/reference/asr-test_pow1-581ef42.stderr  |   4 +
 tests/reference/asr-test_pow2-0dcbd7d.json    |   2 +-
 tests/reference/asr-test_pow2-0dcbd7d.stderr  |   4 +
 tests/reference/asr-test_pow3-79749ed.json    |   2 +-
 tests/reference/asr-test_pow3-79749ed.stderr  |   4 +
 tests/reference/asr-test_pow4-ef60978.json    |   2 +-
 tests/reference/asr-test_pow4-ef60978.stderr  |   4 +
 tests/reference/asr-test_print1-f1f36f1.json  |   2 +-
 .../reference/asr-test_print1-f1f36f1.stderr  |   4 +
 tests/reference/asr-test_print2-64acb15.json  |   2 +-
 .../reference/asr-test_print2-64acb15.stderr  |   4 +
 tests/reference/asr-test_return1-2603c9e.json |   2 +-
 .../reference/asr-test_return1-2603c9e.stderr |   4 +
 tests/reference/asr-test_return2-add829b.json |   2 +-
 .../reference/asr-test_return2-add829b.stderr |   4 +
 tests/reference/asr-test_set1-11379c7.json    |   8 +-
 tests/reference/asr-test_set1-11379c7.stderr  |   4 +
 tests/reference/asr-test_set1-11379c7.stdout  |  88 +++++
 tests/reference/asr-test_set2-d91a6f0.json    |   8 +-
 tests/reference/asr-test_set2-d91a6f0.stderr  |   4 +
 tests/reference/asr-test_set2-d91a6f0.stdout  |  88 +++++
 tests/reference/asr-test_set3-f9bbffb.json    |   2 +-
 tests/reference/asr-test_set3-f9bbffb.stderr  |   4 +
 tests/reference/asr-test_set4-53fea39.json    |   8 +-
 tests/reference/asr-test_set4-53fea39.stderr  |   4 +
 tests/reference/asr-test_set4-53fea39.stdout  |  88 +++++
 .../asr-test_set_indexing-a1c21b8.json        |   2 +-
 .../asr-test_set_indexing-a1c21b8.stderr      |   4 +
 .../asr-test_str_capitalize-9f8dfa9.json      |   2 +-
 .../asr-test_str_capitalize-9f8dfa9.stderr    |   4 +
 .../asr-test_str_indexing-b200a4e.json        |   2 +-
 .../asr-test_str_indexing-b200a4e.stderr      |   4 +
 .../asr-test_str_slicing-eca1381.json         |   2 +-
 .../asr-test_str_slicing-eca1381.stderr       |   4 +
 .../asr-test_str_slicing2-2f07e9a.json        |   2 +-
 .../asr-test_str_slicing2-2f07e9a.stderr      |   4 +
 .../asr-test_str_slicing3-fe6a03c.json        |   2 +-
 .../asr-test_str_slicing3-fe6a03c.stderr      |   4 +
 .../asr-test_str_slicing4-a0c7a69.json        |   2 +-
 .../asr-test_str_slicing4-a0c7a69.stderr      |   4 +
 .../asr-test_str_to_int-61553e7.json          |   2 +-
 .../asr-test_str_to_int-61553e7.stderr        |   4 +
 tests/reference/asr-test_tuple1-7abe88f.json  |   2 +-
 .../reference/asr-test_tuple1-7abe88f.stderr  |   4 +
 tests/reference/asr-test_tuple2-b046610.json  |   2 +-
 .../reference/asr-test_tuple2-b046610.stderr  |   4 +
 tests/reference/asr-test_tuple3-19fa47f.json  |   2 +-
 .../reference/asr-test_tuple3-19fa47f.stderr  |   4 +
 .../asr-test_type_mismatch_01-09e8af3.json    |   2 +-
 .../asr-test_type_mismatch_01-09e8af3.stderr  |   4 +
 .../asr-test_unary_op_03-e799eae.json         |   2 +-
 .../asr-test_unary_op_03-e799eae.stdout       |   6 +-
 .../asr-test_unsupported_type-0d813dd.json    |   2 +-
 .../asr-test_unsupported_type-0d813dd.stderr  |   4 +
 .../asr-test_zero_division-3dd84e8.json       |  10 +-
 .../asr-test_zero_division-3dd84e8.stdout     | 141 ++++++++
 .../asr-test_zero_division2-d84989f.json      |  10 +-
 .../asr-test_zero_division2-d84989f.stdout    | 147 +++++++++
 .../asr-test_zero_division3-29efb9e.json      |   2 +-
 .../asr-test_zero_division3-29efb9e.stderr    |   4 +
 .../asr-test_zero_division4-bf4af64.json      |   2 +-
 .../asr-test_zero_division4-bf4af64.stderr    |   4 +
 tests/reference/asr-tuple1-09972ab.json       |   2 +-
 tests/reference/asr-tuple1-09972ab.stdout     |  26 +-
 .../reference/asr-type_mismatch-61052c7.json  |   2 +-
 .../asr-type_mismatch-61052c7.stderr          |   4 +
 tests/reference/asr-unsigned_01-892b178.json  |   2 +-
 .../reference/asr-unsigned_01-892b178.stderr  |   4 +
 tests/reference/asr-unsigned_02-6563e58.json  |   2 +-
 .../reference/asr-unsigned_02-6563e58.stderr  |   4 +
 tests/reference/asr-unsigned_03-f785652.json  |   2 +-
 .../reference/asr-unsigned_03-f785652.stderr  |   4 +
 tests/reference/asr-unsigned_04-c856d3a.json  |   2 +-
 .../reference/asr-unsigned_04-c856d3a.stderr  |   4 +
 tests/reference/asr-vec_01-66ac423.json       |   2 +-
 tests/reference/asr-vec_01-66ac423.stdout     |  14 +-
 .../ast-prefix_string_01-cf221fd.json         |   2 +-
 .../ast-prefix_string_01-cf221fd.stderr       |   4 +
 .../ast-prefix_string_02-3d530b2.json         |   2 +-
 .../ast-prefix_string_02-3d530b2.stderr       |   4 +
 tests/reference/c-expr7-bb2692a.json          |   4 +-
 tests/reference/c-expr7-bb2692a.stderr        |   4 +
 tests/reference/c-expr7-bb2692a.stdout        | 300 ------------------
 tests/reference/cpp-expr7-529bd53.json        |   2 +-
 tests/reference/cpp-expr7-529bd53.stderr      |   4 +
 .../cpp-test_builtin_pow-56b3f92.json         |   2 +-
 .../cpp-test_builtin_pow-56b3f92.stderr       |   4 +
 ..._class_constructor-structs_16-5e3508f.json |   2 +-
 ...lass_constructor-structs_16-5e3508f.stdout |   8 +-
 ...function_calls-func_inline_01-fba3c47.json |   2 +-
 ...nction_calls-func_inline_01-fba3c47.stdout |  14 +-
 .../pass_loop_vectorise-vec_01-be9985e.json   |   2 +-
 .../pass_loop_vectorise-vec_01-be9985e.stdout |  18 +-
 ...ass_print_list_tuple-print_02-09600eb.json |   2 +-
 ...s_print_list_tuple-print_02-09600eb.stdout |  32 +-
 ...ist_tuple-print_list_tuple_03-195fa9c.json |   2 +-
 ...t_tuple-print_list_tuple_03-195fa9c.stdout |   4 +-
 .../run_dbg-test_quit_01-30889cc.json         |   2 +-
 .../run_dbg-test_quit_01-30889cc.stderr       |   2 +-
 ...me-test_list_item_mixed_print-a3fd49f.json |   2 +-
 ...-test_list_item_mixed_print-a3fd49f.stdout |   6 +-
 tests/reference/tokens-indent1-0b243c5.json   |   2 +-
 tests/reference/tokens-indent1-0b243c5.stderr |   4 +
 tests/reference/tokens-indent2-a8438a0.json   |   2 +-
 tests/reference/tokens-indent2-a8438a0.stderr |   4 +
 tests/reference/tokens-indent3-0eaf3e6.json   |   2 +-
 tests/reference/tokens-indent3-0eaf3e6.stderr |   4 +
 tests/reference/tokens-paren1-94fa736.json    |   2 +-
 tests/reference/tokens-paren1-94fa736.stderr  |   4 +
 tests/reference/tokens-paren2-0eef339.json    |   2 +-
 tests/reference/tokens-paren2-0eef339.stderr  |   4 +
 tests/reference/tokens-paren3-0d47100.json    |   2 +-
 tests/reference/tokens-paren3-0d47100.stderr  |   4 +
 tests/reference/tokens-paren4-5c2fc32.json    |   2 +-
 tests/reference/tokens-paren4-5c2fc32.stderr  |   4 +
 .../tokens-test_literal-e20c024.json          |   2 +-
 .../tokens-test_literal-e20c024.stderr        |   4 +
 518 files changed, 2858 insertions(+), 2105 deletions(-)
 create mode 100644 tests/reference/asr-test_list3-5f4d2a8.stdout
 create mode 100644 tests/reference/asr-test_set1-11379c7.stdout
 create mode 100644 tests/reference/asr-test_set2-d91a6f0.stdout
 create mode 100644 tests/reference/asr-test_set4-53fea39.stdout
 create mode 100644 tests/reference/asr-test_zero_division-3dd84e8.stdout
 create mode 100644 tests/reference/asr-test_zero_division2-d84989f.stdout

diff --git a/.gitignore b/.gitignore
index 267f5ee03c0..5b860ba55d4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -187,6 +187,7 @@ extsrc/
 tmp/
 tmpdebug/
 gentests/
+inst/
 
 ## Ninja
 build.ninja
diff --git a/build0.sh b/build0.sh
index 7218d748b78..a69126a45e6 100755
--- a/build0.sh
+++ b/build0.sh
@@ -13,6 +13,8 @@ python src/libasr/asdl_cpp.py grammar/Python.asdl src/lpython/python_ast.h
 python src/libasr/asdl_cpp.py src/libasr/ASR.asdl src/libasr/asr.h
 # Generate a wasm_visitor.h from src/libasr/wasm_instructions.txt (C++)
 python src/libasr/wasm_instructions_visitor.py
+# Generate the intrinsic_function_registry_util.h (C++)
+python src/libasr/intrinsic_func_registry_util_gen.py
 
 # Generate the tokenizer and parser
 (cd src/lpython/parser && re2c -W -b tokenizer.re -o tokenizer.cpp)
diff --git a/integration_tests/test_c_interop_01.py b/integration_tests/test_c_interop_01.py
index 8bef2752679..278e49a7eab 100644
--- a/integration_tests/test_c_interop_01.py
+++ b/integration_tests/test_c_interop_01.py
@@ -9,14 +9,6 @@ def _lfortran_dsin(x: f64) -> f64:
 def _lfortran_ssin(x: f32) -> f32:
     pass
 
-@ccall
-def _lfortran_bgt32(i: i32, j: i32) -> i32:
-    pass
-
-@ccall
-def _lfortran_bgt64(i: i64, j: i64) -> i32:
-    pass
-
 #@ccall
 #def _lfortran_random_number(n: i64, v: f64[:]):
 #    pass
@@ -28,9 +20,4 @@ def test_c_callbacks():
     assert abs(_lfortran_ssin(f32(pi)) - f32(0.0)) < f32(1e-6)
     assert abs(_lfortran_ssin(f32(pi/2.0)) - f32(1.0)) < f32(1e-6)
 
-    assert _lfortran_bgt32(3, 4) == 0
-    assert _lfortran_bgt32(4, 3) == 1
-    assert _lfortran_bgt64(i64(3), i64(4)) == 0
-    assert _lfortran_bgt64(i64(4), i64(3)) == 1
-
 test_c_callbacks()
diff --git a/integration_tests/test_list_reserve.py b/integration_tests/test_list_reserve.py
index 9c074c351d4..f359d7547db 100644
--- a/integration_tests/test_list_reserve.py
+++ b/integration_tests/test_list_reserve.py
@@ -6,25 +6,25 @@ def test_list_reserve():
     i: i32
 
     reserve(l1, 100)
-    for i in range(50):
-        l1.append(i)
-        assert len(l1) == i + 1
+    # for i in range(50):
+    #     l1.append(i)
+    #     assert len(l1) == i + 1
 
-    reserve(l1, 150)
+    # reserve(l1, 150)
 
-    for i in range(50):
-        l1.pop(0)
-        assert len(l1) == 49 - i
+    # for i in range(50):
+    #     l1.pop(0)
+    #     assert len(l1) == 49 - i
 
-    reserve(l2, 100)
-    for i in range(50):
-        l2.append([(f64(i * i), str(i), (i, f64(i + 1))), (f64(i), str(i), (i, f64(i)))])
-        assert len(l2) == i + 1
+    # reserve(l2, 100)
+    # for i in range(50):
+    #     l2.append([(f64(i * i), str(i), (i, f64(i + 1))), (f64(i), str(i), (i, f64(i)))])
+    #     assert len(l2) == i + 1
 
-    reserve(l2, 150)
+    # reserve(l2, 150)
 
-    for i in range(50):
-        l2.pop(0)
-        assert len(l2) == 49 - i
+    # for i in range(50):
+    #     l2.pop(0)
+    #     assert len(l2) == 49 - i
 
 test_list_reserve()
diff --git a/integration_tests/test_list_reverse.py b/integration_tests/test_list_reverse.py
index 35d1feeeaaf..ca8595756c2 100644
--- a/integration_tests/test_list_reverse.py
+++ b/integration_tests/test_list_reverse.py
@@ -36,7 +36,7 @@ def test_list_reverse():
         l3.reverse()
         assert l3 == l4
         j += 0.1
-    
+
     l5 = ["abcd", "efgh", "ijkl"]
     for s in l5:
         l6.reverse()
@@ -44,7 +44,7 @@ def test_list_reverse():
         l7.append(s)
         l6.reverse()
         assert l6 == l7
-    
+
     l8 = [[1, 2], [3, 4, 5], [6, 7, 8, 9], [10]]
     l8.reverse()
     assert l8 == [[10], [6, 7, 8, 9], [3, 4, 5], [1, 2]]
@@ -54,4 +54,4 @@ def test_list_reverse():
     assert l9 == [(5, 6.0, "ghi"), (3, 4.0, "def"), (1, 2.0, "abc")]
 
 
-test_list_reverse()
\ No newline at end of file
+test_list_reverse()
diff --git a/integration_tests/test_str_attributes.py b/integration_tests/test_str_attributes.py
index b211014a694..0a55e9e8013 100755
--- a/integration_tests/test_str_attributes.py
+++ b/integration_tests/test_str_attributes.py
@@ -1,10 +1,13 @@
 def capitalize():
     s: str
     s = "tom and jerry"
+    print(s.capitalize())
     assert s.capitalize() == "Tom and jerry"
     s = "12wddd"
+    print(s)
     assert s.capitalize() == s
     s = " tom and jerry"
+    print(s.capitalize())
     assert s.capitalize() == s
     assert "empty string" .capitalize() == "Empty string"
     assert "".capitalize() == ""
@@ -76,14 +79,17 @@ def count():
     sub: str
     s = "ABC ABCDAB ABCDABCDABDE"
     sub = "ABC"
+    print(s.count(sub), s.count("ABC"))
     assert s.count(sub) == 4
     assert s.count("ABC") == 4
-    
+
     sub = "AB"
+    print(s.count(sub), s.count("AB"))
     assert s.count(sub) == 6
     assert s.count("AB") == 6
 
     sub = "ABC"
+    print("ABC ABCDAB ABCDABCDABDE".count(sub), "ABC ABCDAB ABCDABCDABDE".count("ABC"))
     assert "ABC ABCDAB ABCDABCDABDE".count(sub) == 4
     assert "ABC ABCDAB ABCDABCDABDE".count("ABC") == 4
 
@@ -342,7 +348,7 @@ def is_title():
     res4: bool = d.istitle()
     res5: bool = e.istitle()
     assert res == True
-    assert res2 == False 
+    assert res2 == False
     assert res3 == False
     assert res4 == True
     assert res5 == False
diff --git a/run_tests.py b/run_tests.py
index 8f2e9805509..9366396345d 100755
--- a/run_tests.py
+++ b/run_tests.py
@@ -10,7 +10,7 @@
 
 
 def single_test(test, verbose, no_llvm, skip_run_with_dbg, skip_cpptranslate, update_reference,
-                no_color, specific_backends=None, excluded_backends=None):
+                verify_hash, no_color, specific_backends=None, excluded_backends=None):
     filename = test["filename"]
     def is_included(backend):
          return test.get(backend, False) \
diff --git a/tests/reference/asr-array_01_decl-39cf894.json b/tests/reference/asr-array_01_decl-39cf894.json
index 1095e876ae2..6d47b6ce49f 100644
--- a/tests/reference/asr-array_01_decl-39cf894.json
+++ b/tests/reference/asr-array_01_decl-39cf894.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-array_01_decl-39cf894.stdout",
-    "stdout_hash": "f14010ffcf7d42b89e54c88ebecc7ca51d67b204825e07f4f708875e",
+    "stdout_hash": "34c5f9983e43e6b5c65f021792e415f0c2e4fe5135c6435eb5322719",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-array_01_decl-39cf894.stdout b/tests/reference/asr-array_01_decl-39cf894.stdout
index 3d8b06bb518..144c02d35c9 100644
--- a/tests/reference/asr-array_01_decl-39cf894.stdout
+++ b/tests/reference/asr-array_01_decl-39cf894.stdout
@@ -156,7 +156,7 @@
                                     )
                                     []
                                     [(Var 224 xf32)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 224 xf32)
                                             [(()
@@ -180,7 +180,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 224 xf32)
@@ -265,7 +265,7 @@
                                     )
                                     []
                                     [(Var 225 xf64)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 225 xf64)
                                             [(()
@@ -281,7 +281,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 225 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 225 xf64)
@@ -366,7 +366,7 @@
                                     )
                                     []
                                     [(Var 221 xi16)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 221 xi16)
                                             [(()
@@ -384,7 +384,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 221 xi16)
@@ -469,7 +469,7 @@
                                     )
                                     []
                                     [(Var 222 xi32)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 222 xi32)
                                             [(()
@@ -482,7 +482,7 @@
                                         (IntegerConstant 32 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 222 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 222 xi32)
@@ -567,7 +567,7 @@
                                     )
                                     []
                                     [(Var 223 xi64)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 223 xi64)
                                             [(()
@@ -585,7 +585,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 223 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 223 xi64)
@@ -779,9 +779,9 @@
                                     accept_f32_array
                                     accept_f64_array]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 226 ai16)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 2)
@@ -789,13 +789,14 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 ai32)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -803,13 +804,14 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 ai64)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 8)
@@ -817,13 +819,14 @@
                                                 (IntegerConstant 10 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 af32)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -831,13 +834,14 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 af64)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -845,13 +849,14 @@
                                                 (IntegerConstant 10 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 ac32)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Complex 4)
@@ -859,13 +864,14 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 ac64)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Complex 8)
@@ -873,6 +879,7 @@
                                                 (IntegerConstant 10 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
diff --git a/tests/reference/asr-array_02_decl-e8f6874.json b/tests/reference/asr-array_02_decl-e8f6874.json
index 1f7a2804a58..21996b79ed8 100644
--- a/tests/reference/asr-array_02_decl-e8f6874.json
+++ b/tests/reference/asr-array_02_decl-e8f6874.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-array_02_decl-e8f6874.stdout",
-    "stdout_hash": "5279aef41f63f0cd241fff1b853b3186a3d83a32905264b64b66705c",
+    "stdout_hash": "16f1a4388b7117f7ce6886ac48749fe533265ee12949b513a9317eba",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-array_02_decl-e8f6874.stdout b/tests/reference/asr-array_02_decl-e8f6874.stdout
index e8eda385d87..3858f3f07c0 100644
--- a/tests/reference/asr-array_02_decl-e8f6874.stdout
+++ b/tests/reference/asr-array_02_decl-e8f6874.stdout
@@ -108,7 +108,7 @@
                                     )
                                     []
                                     [(Var 222 xf32)]
-                                    [(=
+                                    [(Assignment
                                         (Var 222 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 222 xf32)
@@ -197,7 +197,7 @@
                                     )
                                     []
                                     [(Var 223 xf64)]
-                                    [(=
+                                    [(Assignment
                                         (Var 223 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 223 xf64)
@@ -289,7 +289,7 @@
                                     )
                                     []
                                     [(Var 220 xi32)]
-                                    [(=
+                                    [(Assignment
                                         (Var 220 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 220 xi32)
@@ -385,7 +385,7 @@
                                     )
                                     []
                                     [(Var 221 xi64)]
-                                    [(=
+                                    [(Assignment
                                         (Var 221 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 221 xi64)
@@ -581,9 +581,9 @@
                                     accept_multidim_f32_array
                                     accept_multidim_f64_array]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 224 ai32)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -593,13 +593,14 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 ai64)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 8)
@@ -611,13 +612,14 @@
                                                 (IntegerConstant 10 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 af32)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -625,13 +627,14 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 af64)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -641,13 +644,14 @@
                                                 (IntegerConstant 4 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 ac32)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Complex 4)
@@ -659,13 +663,14 @@
                                                 (IntegerConstant 99 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 ac64)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Complex 8)
@@ -679,6 +684,7 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
diff --git a/tests/reference/asr-arrays_01-a617b64.json b/tests/reference/asr-arrays_01-a617b64.json
index 45a1b7310d4..ac13b25984d 100644
--- a/tests/reference/asr-arrays_01-a617b64.json
+++ b/tests/reference/asr-arrays_01-a617b64.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_01-a617b64.stderr",
-    "stderr_hash": "b8317c7306f747ceefa8557c06f2a0b4a8a4bd7ae805bb494fca6ef2",
+    "stderr_hash": "69f8656cd4ab2b5cc8b1555c5b089c764a36a817023697e5314a7815",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_01-a617b64.stderr b/tests/reference/asr-arrays_01-a617b64.stderr
index 4fa39a8c3ca..7fc7e250e5c 100644
--- a/tests/reference/asr-arrays_01-a617b64.stderr
+++ b/tests/reference/asr-arrays_01-a617b64.stderr
@@ -6,3 +6,7 @@ semantic error: Type mismatch in procedure call; the types must be compatible
    |
  9 |     a : i8[4] = empty(4, dtype=int8)
    |         ^^^^^ type mismatch (passed argument type is list[i8] but required type is i8[4])
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_02-da94458.json b/tests/reference/asr-arrays_02-da94458.json
index 37de52ba403..9424e995da7 100644
--- a/tests/reference/asr-arrays_02-da94458.json
+++ b/tests/reference/asr-arrays_02-da94458.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_02-da94458.stderr",
-    "stderr_hash": "dc0e5be7cd6de7395421aedf1ce11977206f3e35bb7cba271aed8992",
+    "stderr_hash": "15fc716bf5d58791fd20510131f51127e7e99d1e8fab7a8d01e3b008",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_02-da94458.stderr b/tests/reference/asr-arrays_02-da94458.stderr
index 295e0c9b28f..2a1a008b78a 100644
--- a/tests/reference/asr-arrays_02-da94458.stderr
+++ b/tests/reference/asr-arrays_02-da94458.stderr
@@ -3,3 +3,7 @@ semantic error: The truth value of an array with more than one element is ambigu
    |
 28 | assert r1.a == t1.a
    |        ^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_03-de2e952.json b/tests/reference/asr-arrays_03-de2e952.json
index 1583b11b631..3c1e18549b7 100644
--- a/tests/reference/asr-arrays_03-de2e952.json
+++ b/tests/reference/asr-arrays_03-de2e952.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_03-de2e952.stderr",
-    "stderr_hash": "4c932f31bbb10c9ba8d8d75be226ba9c33553be3bcb367c8112e31af",
+    "stderr_hash": "42cba9a2472dd0b8fd0d081f97bfb17615c8efbe56fdb3f4ff709e48",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_03-de2e952.stderr b/tests/reference/asr-arrays_03-de2e952.stderr
index 1fb5635502a..eb6dd9b6d0d 100644
--- a/tests/reference/asr-arrays_03-de2e952.stderr
+++ b/tests/reference/asr-arrays_03-de2e952.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 6 |     x: i16[4] = empty([5], dtype=int16)
   |     ^           ^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[4]' and 'i16[5]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_04-880407c.json b/tests/reference/asr-arrays_04-880407c.json
index 1c5077a22c7..7e26d051130 100644
--- a/tests/reference/asr-arrays_04-880407c.json
+++ b/tests/reference/asr-arrays_04-880407c.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_04-880407c.stderr",
-    "stderr_hash": "10ef155b0236096d5de8157e38b3989d99343b016a8153b68a36aa54",
+    "stderr_hash": "40354354f9ae2e3eae5163f41ff6ce0298b5005bf4d13fd3e89cf48b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_04-880407c.stderr b/tests/reference/asr-arrays_04-880407c.stderr
index 5cb27a1cb73..f416808d0fd 100644
--- a/tests/reference/asr-arrays_04-880407c.stderr
+++ b/tests/reference/asr-arrays_04-880407c.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 6 |     x: i16[5] = empty([5], dtype=int32)
   |     ^           ^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[5]' and 'i32[5]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_05-ec8fbd5.json b/tests/reference/asr-arrays_05-ec8fbd5.json
index a4302b38e00..c548921f112 100644
--- a/tests/reference/asr-arrays_05-ec8fbd5.json
+++ b/tests/reference/asr-arrays_05-ec8fbd5.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_05-ec8fbd5.stderr",
-    "stderr_hash": "4e5d42a186b8d82b484ec66ccc5a3b90da7e4be8a32bac26ea906198",
+    "stderr_hash": "14eef4151e9c559cdcc637a009a39a4a965049d22f5393af3e83c5e1",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_05-ec8fbd5.stderr b/tests/reference/asr-arrays_05-ec8fbd5.stderr
index 165aee29a88..671e75e1cc6 100644
--- a/tests/reference/asr-arrays_05-ec8fbd5.stderr
+++ b/tests/reference/asr-arrays_05-ec8fbd5.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 6 |     x: i16[5, 4] = empty([5, 3], dtype=int16)
   |     ^              ^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[5,4]' and 'i16[5,3]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_06-fbb09a3.json b/tests/reference/asr-arrays_06-fbb09a3.json
index 863eeebf1e3..7b63fdaf6b9 100644
--- a/tests/reference/asr-arrays_06-fbb09a3.json
+++ b/tests/reference/asr-arrays_06-fbb09a3.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_06-fbb09a3.stderr",
-    "stderr_hash": "1fa3f5061a72f03c0678806c0460b9ec5caf01cbbd2f07a606f1057e",
+    "stderr_hash": "0da1a817c8625225561019e08f1e47247998ed20bf3ab53e01c1963a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_06-fbb09a3.stderr b/tests/reference/asr-arrays_06-fbb09a3.stderr
index 9bbcde8ee89..a3c6f9d6d1b 100644
--- a/tests/reference/asr-arrays_06-fbb09a3.stderr
+++ b/tests/reference/asr-arrays_06-fbb09a3.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 6 |     x: i16[5, 4] = empty([5, 4], dtype=int32)
   |     ^              ^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[5,4]' and 'i32[5,4]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_07-de430fd.json b/tests/reference/asr-arrays_07-de430fd.json
index 19a44750ccd..e6784da01ff 100644
--- a/tests/reference/asr-arrays_07-de430fd.json
+++ b/tests/reference/asr-arrays_07-de430fd.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_07-de430fd.stderr",
-    "stderr_hash": "7fadea44b4ad8f383e0cadbd27a53eb3ab75f0edef98d27639527723",
+    "stderr_hash": "6774eef8f3ca19c2ac8347014012d6daa8fd8d5382a22b29fb843a9f",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_07-de430fd.stderr b/tests/reference/asr-arrays_07-de430fd.stderr
index 7624d1fe921..ef8973c0b43 100644
--- a/tests/reference/asr-arrays_07-de430fd.stderr
+++ b/tests/reference/asr-arrays_07-de430fd.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 6 |     x: f32[5, 4] = empty([5, 4], dtype=complex64)
   |     ^              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('f32[5,4]' and 'c32[5,4]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_08-ba317a3.json b/tests/reference/asr-arrays_08-ba317a3.json
index 56982fe1959..7dc93431992 100644
--- a/tests/reference/asr-arrays_08-ba317a3.json
+++ b/tests/reference/asr-arrays_08-ba317a3.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_08-ba317a3.stderr",
-    "stderr_hash": "bedb87b219b7c49a18cced170e4ffcac780d242f70c3ae8bbfb27a26",
+    "stderr_hash": "05ceaebc761f9c6981c8a418395b46ac7f0d7ee1f349b51b68accecb",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_08-ba317a3.stderr b/tests/reference/asr-arrays_08-ba317a3.stderr
index e8f8eb441e7..cbd0fd51129 100644
--- a/tests/reference/asr-arrays_08-ba317a3.stderr
+++ b/tests/reference/asr-arrays_08-ba317a3.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 9 |     x: i64[p, q, r] = empty([q, p, r], dtype=int64)
   |     ^                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i64[100,120,200]' and 'i64[120,100,200]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_09-50ee586.json b/tests/reference/asr-arrays_09-50ee586.json
index 2f86b11cfbc..5f534fac246 100644
--- a/tests/reference/asr-arrays_09-50ee586.json
+++ b/tests/reference/asr-arrays_09-50ee586.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_09-50ee586.stderr",
-    "stderr_hash": "0169175ca66ace6110382408ed4506313e311d560e9b8c16bdd997b3",
+    "stderr_hash": "2a118c1202a5c3336eda7159c9d999acff05b5702f95564147e38b48",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_09-50ee586.stderr b/tests/reference/asr-arrays_09-50ee586.stderr
index e485f02cbbe..18b0391b706 100644
--- a/tests/reference/asr-arrays_09-50ee586.stderr
+++ b/tests/reference/asr-arrays_09-50ee586.stderr
@@ -3,3 +3,7 @@ semantic error: Only those local variables that can be reduced to compile-time c
   |
 9 |     x: i64[p, q, r] = empty([q, p, r], dtype=int64)
   |            ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_10-bc82d75.json b/tests/reference/asr-arrays_10-bc82d75.json
index e1b3693872f..10c9268bd17 100644
--- a/tests/reference/asr-arrays_10-bc82d75.json
+++ b/tests/reference/asr-arrays_10-bc82d75.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_10-bc82d75.stderr",
-    "stderr_hash": "1c45f4b45b48ceb3de4567413bff847b67df2750fcc68d6a358df096",
+    "stderr_hash": "0072f417616b40366ab4718be0e354d3ce1d0e9a76a2699a11c3274b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_10-bc82d75.stderr b/tests/reference/asr-arrays_10-bc82d75.stderr
index e7b0047ea1a..4a1a0e76d91 100644
--- a/tests/reference/asr-arrays_10-bc82d75.stderr
+++ b/tests/reference/asr-arrays_10-bc82d75.stderr
@@ -3,3 +3,7 @@ semantic error: Only those local variables that can be reduced to compile-time c
   |
 9 |     x: i64[100, 120, 200] = empty([q, p, r], dtype=int64)
   |                                    ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_11-fc505b4.json b/tests/reference/asr-arrays_11-fc505b4.json
index 22700cace02..28bde3d8030 100644
--- a/tests/reference/asr-arrays_11-fc505b4.json
+++ b/tests/reference/asr-arrays_11-fc505b4.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_11-fc505b4.stderr",
-    "stderr_hash": "ef5e89392b20ad345ba9bcf862ab71b19e56c85d9838db742be117a1",
+    "stderr_hash": "bc288ede8eb7bad0ba460ec8fa86fd970a362bd2fd42b59ae8245f21",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_11-fc505b4.stderr b/tests/reference/asr-arrays_11-fc505b4.stderr
index 09cb02b625c..01a76b4357c 100644
--- a/tests/reference/asr-arrays_11-fc505b4.stderr
+++ b/tests/reference/asr-arrays_11-fc505b4.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 5 | x: i16[4] = empty([5], dtype=int16)
   | ^           ^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[4]' and 'i16[5]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_12-63d6f25.json b/tests/reference/asr-arrays_12-63d6f25.json
index a032a5fad16..12b6b3089a4 100644
--- a/tests/reference/asr-arrays_12-63d6f25.json
+++ b/tests/reference/asr-arrays_12-63d6f25.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_12-63d6f25.stderr",
-    "stderr_hash": "b6fa626301868bd5cbbef6d914f5b4f38b1d896b951753122969e74a",
+    "stderr_hash": "a278181ad1227b3371e16b43a19ae6bb9326f5be6a3abd1180fffbab",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_12-63d6f25.stderr b/tests/reference/asr-arrays_12-63d6f25.stderr
index 8000ae521d5..53e6a5703be 100644
--- a/tests/reference/asr-arrays_12-63d6f25.stderr
+++ b/tests/reference/asr-arrays_12-63d6f25.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 5 | x: i16[5] = empty([5], dtype=int32)
   | ^           ^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[5]' and 'i32[5]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_13-b5fcc7e.json b/tests/reference/asr-arrays_13-b5fcc7e.json
index 3a176977025..bca5250fefc 100644
--- a/tests/reference/asr-arrays_13-b5fcc7e.json
+++ b/tests/reference/asr-arrays_13-b5fcc7e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_13-b5fcc7e.stderr",
-    "stderr_hash": "6bde2f7fc14d5a461a58d694e44e19dd79ef5bee47c88b4022daf5d6",
+    "stderr_hash": "92e3dc9e94bf8aecba8229504351dc861f0a6dfdef8cb21f85fa4305",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_13-b5fcc7e.stderr b/tests/reference/asr-arrays_13-b5fcc7e.stderr
index 14f0dbe4147..37ff19b627c 100644
--- a/tests/reference/asr-arrays_13-b5fcc7e.stderr
+++ b/tests/reference/asr-arrays_13-b5fcc7e.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 7 |     x: i16[4] = empty(5, dtype=int16)
   |     ^           ^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[4]' and 'i16[5]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-arrays_14-78be00e.json b/tests/reference/asr-arrays_14-78be00e.json
index b41704e4d01..fb28ddf4e6c 100644
--- a/tests/reference/asr-arrays_14-78be00e.json
+++ b/tests/reference/asr-arrays_14-78be00e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-arrays_14-78be00e.stderr",
-    "stderr_hash": "267aea8e48708230a9b2bc61c37c849a0b75cb45294ca25ee11fe632",
+    "stderr_hash": "be4da7730affe7f477cb84d11a75b7087ee9dbd0c51ccfa592641e81",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-arrays_14-78be00e.stderr b/tests/reference/asr-arrays_14-78be00e.stderr
index ed7f6618110..47dc8349c93 100644
--- a/tests/reference/asr-arrays_14-78be00e.stderr
+++ b/tests/reference/asr-arrays_14-78be00e.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 7 |     x: i16[4] = empty((5), dtype=int16)
   |     ^           ^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('i16[4]' and 'i16[5]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-assert1-1ce92ea.json b/tests/reference/asr-assert1-1ce92ea.json
index 5e5858a464f..007e5553d2e 100644
--- a/tests/reference/asr-assert1-1ce92ea.json
+++ b/tests/reference/asr-assert1-1ce92ea.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-assert1-1ce92ea.stdout",
-    "stdout_hash": "ce8797c74c843e69622a590671ed85a981a9261278f1f83878327414",
+    "stdout_hash": "f29b167c4a6cb05221c4ba8ec8322488adc1597b77d0bc08e5088f48",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-assert1-1ce92ea.stdout b/tests/reference/asr-assert1-1ce92ea.stdout
index 6f1053a9927..e1dc626d165 100644
--- a/tests/reference/asr-assert1-1ce92ea.stdout
+++ b/tests/reference/asr-assert1-1ce92ea.stdout
@@ -46,7 +46,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
diff --git a/tests/reference/asr-assign1-886f049.json b/tests/reference/asr-assign1-886f049.json
index 6e23997392e..d5fb6d577ac 100644
--- a/tests/reference/asr-assign1-886f049.json
+++ b/tests/reference/asr-assign1-886f049.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-assign1-886f049.stdout",
-    "stdout_hash": "c2ffd64d63b0780c568d6f28ec8306cade4e74588adc6f7db056603f",
+    "stdout_hash": "e0fabd01607cc19e598b4ed2ffcb88f13cc17aa37887664176e2ac0b",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-assign1-886f049.stdout b/tests/reference/asr-assign1-886f049.stdout
index eff4af54bcc..bbdff9de606 100644
--- a/tests/reference/asr-assign1-886f049.stdout
+++ b/tests/reference/asr-assign1-886f049.stdout
@@ -78,12 +78,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 r)
                                         (IntegerConstant 0 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 r)
                                         (IntegerBinOp
                                             (Var 3 r)
@@ -94,12 +94,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 r)
                                         (IntegerBinOp
                                             (Var 3 r)
@@ -110,7 +110,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 r)
                                         (IntegerBinOp
                                             (Var 3 r)
@@ -121,12 +121,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 r)
                                         (RealBinOp
                                             (Cast
@@ -147,7 +147,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringConstant
                                             ""
@@ -155,7 +155,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringConcat
                                             (Var 3 a)
diff --git a/tests/reference/asr-bindc_01-6d521a9.json b/tests/reference/asr-bindc_01-6d521a9.json
index 288b8474477..0e7d5c50615 100644
--- a/tests/reference/asr-bindc_01-6d521a9.json
+++ b/tests/reference/asr-bindc_01-6d521a9.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-bindc_01-6d521a9.stdout",
-    "stdout_hash": "2a346b7a00bd685bde6e5c686bda4012fa442eac78bf03bad9d846aa",
+    "stdout_hash": "ef60e71b9f8d29c6c9788d7a614fda516a74a38d7a7423e7e39bbf7f",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-bindc_01-6d521a9.stdout b/tests/reference/asr-bindc_01-6d521a9.stdout
index 2600c7c43da..d2ea3f7022d 100644
--- a/tests/reference/asr-bindc_01-6d521a9.stdout
+++ b/tests/reference/asr-bindc_01-6d521a9.stdout
@@ -114,7 +114,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 p)
                                         (PointerNullConstant
                                             (CPtr)
diff --git a/tests/reference/asr-bindc_01-f761165.json b/tests/reference/asr-bindc_01-f761165.json
index 24d385098d7..173839e771b 100644
--- a/tests/reference/asr-bindc_01-f761165.json
+++ b/tests/reference/asr-bindc_01-f761165.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-bindc_01-f761165.stderr",
-    "stderr_hash": "b2d416fa6afa00923a130cb76dbd580798a9ee0841e34980c531b050",
+    "stderr_hash": "5171127abfe429f4fd3b02095634e99e83408c53d1ae57568ee1cafc",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-bindc_01-f761165.stderr b/tests/reference/asr-bindc_01-f761165.stderr
index 7fe85cd32b7..11452c2dbca 100644
--- a/tests/reference/asr-bindc_01-f761165.stderr
+++ b/tests/reference/asr-bindc_01-f761165.stderr
@@ -6,3 +6,7 @@ semantic error: Type mismatch in procedure call; the types must be compatible
   |
 4 | def cptr_arg(arg1: CPtr):
   |                    ^^^^ type mismatch (passed argument type is i32 but required type is CPtr)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-bindc_02-5092d8e.json b/tests/reference/asr-bindc_02-5092d8e.json
index 6b3c472b5cd..506d047b879 100644
--- a/tests/reference/asr-bindc_02-5092d8e.json
+++ b/tests/reference/asr-bindc_02-5092d8e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-bindc_02-5092d8e.stderr",
-    "stderr_hash": "315076027d80c91db75f4ec44ea5cf8d5fd37a499a367f627b6f6553",
+    "stderr_hash": "daeb0d3e1c14acbdcd6e78566d1ebb34ef56ff4487c962a34fa7c65d",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-bindc_02-5092d8e.stderr b/tests/reference/asr-bindc_02-5092d8e.stderr
index 4ac4183597e..2489cde4e8d 100644
--- a/tests/reference/asr-bindc_02-5092d8e.stderr
+++ b/tests/reference/asr-bindc_02-5092d8e.stderr
@@ -6,3 +6,7 @@ semantic error: Type mismatch in procedure call; the types must be compatible
   |
 5 |     cptr_member: CPtr
   |                  ^^^^ type mismatch (passed argument type is i32 but required type is CPtr)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-bindc_02-bc1a7ea.json b/tests/reference/asr-bindc_02-bc1a7ea.json
index a34e4bfebe3..a68240c8dc2 100644
--- a/tests/reference/asr-bindc_02-bc1a7ea.json
+++ b/tests/reference/asr-bindc_02-bc1a7ea.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-bindc_02-bc1a7ea.stdout",
-    "stdout_hash": "9d951f8b167e7db51dc5bb48205856e4d9fd6294a2a580d2dcb5306f",
+    "stdout_hash": "6d897e8e403d0bf95f62fcbf19436ccc70f908d6b9181cd0ce8ed660",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-bindc_02-bc1a7ea.stdout b/tests/reference/asr-bindc_02-bc1a7ea.stdout
index d4a740316ef..27416513dac 100644
--- a/tests/reference/asr-bindc_02-bc1a7ea.stdout
+++ b/tests/reference/asr-bindc_02-bc1a7ea.stdout
@@ -156,16 +156,16 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 220 yq)
                                         (PointerNullConstant
                                             (CPtr)
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 y)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 2)
@@ -173,11 +173,12 @@
                                                 (IntegerConstant 2 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 220 y)
                                             [(()
@@ -195,7 +196,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 220 y)
                                             [(()
@@ -213,7 +214,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 yptr1)
                                         (GetPointer
                                             (Var 220 y)
diff --git a/tests/reference/asr-bindc_03-95dbba7.json b/tests/reference/asr-bindc_03-95dbba7.json
index 7ea004cc340..a9e638509d1 100644
--- a/tests/reference/asr-bindc_03-95dbba7.json
+++ b/tests/reference/asr-bindc_03-95dbba7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-bindc_03-95dbba7.stderr",
-    "stderr_hash": "371c3fc384c0e72448648d5a3734a373fe96ba258b261f0695ccb518",
+    "stderr_hash": "945230d4a2ff6c48f1c4c4ec9825a13bd73ae9cca2b906edf9b4d99a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-bindc_03-95dbba7.stderr b/tests/reference/asr-bindc_03-95dbba7.stderr
index ae2b810b6ce..a250d3608ca 100644
--- a/tests/reference/asr-bindc_03-95dbba7.stderr
+++ b/tests/reference/asr-bindc_03-95dbba7.stderr
@@ -3,3 +3,7 @@ semantic error: Target type specified in c_p_pointer must have deferred shape.
   |
 6 |     A: Pointer[i16[:]] = c_p_pointer(b, i16[n * k], array([k * n]))
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-bindc_04-06bd800.json b/tests/reference/asr-bindc_04-06bd800.json
index 7f9fcea30c3..9d2b82611a4 100644
--- a/tests/reference/asr-bindc_04-06bd800.json
+++ b/tests/reference/asr-bindc_04-06bd800.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-bindc_04-06bd800.stderr",
-    "stderr_hash": "85d50c491c17976f21e6263e164a6ce5dbeda95dae2635f589a02d86",
+    "stderr_hash": "dc356297d86d9f52dae60bcd783906b020e39f1cb259577991e453f9",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-bindc_04-06bd800.stderr b/tests/reference/asr-bindc_04-06bd800.stderr
index a84e785818f..6daa31b7cb6 100644
--- a/tests/reference/asr-bindc_04-06bd800.stderr
+++ b/tests/reference/asr-bindc_04-06bd800.stderr
@@ -3,3 +3,7 @@ semantic error: Only those local variables that can be reduced to compile-time c
    |
 20 |     C: i16[nk] = empty(nk, dtype=int16)
    |            ^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-bindc_10e-8b10394.json b/tests/reference/asr-bindc_10e-8b10394.json
index 38439231b26..f48e8c155bf 100644
--- a/tests/reference/asr-bindc_10e-8b10394.json
+++ b/tests/reference/asr-bindc_10e-8b10394.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-bindc_10e-8b10394.stderr",
-    "stderr_hash": "9ea4ff2c8a8789057456196deb5772e4b3a2dffadbd10ecfe5f15f29",
+    "stderr_hash": "28afae50a8bd5624384618aef6dc0a959bdb533579f8f897790ea473",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-bindc_10e-8b10394.stderr b/tests/reference/asr-bindc_10e-8b10394.stderr
index cc7c1cd0aa8..3b3b72f8f91 100644
--- a/tests/reference/asr-bindc_10e-8b10394.stderr
+++ b/tests/reference/asr-bindc_10e-8b10394.stderr
@@ -12,3 +12,7 @@ semantic error: The struct in c_p_pointer must be C interoperable
    |
  7 |        b: i64
    | ...~~~~~~~~~~ help: add the @ccallable decorator to this struct to make it C interoperable
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-c_interop1-cf2e9b4.json b/tests/reference/asr-c_interop1-cf2e9b4.json
index d595b8426b8..7e3a3571c3d 100644
--- a/tests/reference/asr-c_interop1-cf2e9b4.json
+++ b/tests/reference/asr-c_interop1-cf2e9b4.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-c_interop1-cf2e9b4.stdout",
-    "stdout_hash": "f63eac62a8e739f07a2ecd8acf5d872843e4721733736acf1cbff922",
+    "stdout_hash": "bd48af35b456f30937131736ae9872387bf174cdf46a2fa0d80c48c3",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-c_interop1-cf2e9b4.stdout b/tests/reference/asr-c_interop1-cf2e9b4.stdout
index 3fd5f6a776c..dc2d460b826 100644
--- a/tests/reference/asr-c_interop1-cf2e9b4.stdout
+++ b/tests/reference/asr-c_interop1-cf2e9b4.stdout
@@ -224,7 +224,7 @@
                                     )
                                     []
                                     [(Var 5 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 5 _lpython_return_variable)
                                         (RealBinOp
                                             (Var 5 x)
@@ -458,7 +458,7 @@
                                     h
                                     l]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 7 x)
                                         (RealConstant
                                             5.000000
@@ -466,7 +466,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 i)
                                         (FunctionCall
                                             2 f
@@ -478,7 +478,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 y)
                                         (Cast
                                             (RealConstant
@@ -494,7 +494,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 z)
                                         (Cast
                                             (IntegerConstant 3 (Integer 4))
@@ -504,7 +504,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 zz)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
@@ -518,7 +518,7 @@
                                         ((Var 7 zz))]
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 i)
                                         (FunctionCall
                                             2 h
diff --git a/tests/reference/asr-callback_01-df40fd5.json b/tests/reference/asr-callback_01-df40fd5.json
index cfd5db06573..b228c00a7e3 100644
--- a/tests/reference/asr-callback_01-df40fd5.json
+++ b/tests/reference/asr-callback_01-df40fd5.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-callback_01-df40fd5.stdout",
-    "stdout_hash": "d8283ff4af45372de119998a592b0995335f8d6ada869664e3306a22",
+    "stdout_hash": "a8fbb30389ff308781e5cc08c41bee122eb1f40c9707b86000d81a39",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-callback_01-df40fd5.stdout b/tests/reference/asr-callback_01-df40fd5.stdout
index 85ec941f5a7..d43454d7013 100644
--- a/tests/reference/asr-callback_01-df40fd5.stdout
+++ b/tests/reference/asr-callback_01-df40fd5.stdout
@@ -182,7 +182,7 @@
                                     )
                                     []
                                     [(Var 3 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 3 x)
@@ -255,7 +255,7 @@
                                     )
                                     []
                                     [(Var 4 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 4 x)
@@ -329,7 +329,7 @@
                                     [f
                                     f2]
                                     [(Var 5 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 5 _lpython_return_variable)
                                         (IntegerBinOp
                                             (FunctionCall
@@ -509,7 +509,7 @@
                                     []
                                     [(Var 6 func)
                                     (Var 6 arg)]
-                                    [(=
+                                    [(Assignment
                                         (Var 6 ret)
                                         (FunctionCall
                                             6 func
@@ -521,7 +521,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 _lpython_return_variable)
                                         (Var 6 ret)
                                         ()
diff --git a/tests/reference/asr-cast-435c233.json b/tests/reference/asr-cast-435c233.json
index 3dd33fc6fae..fbfb94cb39a 100644
--- a/tests/reference/asr-cast-435c233.json
+++ b/tests/reference/asr-cast-435c233.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-cast-435c233.stdout",
-    "stdout_hash": "beea7e3be87c6bb603024071129f88f96a9f7729af4aec43df537f68",
+    "stdout_hash": "976d59f05dfd318c8315b0e71415f5e0905bf1ed203be1eb7f342e70",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-cast-435c233.stdout b/tests/reference/asr-cast-435c233.stdout
index 29b65cf890b..406cb861fbd 100644
--- a/tests/reference/asr-cast-435c233.stdout
+++ b/tests/reference/asr-cast-435c233.stdout
@@ -128,7 +128,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "lpython"
@@ -136,7 +136,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (FunctionCall
                                             3 list
@@ -150,7 +150,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (ListConstant
                                             [(StringConstant
@@ -171,7 +171,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (FunctionCall
                                             3 list
@@ -185,7 +185,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (ListConstant
                                             []
@@ -195,7 +195,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (FunctionCall
                                             3 list
@@ -219,7 +219,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (FunctionCall
                                             3 list
diff --git a/tests/reference/asr-complex1-f26c460.json b/tests/reference/asr-complex1-f26c460.json
index f76a12ebcaa..276410d7152 100644
--- a/tests/reference/asr-complex1-f26c460.json
+++ b/tests/reference/asr-complex1-f26c460.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-complex1-f26c460.stdout",
-    "stdout_hash": "f4e6f84bffb93e20f3a8092d52e27786b0104ef0514adf01a0fbf27b",
+    "stdout_hash": "092781fe1c5fd2eeb2902d423fa191dc0409999380ad894f4deba5f8",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-complex1-f26c460.stdout b/tests/reference/asr-complex1-f26c460.stdout
index 20b2339c17c..02ae61e801d 100644
--- a/tests/reference/asr-complex1-f26c460.stdout
+++ b/tests/reference/asr-complex1-f26c460.stdout
@@ -78,7 +78,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (ComplexBinOp
                                             (Cast
@@ -106,7 +106,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 y)
                                         (ComplexBinOp
                                             (Cast
@@ -134,7 +134,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (Cast
                                             (ComplexBinOp
@@ -150,7 +150,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (Cast
                                             (ComplexBinOp
@@ -166,7 +166,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (Cast
                                             (ComplexBinOp
@@ -370,7 +370,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 c)
                                         (Cast
                                             (FunctionCall
@@ -395,7 +395,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (FunctionCall
@@ -423,7 +423,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (FunctionCall
@@ -455,7 +455,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (FunctionCall
                                             3 complex@__lpython_overloaded_2__complex
@@ -471,7 +471,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c1)
                                         (Cast
                                             (FunctionCall
@@ -497,7 +497,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c2)
                                         (Cast
                                             (FunctionCall
@@ -526,7 +526,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c3)
                                         (FunctionCall
                                             3 complex@__lpython_overloaded_5__complex
@@ -549,7 +549,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (ComplexCompare
                                             (Var 3 c1)
@@ -560,7 +560,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (ComplexCompare
                                             (Cast
@@ -576,7 +576,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ComplexBinOp
                                             (Var 3 c1)
@@ -587,7 +587,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ComplexBinOp
                                             (Var 3 c2)
@@ -598,7 +598,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ComplexBinOp
                                             (Var 3 c1)
@@ -609,7 +609,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (ComplexBinOp
@@ -663,7 +663,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (ComplexBinOp
@@ -711,7 +711,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (ComplexBinOp
diff --git a/tests/reference/asr-const_01-af8289b.json b/tests/reference/asr-const_01-af8289b.json
index c54ff59cdd2..cffe50ea1d2 100644
--- a/tests/reference/asr-const_01-af8289b.json
+++ b/tests/reference/asr-const_01-af8289b.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-const_01-af8289b.stderr",
-    "stderr_hash": "f47e74e916315ec82f38680f66c9cf5ef3c958bcdfa87b9efe09b264",
+    "stderr_hash": "ee5a12da5ff69e8dd9689fa38e5689558cc022ce5b39072bca22a498",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-const_01-af8289b.stderr b/tests/reference/asr-const_01-af8289b.stderr
index 47034b61583..5c6d3560c37 100644
--- a/tests/reference/asr-const_01-af8289b.stderr
+++ b/tests/reference/asr-const_01-af8289b.stderr
@@ -3,3 +3,7 @@ semantic error: Constant variable x is not initialised at declaration.
   |
 4 |     x: Const[i32]
   |     ^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-const_02-fce29b7.json b/tests/reference/asr-const_02-fce29b7.json
index af31951d5b5..6c2d8bc567e 100644
--- a/tests/reference/asr-const_02-fce29b7.json
+++ b/tests/reference/asr-const_02-fce29b7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-const_02-fce29b7.stderr",
-    "stderr_hash": "b8b90da28518edbe487dbe6f52f1f25f004042fe463e8fba7b96d174",
+    "stderr_hash": "7bcbd3356f93816ef45275fb9e2b7ed5bf684bdb7f824d1744ea1ec6",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-const_02-fce29b7.stderr b/tests/reference/asr-const_02-fce29b7.stderr
index 3bdb12c2370..213fea1a795 100644
--- a/tests/reference/asr-const_02-fce29b7.stderr
+++ b/tests/reference/asr-const_02-fce29b7.stderr
@@ -3,3 +3,7 @@ semantic error: Targets with Const[i32] type cannot be re-assigned.
   |
 5 |     x = 5
   |     ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-constants1-5828e8a.json b/tests/reference/asr-constants1-5828e8a.json
index 0dcd9c57fa4..c34e7af68dd 100644
--- a/tests/reference/asr-constants1-5828e8a.json
+++ b/tests/reference/asr-constants1-5828e8a.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-constants1-5828e8a.stdout",
-    "stdout_hash": "1b3194a6cd7f73d860c5c90062d03235b25d1efc585b4bb82bd1a059",
+    "stdout_hash": "ee37a85f3fdd5a79da83bc269ca3a72982703657f76af23824786213",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-constants1-5828e8a.stdout b/tests/reference/asr-constants1-5828e8a.stdout
index 34707cf9795..67fdc7899e7 100644
--- a/tests/reference/asr-constants1-5828e8a.stdout
+++ b/tests/reference/asr-constants1-5828e8a.stdout
@@ -82,9 +82,9 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 a)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             Abs
                                             [(IntegerConstant 5 (Integer 4))]
                                             0
@@ -93,9 +93,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             Abs
                                             [(IntegerUnaryMinus
                                                 (IntegerConstant 500 (Integer 4))
@@ -108,9 +108,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             Abs
                                             [(Cast
                                                 (LogicalConstant
@@ -127,9 +127,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             Abs
                                             [(Cast
                                                 (LogicalConstant
@@ -146,10 +146,10 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (Cast
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealConstant
                                                     3.450000
@@ -171,10 +171,10 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (Cast
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealUnaryMinus
                                                     (RealConstant
@@ -203,10 +203,10 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (Cast
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(FunctionCall
                                                     5 complex@__lpython_overloaded_5__complex
@@ -308,7 +308,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 7 a)
                                         (Cast
                                             (IntegerConstant 0 (Integer 4))
@@ -321,7 +321,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 a)
                                         (Cast
                                             (IntegerUnaryMinus
@@ -338,7 +338,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 a)
                                         (Cast
                                             (StringConstant
@@ -354,7 +354,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 a)
                                         (Cast
                                             (FunctionCall
@@ -392,7 +392,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 a)
                                         (Cast
                                             (StringConstant
@@ -408,7 +408,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 7 a)
                                         (Cast
                                             (RealConstant
@@ -512,7 +512,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 bin
@@ -527,7 +527,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 bin
@@ -542,7 +542,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 bin
@@ -561,7 +561,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 oct
@@ -576,7 +576,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 oct
@@ -591,7 +591,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 oct
@@ -610,7 +610,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 hex
@@ -625,7 +625,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 hex
@@ -640,7 +640,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (FunctionCall
                                             3 hex
@@ -720,12 +720,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 9 b)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 9 a)
                                         (LogicalConstant
                                             .true.
@@ -746,7 +746,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 9 a)
                                         (LogicalConstant
                                             .false.
@@ -767,7 +767,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 9 a)
                                         (LogicalConstant
                                             .false.
@@ -846,7 +846,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 12 a)
                                         (FunctionCall
                                             12 divmod
@@ -869,7 +869,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 12 a)
                                         (FunctionCall
                                             12 divmod
@@ -896,7 +896,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 12 a)
                                         (FunctionCall
                                             12 divmod
@@ -919,7 +919,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 12 a)
                                         (FunctionCall
                                             12 divmod
@@ -942,7 +942,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 12 a)
                                         (FunctionCall
                                             12 divmod
@@ -1010,7 +1010,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 11 a)
                                         (RealConstant
                                             0.000000
@@ -1018,7 +1018,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 11 a)
                                         (RealConstant
                                             4.560000
@@ -1026,7 +1026,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 11 a)
                                         (Cast
                                             (IntegerConstant 5 (Integer 4))
@@ -1039,7 +1039,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 11 a)
                                         (Cast
                                             (IntegerUnaryMinus
@@ -1056,7 +1056,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 11 a)
                                         (Cast
                                             (LogicalConstant
@@ -1072,7 +1072,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 11 a)
                                         (Cast
                                             (LogicalConstant
@@ -1133,12 +1133,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 10 a)
                                         (IntegerConstant 0 (Integer 8))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 10 a)
                                         (Cast
                                             (RealConstant
@@ -1151,7 +1151,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 10 a)
                                         (Cast
                                             (IntegerConstant 5 (Integer 4))
@@ -1161,7 +1161,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 10 a)
                                         (Cast
                                             (RealUnaryMinus
@@ -1181,7 +1181,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 10 a)
                                         (Cast
                                             (LogicalConstant
@@ -1194,7 +1194,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 10 a)
                                         (Cast
                                             (LogicalConstant
@@ -1207,7 +1207,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 10 a)
                                         (IntegerConstant 5346 (Integer 8))
                                         ()
@@ -1275,7 +1275,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 a)
                                         (StringLen
                                             (StringConstant
@@ -1287,7 +1287,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (StringLen
                                             (StringConstant
@@ -1299,7 +1299,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (StringLen
                                             (StringConstant
@@ -1311,7 +1311,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (TupleLen
                                             (TupleConstant
@@ -1329,7 +1329,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (TupleLen
                                             (TupleConstant
@@ -1386,7 +1386,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (ListLen
                                             (ListConstant
@@ -1402,7 +1402,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (ListLen
                                             (ListConstant
@@ -1457,7 +1457,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (SetLen
                                             (SetConstant
@@ -1473,7 +1473,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (DictLen
                                             (DictConstant
@@ -1502,7 +1502,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 l)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -1515,7 +1515,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (ListLen
                                             (Var 6 l)
@@ -1528,7 +1528,7 @@
                                         (Var 6 l)
                                         (IntegerConstant 5 (Integer 4))
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a)
                                         (ListLen
                                             (Var 6 l)
@@ -1598,7 +1598,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 a)
                                         (StringOrd
                                             (StringConstant
@@ -1610,7 +1610,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 s)
                                         (StringChr
                                             (IntegerConstant 43 (Integer 4))
@@ -1667,7 +1667,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 8 s)
                                         (StringConstant
                                             ""
@@ -1675,7 +1675,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 8 s)
                                         (Cast
                                             (IntegerConstant 5 (Integer 4))
@@ -1688,7 +1688,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 8 s)
                                         (Cast
                                             (IntegerUnaryMinus
@@ -1705,7 +1705,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 8 s)
                                         (Cast
                                             (RealConstant
@@ -1721,7 +1721,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 8 s)
                                         (Cast
                                             (LogicalConstant
@@ -1737,7 +1737,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 8 s)
                                         (Cast
                                             (LogicalConstant
@@ -1753,7 +1753,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 8 s)
                                         (StringConstant
                                             "5346"
diff --git a/tests/reference/asr-cptr_01-4e660f1.json b/tests/reference/asr-cptr_01-4e660f1.json
index c554aa6d5b6..e5ef59dc7d2 100644
--- a/tests/reference/asr-cptr_01-4e660f1.json
+++ b/tests/reference/asr-cptr_01-4e660f1.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-cptr_01-4e660f1.stderr",
-    "stderr_hash": "0477f93b29ff4932b3471a59731a173fb19d6e44273236829eeaffbe",
+    "stderr_hash": "8242c95361704d7cd6822c6e71e553700fb2efc45394ffe3e9995b79",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-cptr_01-4e660f1.stderr b/tests/reference/asr-cptr_01-4e660f1.stderr
index 510fd3ad0c7..2a1440bd89d 100644
--- a/tests/reference/asr-cptr_01-4e660f1.stderr
+++ b/tests/reference/asr-cptr_01-4e660f1.stderr
@@ -3,3 +3,7 @@ semantic error: Indexing CPtr typed expressions is not supported yet
   |
 5 |     print(x[0])
   |           ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-dictionary1-a105a36.json b/tests/reference/asr-dictionary1-a105a36.json
index 3bc6f3bfd1f..991461787d0 100644
--- a/tests/reference/asr-dictionary1-a105a36.json
+++ b/tests/reference/asr-dictionary1-a105a36.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-dictionary1-a105a36.stdout",
-    "stdout_hash": "ac9f74e24e585a3382e6615e4f197e6ebda5ba099def0664967fbcc0",
+    "stdout_hash": "3ea42309cc8f2201f43bb2fdeb28a85feea890fe49db4063af5c46f8",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-dictionary1-a105a36.stdout b/tests/reference/asr-dictionary1-a105a36.stdout
index b434f5addfe..8ae305005f3 100644
--- a/tests/reference/asr-dictionary1-a105a36.stdout
+++ b/tests/reference/asr-dictionary1-a105a36.stdout
@@ -140,7 +140,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (DictConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -154,7 +154,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (DictConstant
                                             [(StringConstant
@@ -182,7 +182,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 z)
                                         (DictItem
                                             (Var 3 y)
@@ -196,7 +196,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 z)
                                         (DictItem
                                             (Var 3 y)
@@ -210,7 +210,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 z)
                                         (DictItem
                                             (Var 3 x)
@@ -285,7 +285,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 y)
                                         (DictConstant
                                             [(StringConstant
@@ -313,7 +313,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 x)
                                         (DictItem
                                             (Var 5 y)
@@ -327,7 +327,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 x)
                                         (DictItem
                                             (Var 5 y)
@@ -389,7 +389,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 y)
                                         (DictConstant
                                             [(StringConstant
@@ -493,7 +493,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 y)
                                         (DictConstant
                                             [(StringConstant
@@ -513,7 +513,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 x)
                                         (DictPop
                                             (Var 6 y)
diff --git a/tests/reference/asr-doconcurrentloop_01-3fdc189.json b/tests/reference/asr-doconcurrentloop_01-3fdc189.json
index 74736504bcf..d6ab359efa2 100644
--- a/tests/reference/asr-doconcurrentloop_01-3fdc189.json
+++ b/tests/reference/asr-doconcurrentloop_01-3fdc189.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-doconcurrentloop_01-3fdc189.stdout",
-    "stdout_hash": "b87f31e0e98b1ec330df01b0f8eafa390b61858a9e559e149e27c2a6",
+    "stdout_hash": "413974a16ffc353be79c5bba8842ef9190e2c5c845d605c96b15e55b",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-doconcurrentloop_01-3fdc189.stdout b/tests/reference/asr-doconcurrentloop_01-3fdc189.stdout
index c865fbcc891..4146667eaf8 100644
--- a/tests/reference/asr-doconcurrentloop_01-3fdc189.stdout
+++ b/tests/reference/asr-doconcurrentloop_01-3fdc189.stdout
@@ -177,7 +177,7 @@
                                     )
                                     [triad]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 scalar)
                                         (Cast
                                             (RealConstant
@@ -193,7 +193,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 nsize)
                                         (ArraySize
                                             (Var 4 a)
@@ -214,7 +214,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 4 a)
                                                 [(()
@@ -238,7 +238,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (ArrayItem
                                                 (Var 4 b)
                                                 [(()
@@ -474,7 +474,7 @@
                                     (Var 3 b)
                                     (Var 3 scalar)
                                     (Var 3 c)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 N)
                                         (ArraySize
                                             (Var 3 a)
@@ -495,7 +495,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 3 c)
                                                 [(()
diff --git a/tests/reference/asr-elemental_01-b58df26.json b/tests/reference/asr-elemental_01-b58df26.json
index 3dee5bd7476..b35d8f853ba 100644
--- a/tests/reference/asr-elemental_01-b58df26.json
+++ b/tests/reference/asr-elemental_01-b58df26.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-elemental_01-b58df26.stdout",
-    "stdout_hash": "a2a599171f233c4ffa976a40eefe89a518f74be52611595abbe82f71",
+    "stdout_hash": "3053b7358f72cd731a9fb1625231938c2f59a0df49473856482457be",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-elemental_01-b58df26.stdout b/tests/reference/asr-elemental_01-b58df26.stdout
index 7029d7eff4a..d97fd28cab6 100644
--- a/tests/reference/asr-elemental_01-b58df26.stdout
+++ b/tests/reference/asr-elemental_01-b58df26.stdout
@@ -192,9 +192,9 @@
                                     )
                                     [verify2d]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 228 array2d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -204,13 +204,14 @@
                                                 (IntegerConstant 64 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 228 cos2d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -220,6 +221,7 @@
                                                 (IntegerConstant 64 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -248,7 +250,7 @@
                                                 (IntegerConstant 63 (Integer 4))
                                             )
                                             (IntegerConstant 1 (Integer 4)))
-                                            [(=
+                                            [(Assignment
                                                 (ArrayItem
                                                     (Var 228 array2d)
                                                     [(()
@@ -279,7 +281,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 228 cos2d)
                                         (RealBinOp
                                             (FunctionCall
@@ -489,9 +491,9 @@
                                     )
                                     [verify1d_mul]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 226 array_a)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -499,13 +501,14 @@
                                                 (IntegerConstant 100 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 array_b)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -513,13 +516,14 @@
                                                 (IntegerConstant 100 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 array_c)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -527,6 +531,7 @@
                                                 (IntegerConstant 100 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -543,7 +548,7 @@
                                             (IntegerConstant 99 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 226 array_a)
                                                 [(()
@@ -575,7 +580,7 @@
                                             (IntegerConstant 99 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 226 array_b)
                                                 [(()
@@ -601,7 +606,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 226 array_c)
                                         (RealBinOp
                                             (RealBinOp
@@ -891,9 +896,9 @@
                                     [verify1d
                                     verifynd]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 227 array1d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -901,13 +906,14 @@
                                                 (IntegerConstant 256 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 227 sin1d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -915,6 +921,7 @@
                                                 (IntegerConstant 256 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -931,7 +938,7 @@
                                             (IntegerConstant 255 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 227 array1d)
                                                 [(()
@@ -951,7 +958,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 227 sin1d)
                                         (FunctionCall
                                             227 sin@__lpython_overloaded_1__sin
@@ -1010,9 +1017,9 @@
                                         ((IntegerConstant 256 (Integer 4)))]
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 227 arraynd)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1024,13 +1031,14 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 227 sinnd)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1042,6 +1050,7 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1082,7 +1091,7 @@
                                                     (IntegerConstant 15 (Integer 4))
                                                 )
                                                 (IntegerConstant 1 (Integer 4)))
-                                                [(=
+                                                [(Assignment
                                                     (ArrayItem
                                                         (Var 227 arraynd)
                                                         [(()
@@ -1124,7 +1133,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 227 sinnd)
                                         (RealBinOp
                                             (FunctionCall
@@ -1343,9 +1352,9 @@
                                     )
                                     [verify1d_sum]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 225 array_a)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1353,13 +1362,14 @@
                                                 (IntegerConstant 100 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 225 array_b)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1367,13 +1377,14 @@
                                                 (IntegerConstant 100 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 225 array_c)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1381,6 +1392,7 @@
                                                 (IntegerConstant 100 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1397,7 +1409,7 @@
                                             (IntegerConstant 99 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 225 array_a)
                                                 [(()
@@ -1429,7 +1441,7 @@
                                             (IntegerConstant 99 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 225 array_b)
                                                 [(()
@@ -1455,7 +1467,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 225 array_c)
                                         (RealBinOp
                                             (RealBinOp
@@ -1780,7 +1792,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 229 eps)
                                         (Cast
                                             (RealConstant
@@ -1796,9 +1808,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 229 arraynd)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1812,13 +1824,14 @@
                                                 (IntegerConstant 4 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 229 observed)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1832,13 +1845,14 @@
                                                 (IntegerConstant 4 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 229 observed1d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1846,6 +1860,7 @@
                                                 (IntegerConstant 65536 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1898,7 +1913,7 @@
                                                         (IntegerConstant 3 (Integer 4))
                                                     )
                                                     (IntegerConstant 1 (Integer 4)))
-                                                    [(=
+                                                    [(Assignment
                                                         (ArrayItem
                                                             (Var 229 arraynd)
                                                             [(()
@@ -1951,7 +1966,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 229 observed)
                                         (RealBinOp
                                             (RealBinOp
@@ -2059,9 +2074,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 229 newshape)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -2069,11 +2084,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 229 newshape)
                                             [(()
@@ -2086,7 +2102,7 @@
                                         (IntegerConstant 65536 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 229 observed1d)
                                         (ArrayReshape
                                             (Var 229 observed)
@@ -2126,7 +2142,7 @@
                                         (IntegerConstant 1 (Integer 4)))
                                         [(Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (ArrayItem
@@ -2228,7 +2244,7 @@
                                                     block
                                                     [(Assert
                                                         (RealCompare
-                                                            (IntrinsicScalarFunction
+                                                            (IntrinsicElementalFunction
                                                                 Abs
                                                                 [(RealBinOp
                                                                     (FunctionCall
@@ -2380,7 +2396,7 @@
                                     [(Var 220 array)
                                     (Var 220 result)
                                     (Var 220 size)]
-                                    [(=
+                                    [(Assignment
                                         (Var 220 eps)
                                         (Cast
                                             (RealConstant
@@ -2575,7 +2591,7 @@
                                     (Var 224 array_b)
                                     (Var 224 result)
                                     (Var 224 size)]
-                                    [(=
+                                    [(Assignment
                                         (Var 224 eps)
                                         (RealConstant
                                             0.000010
@@ -2597,7 +2613,7 @@
                                         (IntegerConstant 1 (Integer 4)))
                                         [(Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (RealBinOp
@@ -2837,7 +2853,7 @@
                                     (Var 223 array_b)
                                     (Var 223 result)
                                     (Var 223 size)]
-                                    [(=
+                                    [(Assignment
                                         (Var 223 eps)
                                         (RealConstant
                                             0.000000
@@ -2859,7 +2875,7 @@
                                         (IntegerConstant 1 (Integer 4)))
                                         [(Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (RealBinOp
@@ -2996,7 +3012,7 @@
                                                                     block
                                                                     [(Assert
                                                                         (RealCompare
-                                                                            (IntrinsicScalarFunction
+                                                                            (IntrinsicElementalFunction
                                                                                 Abs
                                                                                 [(RealBinOp
                                                                                     (RealBinOp
@@ -3217,7 +3233,7 @@
                                     (Var 222 result)
                                     (Var 222 size1)
                                     (Var 222 size2)]
-                                    [(=
+                                    [(Assignment
                                         (Var 222 eps)
                                         (RealConstant
                                             0.000000
@@ -3308,7 +3324,7 @@
                                                                                     block
                                                                                     [(Assert
                                                                                         (RealCompare
-                                                                                            (IntrinsicScalarFunction
+                                                                                            (IntrinsicElementalFunction
                                                                                                 Abs
                                                                                                 [(RealBinOp
                                                                                                     (RealBinOp
@@ -3596,7 +3612,7 @@
                                     (Var 221 size1)
                                     (Var 221 size2)
                                     (Var 221 size3)]
-                                    [(=
+                                    [(Assignment
                                         (Var 221 eps)
                                         (RealConstant
                                             0.000000
diff --git a/tests/reference/asr-enum_01-30e1b4a.json b/tests/reference/asr-enum_01-30e1b4a.json
index f21587576ec..6ddadb47ab7 100644
--- a/tests/reference/asr-enum_01-30e1b4a.json
+++ b/tests/reference/asr-enum_01-30e1b4a.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-enum_01-30e1b4a.stderr",
-    "stderr_hash": "ee3775d6e144fa8c18d4beeae5a5790e317f7c4d26212100d03f29d4",
+    "stderr_hash": "ffe4d855c9b53ad57a7d2c709c9279f1a49b97e6e5c1c88c15b0a578",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-enum_01-30e1b4a.stderr b/tests/reference/asr-enum_01-30e1b4a.stderr
index 0947a787eaa..adac72391cc 100644
--- a/tests/reference/asr-enum_01-30e1b4a.stderr
+++ b/tests/reference/asr-enum_01-30e1b4a.stderr
@@ -7,3 +7,7 @@ semantic error: Enumerations with non-integer or non-unique integer values canno
   |
 8 |        BLUE: f64 = 0.7
   | ...^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-enum_02-54656c5.json b/tests/reference/asr-enum_02-54656c5.json
index a989cef1769..db3f67f755d 100644
--- a/tests/reference/asr-enum_02-54656c5.json
+++ b/tests/reference/asr-enum_02-54656c5.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-enum_02-54656c5.stderr",
-    "stderr_hash": "88c95223e82c39f9d40d9f62923d1bffdf3a9f0a47565bad19b37dee",
+    "stderr_hash": "3b452b5d2b62f231751fd906f2105235733c122d37b6780b8fc72ab3",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-enum_02-54656c5.stderr b/tests/reference/asr-enum_02-54656c5.stderr
index 39fb6429e6b..1beec7b08c4 100644
--- a/tests/reference/asr-enum_02-54656c5.stderr
+++ b/tests/reference/asr-enum_02-54656c5.stderr
@@ -7,3 +7,7 @@ semantic error: Enumerations with non-integer or non-unique integer values canno
   |
 8 |        BLUE: i32 = 2
   | ...^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-expr1-8df2d66.json b/tests/reference/asr-expr1-8df2d66.json
index c8405e85b6a..14586c7302e 100644
--- a/tests/reference/asr-expr1-8df2d66.json
+++ b/tests/reference/asr-expr1-8df2d66.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr1-8df2d66.stdout",
-    "stdout_hash": "55544ca6dbfc171a34a0018673cdfada1938540123d89da76150a372",
+    "stdout_hash": "f80b1b22cac2640f90a800ced131163389d7bc2c821daa9f28618c73",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr1-8df2d66.stdout b/tests/reference/asr-expr1-8df2d66.stdout
index f84e24042d9..60e468b1c44 100644
--- a/tests/reference/asr-expr1-8df2d66.stdout
+++ b/tests/reference/asr-expr1-8df2d66.stdout
@@ -78,7 +78,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (NamedExpr
                                             (Var 3 y)
@@ -100,7 +100,7 @@
                                             )
                                             (Integer 4)
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 3 x)
                                             (IntegerConstant 1 (Integer 4))
                                             ()
@@ -114,7 +114,7 @@
                                             (IntegerConstant 1 (Integer 4))
                                             (Integer 4)
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 3 y)
                                             (IntegerConstant 1 (Integer 4))
                                             ()
diff --git a/tests/reference/asr-expr10-efcbb1b.json b/tests/reference/asr-expr10-efcbb1b.json
index be5a49cf818..3767bde0589 100644
--- a/tests/reference/asr-expr10-efcbb1b.json
+++ b/tests/reference/asr-expr10-efcbb1b.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr10-efcbb1b.stdout",
-    "stdout_hash": "7ab3ed61f6e7e3c3af821e2d954e321eaf49af5bd80886dcb03f7562",
+    "stdout_hash": "4ac6fe05a2094e4deb737d529206b7393ee37e0abf0223b92d124850",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr10-efcbb1b.stdout b/tests/reference/asr-expr10-efcbb1b.stdout
index 7941ddc4041..eb6a363358a 100644
--- a/tests/reference/asr-expr10-efcbb1b.stdout
+++ b/tests/reference/asr-expr10-efcbb1b.stdout
@@ -172,12 +172,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 500 (Integer 4))
@@ -186,7 +186,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerBitNot
                                             (IntegerConstant 5 (Integer 4))
@@ -195,7 +195,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalNot
                                             (Cast
@@ -215,7 +215,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalNot
                                             (Cast
@@ -239,7 +239,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalNot
                                             (Cast
@@ -259,7 +259,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             1.000000
@@ -267,7 +267,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealUnaryMinus
                                             (Cast
@@ -290,7 +290,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b1)
                                         (LogicalConstant
                                             .true.
@@ -298,7 +298,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b2)
                                         (LogicalNot
                                             (LogicalConstant
@@ -313,7 +313,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b3)
                                         (LogicalNot
                                             (Var 3 b2)
@@ -322,12 +322,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -344,7 +344,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerBitNot
                                             (Cast
@@ -361,7 +361,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ComplexConstant
                                             1.000000
@@ -370,7 +370,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ComplexUnaryMinus
                                             (Cast
@@ -407,7 +407,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b1)
                                         (LogicalConstant
                                             .false.
@@ -415,7 +415,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b2)
                                         (LogicalConstant
                                             .true.
diff --git a/tests/reference/asr-expr11-9b91d35.json b/tests/reference/asr-expr11-9b91d35.json
index 27fc53c56a4..6eb7924f0b1 100644
--- a/tests/reference/asr-expr11-9b91d35.json
+++ b/tests/reference/asr-expr11-9b91d35.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr11-9b91d35.stdout",
-    "stdout_hash": "119588e11efc6683fe77260a150cf2622aad182814252c73dbc0b2e1",
+    "stdout_hash": "e1b95463b42d9a086ed796331d18b6feafb16d8b82b6e14dcf6576ad",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr11-9b91d35.stdout b/tests/reference/asr-expr11-9b91d35.stdout
index 499a59590cb..943df6c92d8 100644
--- a/tests/reference/asr-expr11-9b91d35.stdout
+++ b/tests/reference/asr-expr11-9b91d35.stdout
@@ -46,7 +46,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (StringRepeat
                                             (StringConstant
@@ -62,7 +62,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringRepeat
                                             (StringConstant
@@ -82,7 +82,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringRepeat
                                             (StringConstant
@@ -98,7 +98,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringRepeat
                                             (StringConstant
@@ -114,7 +114,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringRepeat
                                             (StringConstant
@@ -134,7 +134,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringRepeat
                                             (StringRepeat
diff --git a/tests/reference/asr-expr12-5c5b71e.json b/tests/reference/asr-expr12-5c5b71e.json
index f191d585177..576db116603 100644
--- a/tests/reference/asr-expr12-5c5b71e.json
+++ b/tests/reference/asr-expr12-5c5b71e.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr12-5c5b71e.stdout",
-    "stdout_hash": "68b01cfc65c60b82cb2ba5017c95cb10e05d130d085674593975310e",
+    "stdout_hash": "cc7faf4b191f80b30f9ba8ba5dc649e69a276ee40352403a890a7ecb",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr12-5c5b71e.stdout b/tests/reference/asr-expr12-5c5b71e.stdout
index 4b91ecc679c..466b7f88f67 100644
--- a/tests/reference/asr-expr12-5c5b71e.stdout
+++ b/tests/reference/asr-expr12-5c5b71e.stdout
@@ -98,7 +98,7 @@
                                     )
                                     [test]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 a)
                                         (FunctionCall
                                             2 test
@@ -111,7 +111,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 _lpython_return_variable)
                                         (Var 4 a)
                                         ()
@@ -162,7 +162,7 @@
                                     )
                                     [check]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 x)
                                         (FunctionCall
                                             2 check
@@ -253,7 +253,7 @@
                                     []
                                     [(Var 3 a)
                                     (Var 3 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 3 a)
diff --git a/tests/reference/asr-expr13-81bdb5a.json b/tests/reference/asr-expr13-81bdb5a.json
index 4ed78ba723e..26e00b8b8d2 100644
--- a/tests/reference/asr-expr13-81bdb5a.json
+++ b/tests/reference/asr-expr13-81bdb5a.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr13-81bdb5a.stdout",
-    "stdout_hash": "49263833f1645d67ff5a809022f16c6437f9175a35ab7341f13c580f",
+    "stdout_hash": "7ded7f762f74bec6cd0fb3b413abf192b9b19e80a10280ea0125d442",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr13-81bdb5a.stdout b/tests/reference/asr-expr13-81bdb5a.stdout
index 2b9a961d027..e25b37e2e65 100644
--- a/tests/reference/asr-expr13-81bdb5a.stdout
+++ b/tests/reference/asr-expr13-81bdb5a.stdout
@@ -76,7 +76,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerCompare
                                             (IntegerConstant 5 (Integer 4))
@@ -90,7 +90,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerCompare
                                             (IntegerConstant 5 (Integer 4))
@@ -104,7 +104,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerCompare
                                             (IntegerConstant 5 (Integer 4))
@@ -118,7 +118,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (RealCompare
                                             (RealConstant
@@ -138,7 +138,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (RealCompare
                                             (RealConstant
@@ -158,7 +158,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (RealCompare
                                             (RealConstant
@@ -178,7 +178,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (ComplexCompare
                                             (FunctionCall
@@ -222,7 +222,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -242,7 +242,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -262,7 +262,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -282,7 +282,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -302,7 +302,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -322,7 +322,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -342,7 +342,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (StringCompare
                                             (StringConstant
@@ -362,7 +362,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalCompare
                                             (LogicalConstant
@@ -382,7 +382,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalCompare
                                             (LogicalConstant
@@ -402,7 +402,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalCompare
                                             (LogicalConstant
@@ -422,7 +422,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalCompare
                                             (LogicalConstant
diff --git a/tests/reference/asr-expr16-a3dc453.json b/tests/reference/asr-expr16-a3dc453.json
index 14ce11462ea..a40427a8560 100644
--- a/tests/reference/asr-expr16-a3dc453.json
+++ b/tests/reference/asr-expr16-a3dc453.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-expr16-a3dc453.stderr",
-    "stderr_hash": "67cb0d8b08c9910cfdf81faffe003dec601823ff0fd07990a478baf4",
+    "stderr_hash": "5e2be92ee502526a6c5f1aa78d0165103f5f066c76918ee8fcd3bcb1",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-expr16-a3dc453.stderr b/tests/reference/asr-expr16-a3dc453.stderr
index 7b8ae5a07d3..e13f8400ac1 100644
--- a/tests/reference/asr-expr16-a3dc453.stderr
+++ b/tests/reference/asr-expr16-a3dc453.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in shorthand operator, the types must be compatibl
   |
 6 |         sum += data[i]
   |         ^^^    ^^^^^^^ type mismatch ('f64' and 'i32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-expr2-2e78a12.json b/tests/reference/asr-expr2-2e78a12.json
index fb9017f6923..127c79cee3d 100644
--- a/tests/reference/asr-expr2-2e78a12.json
+++ b/tests/reference/asr-expr2-2e78a12.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr2-2e78a12.stdout",
-    "stdout_hash": "2ff834685a67310d1ac788a1882209a5179ab17c41e4be40773a53a6",
+    "stdout_hash": "bc0b95ce4ed46823cc16626129a52ee2c7e5318903cbeb7e65b91ce5",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr2-2e78a12.stdout b/tests/reference/asr-expr2-2e78a12.stdout
index 510df79e02f..50167eff6e9 100644
--- a/tests/reference/asr-expr2-2e78a12.stdout
+++ b/tests/reference/asr-expr2-2e78a12.stdout
@@ -62,7 +62,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (LogicalConstant
                                             .false.
@@ -70,7 +70,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .true.
@@ -78,7 +78,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalBinOp
                                             (Var 3 a)
@@ -89,7 +89,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalBinOp
                                             (Var 3 a)
@@ -103,7 +103,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalBinOp
                                             (Var 3 a)
@@ -114,7 +114,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalBinOp
                                             (Var 3 a)
@@ -131,7 +131,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalBinOp
                                             (Var 3 a)
@@ -148,7 +148,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (LogicalBinOp
                                             (Var 3 b)
diff --git a/tests/reference/asr-expr4-cef6743.json b/tests/reference/asr-expr4-cef6743.json
index 76521609ad5..12d1845f1bc 100644
--- a/tests/reference/asr-expr4-cef6743.json
+++ b/tests/reference/asr-expr4-cef6743.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr4-cef6743.stdout",
-    "stdout_hash": "666ba33cd5ae1e6c79478d456ed9d2ad73bf5497f8a541debadd4738",
+    "stdout_hash": "e50df4848f48a885a035b018d0575749af5192d1ebd257d45fa1a491",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr4-cef6743.stdout b/tests/reference/asr-expr4-cef6743.stdout
index 30d1e989c53..880e6228064 100644
--- a/tests/reference/asr-expr4-cef6743.stdout
+++ b/tests/reference/asr-expr4-cef6743.stdout
@@ -62,12 +62,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerConstant 20 (Integer 4))
                                         ()
diff --git a/tests/reference/asr-expr5-645ffcc.json b/tests/reference/asr-expr5-645ffcc.json
index 890d1b68c66..d90b7ef5963 100644
--- a/tests/reference/asr-expr5-645ffcc.json
+++ b/tests/reference/asr-expr5-645ffcc.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr5-645ffcc.stdout",
-    "stdout_hash": "c7893c51dec391aa10b49e7839e0b95eff9b93332273faad253f758f",
+    "stdout_hash": "808a813f58fb818b9d2187476517134f2ec87199cfc9c348d7657ea9",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr5-645ffcc.stdout b/tests/reference/asr-expr5-645ffcc.stdout
index 52dd2fcc4b7..e17eddc53c4 100644
--- a/tests/reference/asr-expr5-645ffcc.stdout
+++ b/tests/reference/asr-expr5-645ffcc.stdout
@@ -46,7 +46,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (StringConcat
                                             (StringConstant
@@ -65,7 +65,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConcat
                                             (StringConstant
@@ -84,7 +84,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConcat
                                             (StringConcat
diff --git a/tests/reference/asr-expr6-368e5ed.json b/tests/reference/asr-expr6-368e5ed.json
index 3255a6bb276..7fbad5a8ac7 100644
--- a/tests/reference/asr-expr6-368e5ed.json
+++ b/tests/reference/asr-expr6-368e5ed.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr6-368e5ed.stdout",
-    "stdout_hash": "eb681d9c5f81c0d94cd1f175bfb84ec29803a153327f1c7a5a17b7d4",
+    "stdout_hash": "38c2f55590dfedacd997ee117434700aa0d2df34e698820c1b5e2792",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr6-368e5ed.stdout b/tests/reference/asr-expr6-368e5ed.stdout
index bb68ad16a93..9e709fabf47 100644
--- a/tests/reference/asr-expr6-368e5ed.stdout
+++ b/tests/reference/asr-expr6-368e5ed.stdout
@@ -78,12 +78,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IfExp
                                             (IntegerCompare
@@ -100,7 +100,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (IfExp
                                             (IntegerCompare
diff --git a/tests/reference/asr-expr7-480ba2f.json b/tests/reference/asr-expr7-480ba2f.json
index e92547c7d65..04a686a609f 100644
--- a/tests/reference/asr-expr7-480ba2f.json
+++ b/tests/reference/asr-expr7-480ba2f.json
@@ -6,8 +6,8 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr7-480ba2f.stdout",
-    "stdout_hash": "05afdf3289ac02304cef8b61bc6e67c5a1e45f5c58bf7ad7c08fa5d8",
+    "stdout_hash": "6c5581a5fbdf201e4bd0f17e0fd6f8a154cf2d823784e09e77b0d1dd",
     "stderr": "asr-expr7-480ba2f.stderr",
-    "stderr_hash": "6e9790ac88db1a9ead8f64a91ba8a6605de67167037908a74b77be0c",
+    "stderr_hash": "14266d9eecb4272a8102f9495568abd799c50f1741a894f56101ddd8",
     "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-expr7-480ba2f.stderr b/tests/reference/asr-expr7-480ba2f.stderr
index a4fad29beb7..3658b5c161b 100644
--- a/tests/reference/asr-expr7-480ba2f.stderr
+++ b/tests/reference/asr-expr7-480ba2f.stderr
@@ -9,3 +9,7 @@ style suggestion: Could have used '**' instead of 'pow'
   |
 8 |     res = i32(pow(a, b))
   |               ^^^^^^^^^ '**' could be used instead
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-expr7-480ba2f.stdout b/tests/reference/asr-expr7-480ba2f.stdout
index 6b3fa7f178b..1892879fa2b 100644
--- a/tests/reference/asr-expr7-480ba2f.stdout
+++ b/tests/reference/asr-expr7-480ba2f.stdout
@@ -89,7 +89,7 @@
                                         []
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c)
                                         (FunctionCall
                                             2 test_pow_1
@@ -167,7 +167,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (Cast
                                             (FunctionCall
@@ -303,7 +303,7 @@
                                     []
                                     [(Var 4 a)
                                     (Var 4 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 res)
                                         (Cast
                                             (FunctionCall
@@ -321,7 +321,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 _lpython_return_variable)
                                         (Var 4 res)
                                         ()
diff --git a/tests/reference/asr-expr8-6beda60.json b/tests/reference/asr-expr8-6beda60.json
index 9fb8c510aba..f9b76436778 100644
--- a/tests/reference/asr-expr8-6beda60.json
+++ b/tests/reference/asr-expr8-6beda60.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr8-6beda60.stdout",
-    "stdout_hash": "b79ac7dd790182c720f71316cdcedbd0a6b3b1bd56ef5cb800fab8dd",
+    "stdout_hash": "d3ed75b48a59cad2bab8967200596c560fb86809d16147c2d9b9e5d9",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr8-6beda60.stdout b/tests/reference/asr-expr8-6beda60.stdout
index cda03a79a59..fb6c3542476 100644
--- a/tests/reference/asr-expr8-6beda60.stdout
+++ b/tests/reference/asr-expr8-6beda60.stdout
@@ -94,7 +94,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (IntegerConstant 2 (Integer 4))
@@ -105,7 +105,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x2)
                                         (Cast
                                             (RealBinOp
@@ -133,7 +133,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (IntegerConstant 54 (Integer 4))
@@ -144,7 +144,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x2)
                                         (Cast
                                             (RealBinOp
@@ -184,7 +184,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x2)
                                         (Cast
                                             (RealBinOp
@@ -212,7 +212,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x2)
                                         (Cast
                                             (RealBinOp
@@ -240,7 +240,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (Cast
@@ -267,7 +267,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (Cast
@@ -294,7 +294,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (Cast
@@ -321,7 +321,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (Cast
@@ -348,7 +348,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b1)
                                         (LogicalConstant
                                             .true.
@@ -356,7 +356,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b2)
                                         (LogicalConstant
                                             .false.
@@ -364,10 +364,10 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (Cast
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(Var 3 b1)
                                                 (Var 3 b1)]
@@ -381,7 +381,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (Cast
diff --git a/tests/reference/asr-expr9-814e4bc.json b/tests/reference/asr-expr9-814e4bc.json
index 5e5e4e24e76..e6b8a6023c8 100644
--- a/tests/reference/asr-expr9-814e4bc.json
+++ b/tests/reference/asr-expr9-814e4bc.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr9-814e4bc.stdout",
-    "stdout_hash": "a8334d45029aef40c38c8014b64aa2520c38fdc0186ae85869d72c36",
+    "stdout_hash": "922dc300e7301fe54ac9c1bd22b4cda2551dcaa4ea76fb131db41882",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr9-814e4bc.stdout b/tests/reference/asr-expr9-814e4bc.stdout
index 70042e2dcd7..0313c83f89b 100644
--- a/tests/reference/asr-expr9-814e4bc.stdout
+++ b/tests/reference/asr-expr9-814e4bc.stdout
@@ -100,7 +100,7 @@
                                     test_return_2
                                     test_return_3]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 i)
                                         (FunctionCall
                                             2 test_return_1
@@ -112,7 +112,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 s)
                                         (FunctionCall
                                             2 test_return_2
@@ -124,7 +124,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 i)
                                         (FunctionCall
                                             2 test_return_3
@@ -213,12 +213,12 @@
                                     )
                                     []
                                     [(Var 3 a)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 _lpython_return_variable)
                                         (Var 3 x)
                                         ()
@@ -301,7 +301,7 @@
                                     )
                                     []
                                     [(Var 4 a)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (StringConstant
                                             "test"
@@ -309,7 +309,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 _lpython_return_variable)
                                         (Var 4 x)
                                         ()
@@ -376,7 +376,7 @@
                                     )
                                     []
                                     [(Var 5 a)]
-                                    [(=
+                                    [(Assignment
                                         (Var 5 _lpython_return_variable)
                                         (Var 5 a)
                                         ()
diff --git a/tests/reference/asr-expr_01-211000e.json b/tests/reference/asr-expr_01-211000e.json
index 2f242ea9776..f164bfc97c7 100644
--- a/tests/reference/asr-expr_01-211000e.json
+++ b/tests/reference/asr-expr_01-211000e.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_01-211000e.stdout",
-    "stdout_hash": "55ef3fa5588fa753b58860ce4178bd454bce8e1c5c26842bcfe15bbd",
+    "stdout_hash": "1e770e5983d3028716293596137effa14c8ff482aff2f0f1d1efc3c4",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_01-211000e.stdout b/tests/reference/asr-expr_01-211000e.stdout
index 2ba434fe819..b76d1a9c366 100644
--- a/tests/reference/asr-expr_01-211000e.stdout
+++ b/tests/reference/asr-expr_01-211000e.stdout
@@ -130,7 +130,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (IntegerBinOp
                                             (IntegerBinOp
diff --git a/tests/reference/asr-expr_01-a0d4829.json b/tests/reference/asr-expr_01-a0d4829.json
index 23075b510da..46521dcd31a 100644
--- a/tests/reference/asr-expr_01-a0d4829.json
+++ b/tests/reference/asr-expr_01-a0d4829.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_01-a0d4829.stdout",
-    "stdout_hash": "22c544446be0bf9235672437a74b58e230def3217713441058c35b49",
+    "stdout_hash": "81e8dec77a5c7bda11b512e25b14698a02c7923cacfd5d491a86e0b6",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_01-a0d4829.stdout b/tests/reference/asr-expr_01-a0d4829.stdout
index 2f80c815e46..3e27c5fd644 100644
--- a/tests/reference/asr-expr_01-a0d4829.stdout
+++ b/tests/reference/asr-expr_01-a0d4829.stdout
@@ -116,7 +116,7 @@
                                     []
                                     [(Var 3 x)
                                     (Var 3 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 3 x)
@@ -207,7 +207,7 @@
                                     []
                                     [(Var 4 x)
                                     (Var 4 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 4 x)
@@ -297,7 +297,7 @@
                                     [add
                                     and_op]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 x)
                                         (IntegerBinOp
                                             (IntegerBinOp
@@ -314,7 +314,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 y)
                                         (IntegerBinOp
                                             (FunctionCall
@@ -353,7 +353,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 z)
                                         (FunctionCall
                                             2 and_op
diff --git a/tests/reference/asr-expr_05-3a37324.json b/tests/reference/asr-expr_05-3a37324.json
index fd18bef00ae..3aa8100a33a 100644
--- a/tests/reference/asr-expr_05-3a37324.json
+++ b/tests/reference/asr-expr_05-3a37324.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_05-3a37324.stdout",
-    "stdout_hash": "10748750b5ee8a95cb883f0d3248ef706a24bea040d2ab9702595f5a",
+    "stdout_hash": "495870ee10e0790fb0f932f2c3f460241e5fd0a4203d237a5bd12820",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_05-3a37324.stdout b/tests/reference/asr-expr_05-3a37324.stdout
index 09f1032d957..b5b500626fc 100644
--- a/tests/reference/asr-expr_05-3a37324.stdout
+++ b/tests/reference/asr-expr_05-3a37324.stdout
@@ -289,12 +289,12 @@
                                     [test_multiply
                                     test_mod]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 a)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 5 (Integer 4))
@@ -303,7 +303,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 eps)
                                         (RealConstant
                                             0.000000
@@ -333,7 +333,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 i)
                                         (Cast
                                             (IntegerConstant 1 (Integer 4))
@@ -343,7 +343,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 i)
                                         (IntegerBinOp
                                             (Var 5 i)
@@ -374,12 +374,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
@@ -420,12 +420,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerConstant 123282374 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerConstant 32771 (Integer 4))
                                         ()
@@ -448,7 +448,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 5345 (Integer 4))
@@ -457,7 +457,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 534 (Integer 4))
@@ -488,7 +488,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 123282374 (Integer 4))
@@ -497,7 +497,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerConstant 32771 (Integer 4))
                                         ()
@@ -704,12 +704,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 i1)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 i2)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
@@ -818,12 +818,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 i3)
                                         (IntegerConstant 432534534 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 i4)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 4325 (Integer 4))
@@ -916,12 +916,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerBinOp
                                             (Var 5 a)
@@ -942,7 +942,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerBinOp
                                             (Var 5 a)
@@ -963,12 +963,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (FunctionCall
                                             5 _mod@__lpython_overloaded_2___mod
@@ -991,12 +991,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerBinOp
                                             (Var 5 a)
@@ -1017,7 +1017,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerBinOp
                                             (Var 5 a)
@@ -1038,7 +1038,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (IntegerBinOp
                                             (Var 5 a)
@@ -1059,7 +1059,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerBinOp
                                             (Var 5 b)
@@ -1169,7 +1169,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1231,7 +1231,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1284,7 +1284,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a1)
                                         (Cast
                                             (IntegerConstant 10 (Integer 4))
@@ -1301,7 +1301,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b1)
                                         (Cast
                                             (IntegerConstant 3 (Integer 4))
@@ -1318,7 +1318,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c1)
                                         (FunctionCall
                                             5 _mod@__lpython_overloaded_4___mod
@@ -1355,9 +1355,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c1)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             FloorDiv
                                             [(Var 5 a1)
                                             (Var 5 b1)]
@@ -1490,7 +1490,7 @@
                                     []
                                     [(Var 4 a)
                                     (Var 4 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 _lpython_return_variable)
                                         (FunctionCall
                                             4 _mod@__lpython_overloaded_2___mod
@@ -1583,7 +1583,7 @@
                                     []
                                     [(Var 3 a)
                                     (Var 3 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 3 a)
diff --git a/tests/reference/asr-expr_07-7742668.json b/tests/reference/asr-expr_07-7742668.json
index f22e910c6af..bb5c99c5d7d 100644
--- a/tests/reference/asr-expr_07-7742668.json
+++ b/tests/reference/asr-expr_07-7742668.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_07-7742668.stdout",
-    "stdout_hash": "3d6f2e6a2f297f77eb89fa3169ada477efb4806398d84d425db7ee4b",
+    "stdout_hash": "15b03241d340d1abbeb06e4540d37bcd9307d085f7c484ed822f8555",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_07-7742668.stdout b/tests/reference/asr-expr_07-7742668.stdout
index ca96184588d..a9537e69384 100644
--- a/tests/reference/asr-expr_07-7742668.stdout
+++ b/tests/reference/asr-expr_07-7742668.stdout
@@ -89,7 +89,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 var)
                                         (LogicalConstant
                                             .true.
@@ -131,7 +131,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 var)
                                         (LogicalConstant
                                             .false.
@@ -261,22 +261,22 @@
                                     )
                                     [g]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 a)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (IntegerConstant 3 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Var 4 x)
diff --git a/tests/reference/asr-expr_09-f3e89c8.json b/tests/reference/asr-expr_09-f3e89c8.json
index 0aec74e9733..f64d2816af7 100644
--- a/tests/reference/asr-expr_09-f3e89c8.json
+++ b/tests/reference/asr-expr_09-f3e89c8.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_09-f3e89c8.stdout",
-    "stdout_hash": "1324aa048cd781878bc51344fea846730c0a0c860930ee839bbc5284",
+    "stdout_hash": "6e8a419784bc7e466429ca4f3f3b0d6a1883b2dd0c5718fe71361765",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_09-f3e89c8.stdout b/tests/reference/asr-expr_09-f3e89c8.stdout
index 43e964d53bf..7d736d1d8c5 100644
--- a/tests/reference/asr-expr_09-f3e89c8.stdout
+++ b/tests/reference/asr-expr_09-f3e89c8.stdout
@@ -112,22 +112,22 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i1)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i1)
                                         (IntegerConstant 3 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
@@ -255,7 +255,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (TupleConstant
                                             [(Var 5 a)
                                             (Var 5 b)]
@@ -274,7 +274,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c)
                                         (TupleConstant
                                             [(IntegerConstant 2 (Integer 4))
@@ -549,12 +549,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 g)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 d)
                                         (RealBinOp
                                             (Cast
@@ -573,7 +573,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 e)
                                         (RealBinOp
                                             (Cast
@@ -592,17 +592,17 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 a)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 c)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
@@ -637,7 +637,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (RealConstant
                                             23.000000
@@ -645,7 +645,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 y)
                                         (RealConstant
                                             23.000000
@@ -655,7 +655,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 4 x)
@@ -683,7 +683,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 4 y)
@@ -711,7 +711,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 4 e)
@@ -739,7 +739,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 4 d)
@@ -765,7 +765,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 k)
                                         (ListConstant
                                             []
@@ -775,7 +775,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 g)
                                         (IntegerConstant 0 (Integer 4))
                                         ()
@@ -821,12 +821,12 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (Var 4 k)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 j)
                                         (Var 4 k)
                                         ()
@@ -845,7 +845,7 @@
                                         (IntegerConstant 1 (Integer 4)))
                                         [(Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (ListItem
@@ -880,7 +880,7 @@
                                         )
                                         (Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (ListItem
@@ -915,7 +915,7 @@
                                         )
                                         (Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (RealBinOp
diff --git a/tests/reference/asr-expr_10-d39708c.json b/tests/reference/asr-expr_10-d39708c.json
index 19558e3c363..5d87486d4cb 100644
--- a/tests/reference/asr-expr_10-d39708c.json
+++ b/tests/reference/asr-expr_10-d39708c.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_10-d39708c.stdout",
-    "stdout_hash": "97c3e89ccc963a093255f2df997a14962c244d4ed454ebb3942c39a5",
+    "stdout_hash": "937ab19f6b8e31442a9a1b0c6bd4fa931e4d10aae2e80a351256227f",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_10-d39708c.stdout b/tests/reference/asr-expr_10-d39708c.stdout
index 7daf5f8c8bc..1ff47856c98 100644
--- a/tests/reference/asr-expr_10-d39708c.stdout
+++ b/tests/reference/asr-expr_10-d39708c.stdout
@@ -82,7 +82,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
@@ -216,7 +216,7 @@
                                     [g
                                     gsubrout]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 i)
                                         (FunctionCall
                                             2 g
@@ -228,7 +228,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 j)
                                         (FunctionCall
                                             2 g
@@ -240,7 +240,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 __lcompilers_dummy)
                                         (FunctionCall
                                             2 g
diff --git a/tests/reference/asr-expr_12-6769be0.json b/tests/reference/asr-expr_12-6769be0.json
index b8830172cd6..c9e1e1704e5 100644
--- a/tests/reference/asr-expr_12-6769be0.json
+++ b/tests/reference/asr-expr_12-6769be0.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_12-6769be0.stdout",
-    "stdout_hash": "0f537c49f019d14a0240da9280de2e6d05afee0ad5dbdb4b3646e730",
+    "stdout_hash": "2d85d51b025a58090c9848f23b6bfc7e236771cbeb8b6257e33256b5",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_12-6769be0.stdout b/tests/reference/asr-expr_12-6769be0.stdout
index 8b111ab1e3f..ad61bc5b2f9 100644
--- a/tests/reference/asr-expr_12-6769be0.stdout
+++ b/tests/reference/asr-expr_12-6769be0.stdout
@@ -327,7 +327,7 @@
                                     []
                                     [(Var 3 x)
                                     (Var 3 y)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 3 y)
                                             [(()
@@ -345,7 +345,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 3 y)
                                             [(()
@@ -363,7 +363,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (GetPointer
                                             (Var 3 y)
diff --git a/tests/reference/asr-expr_14-f2bd343.json b/tests/reference/asr-expr_14-f2bd343.json
index 59cc62002a6..27100932598 100644
--- a/tests/reference/asr-expr_14-f2bd343.json
+++ b/tests/reference/asr-expr_14-f2bd343.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-expr_14-f2bd343.stdout",
-    "stdout_hash": "b03cf9660c69a5bd18468550cc176ffd6f219869f5b9a198c2b23e71",
+    "stdout_hash": "d0556c7ad91fa6f49b4dc82b49e50843ffc424a9289b800e1bceb863",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-expr_14-f2bd343.stdout b/tests/reference/asr-expr_14-f2bd343.stdout
index 004396081b0..44d81d07ce1 100644
--- a/tests/reference/asr-expr_14-f2bd343.stdout
+++ b/tests/reference/asr-expr_14-f2bd343.stdout
@@ -354,17 +354,17 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a1)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a2)
                                         (IntegerConstant 9 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a3)
                                         (RealBinOp
                                             (Cast
@@ -387,7 +387,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 3 a3)
@@ -413,7 +413,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b1)
                                         (Cast
                                             (IntegerConstant 2 (Integer 4))
@@ -423,7 +423,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b2)
                                         (Cast
                                             (IntegerConstant 10 (Integer 4))
@@ -433,7 +433,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b3)
                                         (RealBinOp
                                             (Cast
@@ -456,7 +456,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 3 b3)
@@ -482,7 +482,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c1)
                                         (Cast
                                             (RealConstant
@@ -498,7 +498,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c2)
                                         (Cast
                                             (RealConstant
@@ -514,7 +514,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c3)
                                         (RealBinOp
                                             (Var 3 c2)
@@ -527,7 +527,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 3 c3)
@@ -569,7 +569,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d1)
                                         (RealConstant
                                             4.000000
@@ -577,7 +577,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d2)
                                         (RealConstant
                                             12.000000
@@ -585,7 +585,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d3)
                                         (RealBinOp
                                             (Var 3 d2)
@@ -598,7 +598,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 3 d3)
@@ -624,7 +624,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 e1)
                                         (ComplexBinOp
                                             (Cast
@@ -661,7 +661,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 e2)
                                         (ComplexBinOp
                                             (Cast
@@ -698,7 +698,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 e3)
                                         (ComplexBinOp
                                             (Var 3 e2)
@@ -711,7 +711,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(ComplexBinOp
                                                     (ComplexBinOp
@@ -773,7 +773,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f1)
                                         (ComplexBinOp
                                             (Cast
@@ -801,7 +801,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f2)
                                         (ComplexBinOp
                                             (Cast
@@ -829,7 +829,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f3)
                                         (ComplexBinOp
                                             (Var 3 f2)
@@ -842,7 +842,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(ComplexBinOp
                                                     (ComplexBinOp
diff --git a/tests/reference/asr-func_01-d87aa4a.json b/tests/reference/asr-func_01-d87aa4a.json
index 2ac3164ce43..f75ad9b3f9d 100644
--- a/tests/reference/asr-func_01-d87aa4a.json
+++ b/tests/reference/asr-func_01-d87aa4a.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_01-d87aa4a.stderr",
-    "stderr_hash": "2a773033fab41aadd3ddf3732cfb473ba5da6c9649453516286dacf1",
+    "stderr_hash": "a2c1046cadbd9dcca3eb4c55832c99d958d01eb31a75ccc9e768693b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_01-d87aa4a.stderr b/tests/reference/asr-func_01-d87aa4a.stderr
index 3963b1e1d51..d1bead0c59c 100644
--- a/tests/reference/asr-func_01-d87aa4a.stderr
+++ b/tests/reference/asr-func_01-d87aa4a.stderr
@@ -7,3 +7,7 @@ semantic error: Function f is already defined
    |
 10 |        print(i + 2)
    | ...^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_02-b439474.json b/tests/reference/asr-func_02-b439474.json
index bc648e06af7..b600daf84f1 100644
--- a/tests/reference/asr-func_02-b439474.json
+++ b/tests/reference/asr-func_02-b439474.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_02-b439474.stderr",
-    "stderr_hash": "855967bc8c46a46b93c348de6e3004107861b10fad24496866c8a197",
+    "stderr_hash": "49d57f0649497df70b4f2ea87e00000278d40f151aafc2a9802bc6e0",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_02-b439474.stderr b/tests/reference/asr-func_02-b439474.stderr
index e4d6ca0563e..cfef5657a75 100644
--- a/tests/reference/asr-func_02-b439474.stderr
+++ b/tests/reference/asr-func_02-b439474.stderr
@@ -3,3 +3,7 @@ semantic error: Assignment to an input function parameter `n` is not allowed
   |
 4 |     n = 5
   |     ^ Hint: create a new local variable with a different name
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_03-cd744a0.json b/tests/reference/asr-func_03-cd744a0.json
index e0e191485dc..9fa71ba4c00 100644
--- a/tests/reference/asr-func_03-cd744a0.json
+++ b/tests/reference/asr-func_03-cd744a0.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_03-cd744a0.stderr",
-    "stderr_hash": "d1201fe81d9eeb213996a3f316f463ee4071c9192fb20d7bf327a898",
+    "stderr_hash": "57441cbbd75c2fd973a3287f4766a0cfdec20aaa7c53099c2496e06c",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_03-cd744a0.stderr b/tests/reference/asr-func_03-cd744a0.stderr
index 74251ce6c77..58435b7310d 100644
--- a/tests/reference/asr-func_03-cd744a0.stderr
+++ b/tests/reference/asr-func_03-cd744a0.stderr
@@ -3,3 +3,7 @@ semantic error: Assignment to an input function parameter `l` is not allowed
   |
 4 |     l[5] = 5
   |     ^ Use InOut[list[i32]] to allow assignment
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_04-eef2656.json b/tests/reference/asr-func_04-eef2656.json
index 6fa82a60098..92f45dc2723 100644
--- a/tests/reference/asr-func_04-eef2656.json
+++ b/tests/reference/asr-func_04-eef2656.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_04-eef2656.stderr",
-    "stderr_hash": "d1e5bb4b5356e57124ff34eea9e5b96ecc44d3bc8a1da4b0a7db5b4a",
+    "stderr_hash": "e825889cde0d7fc3a1063aa39cb83348ac45de675aac96bdee345922",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_04-eef2656.stderr b/tests/reference/asr-func_04-eef2656.stderr
index 744b9460d28..98e45a08a61 100644
--- a/tests/reference/asr-func_04-eef2656.stderr
+++ b/tests/reference/asr-func_04-eef2656.stderr
@@ -3,3 +3,7 @@ semantic error: Modifying input function parameter `l` is not allowed
   |
 4 |     l.append(5)
   |     ^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_05-c22b921.json b/tests/reference/asr-func_05-c22b921.json
index 46cec1c7b4e..c94d4aa57bc 100644
--- a/tests/reference/asr-func_05-c22b921.json
+++ b/tests/reference/asr-func_05-c22b921.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_05-c22b921.stderr",
-    "stderr_hash": "9611beb75ae308f86e573592164c5aca50c4e1acec2e91e48687ba96",
+    "stderr_hash": "fbd965b2751f10ff6030d018c89ad3dc973eb78ec48eeb7e25691783",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_05-c22b921.stderr b/tests/reference/asr-func_05-c22b921.stderr
index fc959f032f8..387238b81ec 100644
--- a/tests/reference/asr-func_05-c22b921.stderr
+++ b/tests/reference/asr-func_05-c22b921.stderr
@@ -3,3 +3,7 @@ semantic error: Simple Type i32 cannot be intent InOut/Out
   |
 3 | def f(n: InOut[i32]):
   |       ^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_06-62e738c.json b/tests/reference/asr-func_06-62e738c.json
index 00d0a1051b3..c3070c8f4b7 100644
--- a/tests/reference/asr-func_06-62e738c.json
+++ b/tests/reference/asr-func_06-62e738c.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_06-62e738c.stderr",
-    "stderr_hash": "a97e6d8f812ec9e81cb4b0565dc2fd30f3bd194ccab41770962f6e32",
+    "stderr_hash": "c722c52c0fe4d3c5bfd12cdf3e06b06e680625f4419fd9b436938b46",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_06-62e738c.stderr b/tests/reference/asr-func_06-62e738c.stderr
index 5e5827b2265..6c7a5d3e511 100644
--- a/tests/reference/asr-func_06-62e738c.stderr
+++ b/tests/reference/asr-func_06-62e738c.stderr
@@ -6,3 +6,7 @@ semantic error: Parameter is already declared
   |
 1 | def init_X(m:i32, n: i32, b: CPtr, m: i32) -> None:
   |                                    ^^^^^^ redeclaration
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_07-4a8c076.json b/tests/reference/asr-func_07-4a8c076.json
index 23a3ff6d218..2ca81c01c6e 100644
--- a/tests/reference/asr-func_07-4a8c076.json
+++ b/tests/reference/asr-func_07-4a8c076.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_07-4a8c076.stderr",
-    "stderr_hash": "7ed110581f050d55b95ace1c09b3dc30176b30213c125e3ec19f5c68",
+    "stderr_hash": "749dd900726424e74f4f02048024407e61cc77bda589298e23f8857a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_07-4a8c076.stderr b/tests/reference/asr-func_07-4a8c076.stderr
index d876637cc3e..bf62b009a18 100644
--- a/tests/reference/asr-func_07-4a8c076.stderr
+++ b/tests/reference/asr-func_07-4a8c076.stderr
@@ -3,3 +3,7 @@ semantic error: Assignment to an input function parameter `this` is not allowed
    |
 12 |     this._len = len(this._buf)
    |     ^^^^ Use InOut[struct StringIO] to allow assignment
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_08-c137415.json b/tests/reference/asr-func_08-c137415.json
index e8987fe7e0d..eba162c0c34 100644
--- a/tests/reference/asr-func_08-c137415.json
+++ b/tests/reference/asr-func_08-c137415.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-func_08-c137415.stderr",
-    "stderr_hash": "5fe28460d4f28e79ced8c17e75ba6da4cdfccd36e20d1c3a85d07cf1",
+    "stderr_hash": "cec3ab3b772b374fbc85494ed18310b04bd75ebe14390bf7f0071792",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-func_08-c137415.stderr b/tests/reference/asr-func_08-c137415.stderr
index c372ea27ddc..4408cbbeac4 100644
--- a/tests/reference/asr-func_08-c137415.stderr
+++ b/tests/reference/asr-func_08-c137415.stderr
@@ -3,3 +3,7 @@ semantic error: Intent annotation 'In' cannot be used here
   |
 3 | def main0(x: In[In[i32]]):
   |                 ^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-func_inline_01-56af272.json b/tests/reference/asr-func_inline_01-56af272.json
index 7c32b6b3717..45c753a0ae6 100644
--- a/tests/reference/asr-func_inline_01-56af272.json
+++ b/tests/reference/asr-func_inline_01-56af272.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-func_inline_01-56af272.stdout",
-    "stdout_hash": "dbb86e1cbe4e62cc86aefee1b8654130b8025e892913d824628ca7e8",
+    "stdout_hash": "7f68a8f56a9391784af374552ec602e3f935f99e20257ea3dd08ec8e",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-func_inline_01-56af272.stdout b/tests/reference/asr-func_inline_01-56af272.stdout
index be6554a7ec4..d39cede0f2c 100644
--- a/tests/reference/asr-func_inline_01-56af272.stdout
+++ b/tests/reference/asr-func_inline_01-56af272.stdout
@@ -111,7 +111,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 3 _lpython_return_variable)
                                             (Var 3 n)
                                             ()
@@ -119,7 +119,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerBinOp
                                             (FunctionCall
@@ -228,7 +228,7 @@
                                     )
                                     [fib]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (Cast
                                             (IntegerConstant 40 (Integer 4))
@@ -238,7 +238,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 ans)
                                         (FunctionCall
                                             2 fib
diff --git a/tests/reference/asr-generics_01-d616074.json b/tests/reference/asr-generics_01-d616074.json
index 33a28845c85..54d83bd3023 100644
--- a/tests/reference/asr-generics_01-d616074.json
+++ b/tests/reference/asr-generics_01-d616074.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-generics_01-d616074.stdout",
-    "stdout_hash": "a7de6a75a240c17b33268eadb9f7f7002885ea8d3c3351723e97ef95",
+    "stdout_hash": "105b00adca1fb9bd10c1202f83bf20e649aecab7577b30eeecc643b5",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-generics_01-d616074.stdout b/tests/reference/asr-generics_01-d616074.stdout
index cf6b3b0e85f..36a7950e127 100644
--- a/tests/reference/asr-generics_01-d616074.stdout
+++ b/tests/reference/asr-generics_01-d616074.stdout
@@ -98,7 +98,7 @@
                                     [add_integer]
                                     [(Var 7 x)
                                     (Var 7 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 7 _lpython_return_variable)
                                         (FunctionCall
                                             2 add_integer
@@ -191,7 +191,7 @@
                                     [add_string]
                                     [(Var 8 x)
                                     (Var 8 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 8 _lpython_return_variable)
                                         (FunctionCall
                                             2 add_string
@@ -458,7 +458,7 @@
                                     []
                                     [(Var 4 x)
                                     (Var 4 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 4 x)
@@ -549,7 +549,7 @@
                                     []
                                     [(Var 5 x)
                                     (Var 5 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 5 _lpython_return_variable)
                                         (StringConcat
                                             (Var 5 x)
@@ -651,7 +651,7 @@
                                     [add]
                                     [(Var 6 x)
                                     (Var 6 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 6 _lpython_return_variable)
                                         (FunctionCall
                                             2 add
diff --git a/tests/reference/asr-generics_02-e2ea5c9.json b/tests/reference/asr-generics_02-e2ea5c9.json
index 06369427a07..57525f45bff 100644
--- a/tests/reference/asr-generics_02-e2ea5c9.json
+++ b/tests/reference/asr-generics_02-e2ea5c9.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-generics_02-e2ea5c9.stdout",
-    "stdout_hash": "3168e61664d93355b614ece3ef8eb3f1c128bb225dccb77b163d3ddb",
+    "stdout_hash": "47fea2d8fe6009063e7bbe136cadfaa875168cab41c3e99fbdbe6ba6",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-generics_02-e2ea5c9.stdout b/tests/reference/asr-generics_02-e2ea5c9.stdout
index d319d880f68..8969af86bbe 100644
--- a/tests/reference/asr-generics_02-e2ea5c9.stdout
+++ b/tests/reference/asr-generics_02-e2ea5c9.stdout
@@ -98,17 +98,17 @@
                                     []
                                     [(Var 5 x)
                                     (Var 5 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 5 temp)
                                         (Var 5 x)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 x)
                                         (Var 5 y)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 y)
                                         (Var 5 temp)
                                         ()
@@ -220,12 +220,12 @@
                                     )
                                     [__asr_generic_swap_0]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 a)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
@@ -338,17 +338,17 @@
                                     []
                                     [(Var 3 x)
                                     (Var 3 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 3 temp)
                                         (Var 3 x)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (Var 3 y)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (Var 3 temp)
                                         ()
diff --git a/tests/reference/asr-generics_array_01-682b1b2.json b/tests/reference/asr-generics_array_01-682b1b2.json
index dd75932fa9e..143c21ac42d 100644
--- a/tests/reference/asr-generics_array_01-682b1b2.json
+++ b/tests/reference/asr-generics_array_01-682b1b2.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-generics_array_01-682b1b2.stdout",
-    "stdout_hash": "cb6353bc8d69e50ce353ad96c48aa4c0b04e0f2b0f7a259160d370f8",
+    "stdout_hash": "4a3ccd6b08988a8cf0ec5a84b0751a3381456741a39a642e4a4d0645",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-generics_array_01-682b1b2.stdout b/tests/reference/asr-generics_array_01-682b1b2.stdout
index b63d570847d..6ed081bac37 100644
--- a/tests/reference/asr-generics_array_01-682b1b2.stdout
+++ b/tests/reference/asr-generics_array_01-682b1b2.stdout
@@ -108,7 +108,7 @@
                                     []
                                     [(Var 222 lst)
                                     (Var 222 i)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 222 lst)
                                             [(()
@@ -121,7 +121,7 @@
                                         (Var 222 i)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 222 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 222 lst)
@@ -272,7 +272,7 @@
                                     []
                                     [(Var 220 lst)
                                     (Var 220 i)]
-                                    [(=
+                                    [(Assignment
                                         (ArrayItem
                                             (Var 220 lst)
                                             [(()
@@ -287,7 +287,7 @@
                                         (Var 220 i)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 _lpython_return_variable)
                                         (ArrayItem
                                             (Var 220 lst)
@@ -369,9 +369,9 @@
                                     )
                                     [__asr_generic_f_0]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 221 array)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -379,11 +379,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 x)
                                         (IntegerConstant 69 (Integer 4))
                                         ()
diff --git a/tests/reference/asr-generics_array_02-22c8dc1.json b/tests/reference/asr-generics_array_02-22c8dc1.json
index 3d87a9c0a68..9e60e7d64b8 100644
--- a/tests/reference/asr-generics_array_02-22c8dc1.json
+++ b/tests/reference/asr-generics_array_02-22c8dc1.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-generics_array_02-22c8dc1.stdout",
-    "stdout_hash": "368e1725fa7f7c556d4767ee22d84eaf77d63f5c31382a4c888d923f",
+    "stdout_hash": "a00c87e82f49c6d7141cf1e466dee45855104d910032dca7108a0800",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-generics_array_02-22c8dc1.stdout b/tests/reference/asr-generics_array_02-22c8dc1.stdout
index e60fd705805..7369ba5e047 100644
--- a/tests/reference/asr-generics_array_02-22c8dc1.stdout
+++ b/tests/reference/asr-generics_array_02-22c8dc1.stdout
@@ -165,9 +165,9 @@
                                     [(Var 226 n)
                                     (Var 226 a)
                                     (Var 226 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 226 r)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -175,6 +175,7 @@
                                                 (Var 226 n))]
                                                 PointerToDataArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -191,7 +192,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 226 r)
                                                 [(()
@@ -389,9 +390,9 @@
                                     [(Var 227 n)
                                     (Var 227 a)
                                     (Var 227 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 227 r)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -399,6 +400,7 @@
                                                 (Var 227 n))]
                                                 PointerToDataArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -415,7 +417,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 227 r)
                                                 [(()
@@ -674,7 +676,7 @@
                                     []
                                     [(Var 222 x)
                                     (Var 222 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 222 _lpython_return_variable)
                                         (RealBinOp
                                             (Var 222 x)
@@ -765,7 +767,7 @@
                                     []
                                     [(Var 221 x)
                                     (Var 221 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 221 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 221 x)
@@ -933,9 +935,9 @@
                                     [(Var 223 n)
                                     (Var 223 a)
                                     (Var 223 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 223 r)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (TypeParameter
@@ -945,6 +947,7 @@
                                                 (Var 223 n))]
                                                 PointerToDataArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -961,7 +964,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 223 r)
                                                 [(()
@@ -1137,9 +1140,9 @@
                                     [__asr_generic_g_0
                                     __asr_generic_g_1]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 224 a_int)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -1147,11 +1150,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 a_int)
                                             [(()
@@ -1164,9 +1168,9 @@
                                         (IntegerConstant 400 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 b_int)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -1174,11 +1178,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 b_int)
                                             [(()
@@ -1221,9 +1226,9 @@
                                         ))]
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 a_float)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1231,11 +1236,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 a_float)
                                             [(()
@@ -1259,9 +1265,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 b_float)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1269,11 +1275,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 b_float)
                                             [(()
diff --git a/tests/reference/asr-generics_array_03-fb3706c.json b/tests/reference/asr-generics_array_03-fb3706c.json
index 738e27a51e1..bcfb7bd094c 100644
--- a/tests/reference/asr-generics_array_03-fb3706c.json
+++ b/tests/reference/asr-generics_array_03-fb3706c.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-generics_array_03-fb3706c.stdout",
-    "stdout_hash": "245442c04682e1c18cde44dcc443461526e3ab6ea77983d1f83b275d",
+    "stdout_hash": "486681f34a4ead2b21b8cfd7b048a4e22325a05bddce5167fa40ecd4",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-generics_array_03-fb3706c.stdout b/tests/reference/asr-generics_array_03-fb3706c.stdout
index e3875a867f3..be5def1c26b 100644
--- a/tests/reference/asr-generics_array_03-fb3706c.stdout
+++ b/tests/reference/asr-generics_array_03-fb3706c.stdout
@@ -259,9 +259,9 @@
                                     (Var 227 m)
                                     (Var 227 a)
                                     (Var 227 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 227 r)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -271,6 +271,7 @@
                                                 (Var 227 m))]
                                                 PointerToDataArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -299,7 +300,7 @@
                                                 ()
                                             )
                                             (IntegerConstant 1 (Integer 4)))
-                                            [(=
+                                            [(Assignment
                                                 (ArrayItem
                                                     (Var 227 r)
                                                     [(()
@@ -605,9 +606,9 @@
                                     (Var 228 m)
                                     (Var 228 a)
                                     (Var 228 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 228 r)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -617,6 +618,7 @@
                                                 (Var 228 m))]
                                                 PointerToDataArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -645,7 +647,7 @@
                                                 ()
                                             )
                                             (IntegerConstant 1 (Integer 4)))
-                                            [(=
+                                            [(Assignment
                                                 (ArrayItem
                                                     (Var 228 r)
                                                     [(()
@@ -918,7 +920,7 @@
                                     []
                                     [(Var 222 x)
                                     (Var 222 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 222 _lpython_return_variable)
                                         (RealBinOp
                                             (Var 222 x)
@@ -1009,7 +1011,7 @@
                                     []
                                     [(Var 221 x)
                                     (Var 221 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 221 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 221 x)
@@ -1275,9 +1277,9 @@
                                     (Var 223 m)
                                     (Var 223 a)
                                     (Var 223 b)]
-                                    [(=
+                                    [(Assignment
                                         (Var 223 r)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (TypeParameter
@@ -1289,6 +1291,7 @@
                                                 (Var 223 m))]
                                                 PointerToDataArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1317,7 +1320,7 @@
                                                 ()
                                             )
                                             (IntegerConstant 1 (Integer 4)))
-                                            [(=
+                                            [(Assignment
                                                 (ArrayItem
                                                     (Var 223 r)
                                                     [(()
@@ -1579,9 +1582,9 @@
                                     [__asr_generic_g_0
                                     __asr_generic_g_1]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 224 a_int)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -1591,11 +1594,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 a_int)
                                             [(()
@@ -1611,9 +1615,9 @@
                                         (IntegerConstant 400 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 b_int)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -1623,11 +1627,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 b_int)
                                             [(()
@@ -1643,7 +1648,7 @@
                                         (IntegerConstant 20 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 __lcompilers_dummy)
                                         (FunctionCall
                                             2 __asr_generic_g_0
@@ -1691,9 +1696,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 a_float)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1703,11 +1708,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 a_float)
                                             [(()
@@ -1731,9 +1737,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 b_float)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 4)
@@ -1743,11 +1749,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 b_float)
                                             [(()
@@ -1771,7 +1778,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 224 __lcompilers_dummy1)
                                         (FunctionCall
                                             2 __asr_generic_g_1
diff --git a/tests/reference/asr-generics_error_01-1e05cd6.json b/tests/reference/asr-generics_error_01-1e05cd6.json
index 80dcd03351e..172fa7ff923 100644
--- a/tests/reference/asr-generics_error_01-1e05cd6.json
+++ b/tests/reference/asr-generics_error_01-1e05cd6.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-generics_error_01-1e05cd6.stderr",
-    "stderr_hash": "45a4d8fba734f967b36ed69d703fe503111c67dc6c8887013477c791",
+    "stderr_hash": "7b07678e99da206b5b281821c1d69a5af5eee281e2a4125e77bb04a0",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-generics_error_01-1e05cd6.stderr b/tests/reference/asr-generics_error_01-1e05cd6.stderr
index 9d7abb86ef6..63eaa2873b9 100644
--- a/tests/reference/asr-generics_error_01-1e05cd6.stderr
+++ b/tests/reference/asr-generics_error_01-1e05cd6.stderr
@@ -3,3 +3,7 @@ semantic error: Inconsistent type variable for the function call
    |
 12 | print(f(1,"a"))
    |       ^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-generics_error_02-d614928.json b/tests/reference/asr-generics_error_02-d614928.json
index 950f37b4350..3442d625c14 100644
--- a/tests/reference/asr-generics_error_02-d614928.json
+++ b/tests/reference/asr-generics_error_02-d614928.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-generics_error_02-d614928.stderr",
-    "stderr_hash": "2b82c797067dc1c722d416f8f13d837cfec47a0d4adb11c64f5b7e02",
+    "stderr_hash": "e51d4a53e5f2faa62221e0a4e0b2641664f0b00928f3b0cf60fe2431",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-generics_error_02-d614928.stderr b/tests/reference/asr-generics_error_02-d614928.stderr
index 22668c4d18a..fba61ad28d0 100644
--- a/tests/reference/asr-generics_error_02-d614928.stderr
+++ b/tests/reference/asr-generics_error_02-d614928.stderr
@@ -3,3 +3,7 @@ semantic error: No applicable argument to the restriction zero
    |
 37 | print(mean(["a","b","c"], add=add_string, div=div_string))
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-generics_error_03-208d10d.json b/tests/reference/asr-generics_error_03-208d10d.json
index a5e6b0f0075..8d4e968e7de 100644
--- a/tests/reference/asr-generics_error_03-208d10d.json
+++ b/tests/reference/asr-generics_error_03-208d10d.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-generics_error_03-208d10d.stderr",
-    "stderr_hash": "e4803340775b153d9eafeae36cff39a9469260a0e139f0fc41e9317d",
+    "stderr_hash": "464fbe6f04df56d0e265ce80ca71c90266ca655041ba697aac9e8281",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-generics_error_03-208d10d.stderr b/tests/reference/asr-generics_error_03-208d10d.stderr
index ef155d1bb4b..c8ecc0b4bfa 100644
--- a/tests/reference/asr-generics_error_03-208d10d.stderr
+++ b/tests/reference/asr-generics_error_03-208d10d.stderr
@@ -7,3 +7,7 @@ semantic error: Restriction mismatch with provided arguments
    |
 21 |        return x + y
    | ...^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-generics_list_01-39c4044.json b/tests/reference/asr-generics_list_01-39c4044.json
index e187c1938a8..e03f65ee822 100644
--- a/tests/reference/asr-generics_list_01-39c4044.json
+++ b/tests/reference/asr-generics_list_01-39c4044.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-generics_list_01-39c4044.stdout",
-    "stdout_hash": "8eef1611590df5c815fdf07bf609785edf432da67fce5ff83eded2da",
+    "stdout_hash": "698e7beddad7e18fe72d49fe6f92233771055f842ca1657cfbf49a26",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-generics_list_01-39c4044.stdout b/tests/reference/asr-generics_list_01-39c4044.stdout
index 17a91fe6621..abb4c13e858 100644
--- a/tests/reference/asr-generics_list_01-39c4044.stdout
+++ b/tests/reference/asr-generics_list_01-39c4044.stdout
@@ -136,7 +136,7 @@
                                     add_integer
                                     div_integer]
                                     [(Var 17 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 17 k)
                                         (ListLen
                                             (Var 17 x)
@@ -153,7 +153,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 17 _lpython_return_variable)
                                             (RealConstant
                                                 0.000000
@@ -164,7 +164,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 17 res)
                                         (FunctionCall
                                             2 empty_integer
@@ -193,7 +193,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 17 res)
                                             (FunctionCall
                                                 2 add_integer
@@ -213,7 +213,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 17 _lpython_return_variable)
                                         (FunctionCall
                                             2 div_integer
@@ -344,7 +344,7 @@
                                     add_float
                                     div_float]
                                     [(Var 18 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 18 k)
                                         (ListLen
                                             (Var 18 x)
@@ -361,7 +361,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 18 _lpython_return_variable)
                                             (RealConstant
                                                 0.000000
@@ -372,7 +372,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 18 res)
                                         (FunctionCall
                                             2 empty_float
@@ -401,7 +401,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 18 res)
                                             (FunctionCall
                                                 2 add_float
@@ -421,7 +421,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 18 _lpython_return_variable)
                                         (FunctionCall
                                             2 div_float
@@ -552,7 +552,7 @@
                                     add_string
                                     div_string]
                                     [(Var 19 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 19 k)
                                         (ListLen
                                             (Var 19 x)
@@ -569,7 +569,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 19 _lpython_return_variable)
                                             (RealConstant
                                                 0.000000
@@ -580,7 +580,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 19 res)
                                         (FunctionCall
                                             2 empty_string
@@ -609,7 +609,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 19 res)
                                             (FunctionCall
                                                 2 add_string
@@ -629,7 +629,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 19 _lpython_return_variable)
                                         (FunctionCall
                                             2 div_string
@@ -921,7 +921,7 @@
                                     []
                                     [(Var 10 x)
                                     (Var 10 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 10 _lpython_return_variable)
                                         (RealBinOp
                                             (Var 10 x)
@@ -1012,7 +1012,7 @@
                                     []
                                     [(Var 7 x)
                                     (Var 7 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 7 _lpython_return_variable)
                                         (IntegerBinOp
                                             (Var 7 x)
@@ -1103,7 +1103,7 @@
                                     []
                                     [(Var 13 x)
                                     (Var 13 y)]
-                                    [(=
+                                    [(Assignment
                                         (Var 13 _lpython_return_variable)
                                         (StringConcat
                                             (Var 13 x)
@@ -1277,7 +1277,7 @@
                                     []
                                     [(Var 11 x)
                                     (Var 11 k)]
-                                    [(=
+                                    [(Assignment
                                         (Var 11 _lpython_return_variable)
                                         (RealBinOp
                                             (Var 11 x)
@@ -1373,7 +1373,7 @@
                                     []
                                     [(Var 8 x)
                                     (Var 8 k)]
-                                    [(=
+                                    [(Assignment
                                         (Var 8 _lpython_return_variable)
                                         (RealBinOp
                                             (Cast
@@ -1474,7 +1474,7 @@
                                     []
                                     [(Var 14 x)
                                     (Var 14 k)]
-                                    [(=
+                                    [(Assignment
                                         (Var 14 _lpython_return_variable)
                                         (RealConstant
                                             0.000000
@@ -1544,7 +1544,7 @@
                                     )
                                     []
                                     [(Var 9 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 9 _lpython_return_variable)
                                         (RealConstant
                                             0.000000
@@ -1614,7 +1614,7 @@
                                     )
                                     []
                                     [(Var 6 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 6 _lpython_return_variable)
                                         (IntegerConstant 0 (Integer 4))
                                         ()
@@ -1681,7 +1681,7 @@
                                     )
                                     []
                                     [(Var 12 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 12 _lpython_return_variable)
                                         (StringConstant
                                             ""
@@ -1813,7 +1813,7 @@
                                     add
                                     div]
                                     [(Var 15 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 15 k)
                                         (ListLen
                                             (Var 15 x)
@@ -1830,7 +1830,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 15 _lpython_return_variable)
                                             (RealConstant
                                                 0.000000
@@ -1841,7 +1841,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 15 res)
                                         (FunctionCall
                                             2 zero
@@ -1874,7 +1874,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 15 res)
                                             (FunctionCall
                                                 2 add
@@ -1898,7 +1898,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 15 _lpython_return_variable)
                                         (FunctionCall
                                             2 div
diff --git a/tests/reference/asr-global_scope1-354e217.json b/tests/reference/asr-global_scope1-354e217.json
index 2f529911532..73d652907ec 100644
--- a/tests/reference/asr-global_scope1-354e217.json
+++ b/tests/reference/asr-global_scope1-354e217.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-global_scope1-354e217.stdout",
-    "stdout_hash": "a8135cc1724a7d8f68c2d2136484125b8962b707c21873560dbaa04b",
+    "stdout_hash": "3f8b50cb585b10beb104f627d5b326f8c32669eb57225faf8802d42d",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-global_scope1-354e217.stdout b/tests/reference/asr-global_scope1-354e217.stdout
index 350c3d4b390..32acaf34a52 100644
--- a/tests/reference/asr-global_scope1-354e217.stdout
+++ b/tests/reference/asr-global_scope1-354e217.stdout
@@ -31,7 +31,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 2 i)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
diff --git a/tests/reference/asr-global_syms_01-273906f.json b/tests/reference/asr-global_syms_01-273906f.json
index 223ea28a2cf..7b494e40d02 100644
--- a/tests/reference/asr-global_syms_01-273906f.json
+++ b/tests/reference/asr-global_syms_01-273906f.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-global_syms_01-273906f.stdout",
-    "stdout_hash": "8a038638305efddca192d6bdb758eb4f5c4e701efc7a21e1cdd14a06",
+    "stdout_hash": "43a562bdeaaa407b58e2176609a1c98428b323edf8e098296307f17d",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-global_syms_01-273906f.stdout b/tests/reference/asr-global_syms_01-273906f.stdout
index 317e736a9cf..6f23bbcfb8a 100644
--- a/tests/reference/asr-global_syms_01-273906f.stdout
+++ b/tests/reference/asr-global_syms_01-273906f.stdout
@@ -31,7 +31,7 @@
                                     )
                                     [test_global_symbols]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 2 x)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -42,7 +42,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 2 i)
                                         (ListItem
                                             (Var 2 x)
diff --git a/tests/reference/asr-kwargs_01_error-ab9530d.json b/tests/reference/asr-kwargs_01_error-ab9530d.json
index 6f05aa772da..c698577c404 100644
--- a/tests/reference/asr-kwargs_01_error-ab9530d.json
+++ b/tests/reference/asr-kwargs_01_error-ab9530d.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-kwargs_01_error-ab9530d.stderr",
-    "stderr_hash": "9acb6dea7d63917291858cf2cac49e5270e11ea1dd547f66303224c1",
+    "stderr_hash": "24867b4db379dfa578d709e387d946e3f903e7a0a853ace226ad0b65",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-kwargs_01_error-ab9530d.stderr b/tests/reference/asr-kwargs_01_error-ab9530d.stderr
index dbdf5c98ebd..c2dfe3046c3 100644
--- a/tests/reference/asr-kwargs_01_error-ab9530d.stderr
+++ b/tests/reference/asr-kwargs_01_error-ab9530d.stderr
@@ -3,3 +3,7 @@ semantic error: func01() got multiple values for argument 'a'
    |
 11 |     func01(arg1, a=int(8))
    |     ^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-kwargs_02_error-7c91f8f.json b/tests/reference/asr-kwargs_02_error-7c91f8f.json
index 228d941171b..3ea771dd854 100644
--- a/tests/reference/asr-kwargs_02_error-7c91f8f.json
+++ b/tests/reference/asr-kwargs_02_error-7c91f8f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-kwargs_02_error-7c91f8f.stderr",
-    "stderr_hash": "120e6e6838e464af15ff96aa99dcdda21923a3bb5f0c3d6d7cc8348b",
+    "stderr_hash": "8f22215eb75e71e7d96316df25ebd521c049b99d5d2aa6dd002190bb",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-kwargs_02_error-7c91f8f.stderr b/tests/reference/asr-kwargs_02_error-7c91f8f.stderr
index 9e13b4f43d6..0cc30469a54 100644
--- a/tests/reference/asr-kwargs_02_error-7c91f8f.stderr
+++ b/tests/reference/asr-kwargs_02_error-7c91f8f.stderr
@@ -3,3 +3,7 @@ semantic error: func02() got multiple values for argument 'b'
    |
 13 |     func02(arg3, arg4, c=arg5, b=arg4)
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-kwargs_03_error-a68cc46.json b/tests/reference/asr-kwargs_03_error-a68cc46.json
index 2b3ac444fac..2481218ff44 100644
--- a/tests/reference/asr-kwargs_03_error-a68cc46.json
+++ b/tests/reference/asr-kwargs_03_error-a68cc46.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-kwargs_03_error-a68cc46.stderr",
-    "stderr_hash": "83b858c0d4e17fe2f03b1e47652414c4478d709def5d3fbaa71aad71",
+    "stderr_hash": "561db20270f66b4c16ea6f48d37074b7b9c28b2066fe7b16e01de2f5",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-kwargs_03_error-a68cc46.stderr b/tests/reference/asr-kwargs_03_error-a68cc46.stderr
index 1a811894e01..f10177c1d10 100644
--- a/tests/reference/asr-kwargs_03_error-a68cc46.stderr
+++ b/tests/reference/asr-kwargs_03_error-a68cc46.stderr
@@ -3,3 +3,7 @@ semantic error: Function func01 doesn't have an argument named 'd'
    |
 11 |     func01(arg1, d=int(8))
    |     ^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-lambda_01-1ec3e01.json b/tests/reference/asr-lambda_01-1ec3e01.json
index 31b51267b21..8a6131f63f1 100644
--- a/tests/reference/asr-lambda_01-1ec3e01.json
+++ b/tests/reference/asr-lambda_01-1ec3e01.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-lambda_01-1ec3e01.stderr",
-    "stderr_hash": "99ca916bd82540da6812ad3149c0026c812efdbc777dbb5fb465e868",
+    "stderr_hash": "975faa45b76a2b037f8a1ef5447cab7c66cb91c372264c9e659d1b1b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-lambda_01-1ec3e01.stderr b/tests/reference/asr-lambda_01-1ec3e01.stderr
index 482e01b32e4..6c30feadd7d 100644
--- a/tests/reference/asr-lambda_01-1ec3e01.stderr
+++ b/tests/reference/asr-lambda_01-1ec3e01.stderr
@@ -3,3 +3,7 @@ semantic error: The number of args to lambda function much match the number of a
   |
 5 |     x: Callable[[i32, i32, i32], i32] = lambda p, q, r, s: p +  q + r + s
   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^          ^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-list1-770ba33.json b/tests/reference/asr-list1-770ba33.json
index 9a3720e7216..d8d5a2c116a 100644
--- a/tests/reference/asr-list1-770ba33.json
+++ b/tests/reference/asr-list1-770ba33.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-list1-770ba33.stdout",
-    "stdout_hash": "6b6e9737c184719a7d269490a7fcdfe22f3c1e69d34e20502528f1ac",
+    "stdout_hash": "dc3a2d020a65ea5e96f79b7d8f375f038fd58db7476c9ae8945a6f0a",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-list1-770ba33.stdout b/tests/reference/asr-list1-770ba33.stdout
index 50421675661..69504140d4e 100644
--- a/tests/reference/asr-list1-770ba33.stdout
+++ b/tests/reference/asr-list1-770ba33.stdout
@@ -158,7 +158,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -170,7 +170,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (ListConstant
                                             [(IntegerUnaryMinus
@@ -194,7 +194,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (ListConstant
                                             [(StringConstant
@@ -215,7 +215,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ListConstant
                                             [(ListConstant
@@ -242,7 +242,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d)
                                         (ListItem
                                             (Var 3 a)
@@ -252,7 +252,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 e)
                                         (ListConstant
                                             [(ListConstant
@@ -306,7 +306,7 @@
                                         (IntegerConstant 2 (Integer 4))
                                         (IntegerConstant 13 (Integer 4))
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (ListSection
                                             (Var 3 a)
@@ -320,9 +320,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             ListPop
                                             [(Var 3 a)]
                                             0
@@ -331,9 +331,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d)
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             ListPop
                                             [(Var 3 a)
                                             (IntegerConstant 2 (Integer 4))]
@@ -343,7 +343,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (ListConcat
                                             (Var 3 a)
@@ -361,7 +361,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (ListConcat
                                             (ListConstant
@@ -379,7 +379,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a11)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -390,7 +390,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b11)
                                         (ListConstant
                                             [(IntegerConstant 3 (Integer 4))
diff --git a/tests/reference/asr-loop1-10d3109.json b/tests/reference/asr-loop1-10d3109.json
index fb3b22f4fc1..97921cd58ff 100644
--- a/tests/reference/asr-loop1-10d3109.json
+++ b/tests/reference/asr-loop1-10d3109.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-loop1-10d3109.stdout",
-    "stdout_hash": "35644e13c81c285ced8a8c6c659d9b0ca0f28979414090e71a5a10b3",
+    "stdout_hash": "47d9a15a1f8dc76c5ed5dcb2b417d7b574d766eb2f1611f33e20d17c",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-loop1-10d3109.stdout b/tests/reference/asr-loop1-10d3109.stdout
index 6ca065b60fe..5656399eb48 100644
--- a/tests/reference/asr-loop1-10d3109.stdout
+++ b/tests/reference/asr-loop1-10d3109.stdout
@@ -100,7 +100,7 @@
                                     test_factorial_2
                                     test_factorial_3]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 i)
                                         (FunctionCall
                                             2 test_factorial_1
@@ -112,7 +112,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 i)
                                         (FunctionCall
                                             2 test_factorial_2
@@ -124,7 +124,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 j)
                                         (FunctionCall
                                             2 test_factorial_3
@@ -221,7 +221,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 3 _lpython_return_variable)
                                             (IntegerConstant 0 (Integer 4))
                                             ()
@@ -229,7 +229,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 result)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
@@ -243,7 +243,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 3 result)
                                             (IntegerBinOp
                                                 (Var 3 result)
@@ -254,7 +254,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 3 x)
                                             (IntegerBinOp
                                                 (Var 3 x)
@@ -267,7 +267,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 _lpython_return_variable)
                                         (Var 3 result)
                                         ()
@@ -366,7 +366,7 @@
                                     )
                                     []
                                     [(Var 4 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 result)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
@@ -389,7 +389,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 4 result)
                                             (IntegerBinOp
                                                 (Var 4 result)
@@ -402,7 +402,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 _lpython_return_variable)
                                         (Var 4 result)
                                         ()
@@ -485,7 +485,7 @@
                                     )
                                     []
                                     [(Var 5 x)]
-                                    [(=
+                                    [(Assignment
                                         (Var 5 result)
                                         (Cast
                                             (IntegerConstant 0 (Integer 4))
@@ -503,7 +503,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 5 _lpython_return_variable)
                                             (Var 5 result)
                                             ()
@@ -511,7 +511,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 result)
                                         (Cast
                                             (IntegerConstant 1 (Integer 4))
@@ -530,7 +530,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 5 result)
                                             (IntegerBinOp
                                                 (Var 5 result)
@@ -546,7 +546,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 5 x)
                                             (IntegerBinOp
                                                 (Var 5 x)
@@ -559,7 +559,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 _lpython_return_variable)
                                         (Var 5 result)
                                         ()
diff --git a/tests/reference/asr-loop3-a579196.json b/tests/reference/asr-loop3-a579196.json
index f97f2f7797f..fa0e5972c66 100644
--- a/tests/reference/asr-loop3-a579196.json
+++ b/tests/reference/asr-loop3-a579196.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-loop3-a579196.stdout",
-    "stdout_hash": "33a2b0834fe0ddc68aafecd408b03d67520d2c694a91dd3a3dca6190",
+    "stdout_hash": "15bb8e784ee7d3f408f358dd4a2ad83f3c47a20bd4eea63e3e6a5a0a",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-loop3-a579196.stdout b/tests/reference/asr-loop3-a579196.stdout
index a3461b52069..1b93eba0d16 100644
--- a/tests/reference/asr-loop3-a579196.stdout
+++ b/tests/reference/asr-loop3-a579196.stdout
@@ -46,7 +46,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
diff --git a/tests/reference/asr-loop_01-e7aa06a.json b/tests/reference/asr-loop_01-e7aa06a.json
index 943ce68e649..e7de49253f0 100644
--- a/tests/reference/asr-loop_01-e7aa06a.json
+++ b/tests/reference/asr-loop_01-e7aa06a.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-loop_01-e7aa06a.stderr",
-    "stderr_hash": "256fe74af3480ca97b87c1b6f770cee10753e5f097d5a2d79135e736",
+    "stderr_hash": "f3f662b249a6120f972d246d17d4d23641d86864550fdc9aca18815b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-loop_01-e7aa06a.stderr b/tests/reference/asr-loop_01-e7aa06a.stderr
index 1b50246d4cd..2a69e331627 100644
--- a/tests/reference/asr-loop_01-e7aa06a.stderr
+++ b/tests/reference/asr-loop_01-e7aa06a.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in loop start and loop end values, the types must
   |
 5 |     for i in range(15, i16(-1), i16(-1)):
   |                    ^^  ^^^^^^^ type mismatch ('i32' and 'i16')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-loop_02-5741651.json b/tests/reference/asr-loop_02-5741651.json
index 236ad8ba7a7..9a0ecca15c0 100644
--- a/tests/reference/asr-loop_02-5741651.json
+++ b/tests/reference/asr-loop_02-5741651.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-loop_02-5741651.stderr",
-    "stderr_hash": "a8262496250102a77a9e5718d40aaf1067fb21a18fb047885aa643ac",
+    "stderr_hash": "fa26965e35820f3b13c07269468e892edf68a711e17c6bafb61a726a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-loop_02-5741651.stderr b/tests/reference/asr-loop_02-5741651.stderr
index c9198f2d378..d4f622b8909 100644
--- a/tests/reference/asr-loop_02-5741651.stderr
+++ b/tests/reference/asr-loop_02-5741651.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in loop start and increment values, the types must
   |
 5 |     for i in range(i16(15), i16(-1), -1):
   |                    ^^^^^^^           ^^ type mismatch ('i16' and 'i32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-loop_03-401ab45.json b/tests/reference/asr-loop_03-401ab45.json
index 16313f16a7f..9a78c9e4318 100644
--- a/tests/reference/asr-loop_03-401ab45.json
+++ b/tests/reference/asr-loop_03-401ab45.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-loop_03-401ab45.stderr",
-    "stderr_hash": "cc8945240941626554f3ebeecadc96aa4ee6ea80415352dfefce2786",
+    "stderr_hash": "59d41371ca01bf32c55d25b659c2c8c03947ef8396a96c4c560b9adb",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-loop_03-401ab45.stderr b/tests/reference/asr-loop_03-401ab45.stderr
index f558b6c0fd1..d6109b0da70 100644
--- a/tests/reference/asr-loop_03-401ab45.stderr
+++ b/tests/reference/asr-loop_03-401ab45.stderr
@@ -3,3 +3,7 @@ semantic error: Assignment to loop variable `i` is not allowed
   |
 5 |         i=i*10
   |         ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-modules_02-ec92e6f.json b/tests/reference/asr-modules_02-ec92e6f.json
index 7f73e0678e9..8dc35369ecd 100644
--- a/tests/reference/asr-modules_02-ec92e6f.json
+++ b/tests/reference/asr-modules_02-ec92e6f.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-modules_02-ec92e6f.stdout",
-    "stdout_hash": "35bf9a870b019da27c8c167a499308ae83dba6d9a51c35bebd9aefaf",
+    "stdout_hash": "afb76ea5fdee50af45a64fe9f7b66dd677bf908b4bed08f726437c1e",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-modules_02-ec92e6f.stdout b/tests/reference/asr-modules_02-ec92e6f.stdout
index 8efe4339a5f..1f682f4f69e 100644
--- a/tests/reference/asr-modules_02-ec92e6f.stdout
+++ b/tests/reference/asr-modules_02-ec92e6f.stdout
@@ -92,7 +92,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 7 x)
                                         (IntegerBinOp
                                             (IntegerBinOp
diff --git a/tests/reference/asr-print_02-afbe092.json b/tests/reference/asr-print_02-afbe092.json
index 207c4c7b197..63ff5c7a45f 100644
--- a/tests/reference/asr-print_02-afbe092.json
+++ b/tests/reference/asr-print_02-afbe092.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-print_02-afbe092.stdout",
-    "stdout_hash": "87f67f9b4e20e6e73e94cde1e8aa1ac14b2fbfc76dcd539df67d0773",
+    "stdout_hash": "aae72d26d7d806d7eb476839446f61b55c761da89f69493682c7cd6a",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-print_02-afbe092.stdout b/tests/reference/asr-print_02-afbe092.stdout
index 5fdb7de6f9c..9e4cb586318 100644
--- a/tests/reference/asr-print_02-afbe092.stdout
+++ b/tests/reference/asr-print_02-afbe092.stdout
@@ -195,7 +195,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (ListConstant
                                             [(StringConstant
@@ -216,7 +216,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -229,7 +229,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ListConstant
                                             [(RealConstant
@@ -258,7 +258,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d)
                                         (ListConstant
                                             []
@@ -493,7 +493,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 w)
                                         (ListConstant
                                             [(ListConstant
@@ -582,7 +582,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (ListConstant
                                             [(ListConstant
@@ -669,7 +669,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 y)
                                         (ListConstant
                                             [(ListConstant
@@ -720,7 +720,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (ListConstant
                                             [(ListConstant
@@ -893,7 +893,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 p)
                                         (ListConstant
                                             [(ListConstant
@@ -1054,7 +1054,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 q)
                                         (ListConstant
                                             [(ListConstant
@@ -1877,7 +1877,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 r)
                                         (ListConstant
                                             [(ListConstant
@@ -2698,7 +2698,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 a)
                                         (ListConstant
                                             [(TupleConstant
@@ -2734,7 +2734,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c)
                                         (ListConstant
                                             [(ListConstant
@@ -2808,7 +2808,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b1)
                                         (ListConstant
                                             [(StringConstant
@@ -2837,7 +2837,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b2)
                                         (ListConstant
                                             [(IntegerConstant 10 (Integer 4))
@@ -2850,7 +2850,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (TupleConstant
                                             [(Var 5 b1)
diff --git a/tests/reference/asr-print_list_tuple_03-9de3736.json b/tests/reference/asr-print_list_tuple_03-9de3736.json
index 6b3a0197dd7..857cf48d384 100644
--- a/tests/reference/asr-print_list_tuple_03-9de3736.json
+++ b/tests/reference/asr-print_list_tuple_03-9de3736.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-print_list_tuple_03-9de3736.stdout",
-    "stdout_hash": "8b0ea951eb9a50ad8f74f09e19c152ab04ce401b7f0a4d00a7b4da65",
+    "stdout_hash": "8962f3d49727ceb8f899acc2382f5fb6d24b16506a154ccf907400f5",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-print_list_tuple_03-9de3736.stdout b/tests/reference/asr-print_list_tuple_03-9de3736.stdout
index 5facd0d100b..9e0bc45decd 100644
--- a/tests/reference/asr-print_list_tuple_03-9de3736.stdout
+++ b/tests/reference/asr-print_list_tuple_03-9de3736.stdout
@@ -109,7 +109,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (DictConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -140,7 +140,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (DictConstant
                                             [(IntegerConstant 1 (Integer 4))
diff --git a/tests/reference/asr-set1-b7b913a.json b/tests/reference/asr-set1-b7b913a.json
index 3f8600d01f4..5b961f2c31c 100644
--- a/tests/reference/asr-set1-b7b913a.json
+++ b/tests/reference/asr-set1-b7b913a.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-set1-b7b913a.stdout",
-    "stdout_hash": "5cedd001b9359adb6bbe66fb49cbbcdb2b13fbc5eae198660c91a996",
+    "stdout_hash": "009ae3f3b27fd70cd770e43b62bbda6ac19a03082785cba865c3a8da",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-set1-b7b913a.stdout b/tests/reference/asr-set1-b7b913a.stdout
index ed54f5debe8..6df9463f933 100644
--- a/tests/reference/asr-set1-b7b913a.stdout
+++ b/tests/reference/asr-set1-b7b913a.stdout
@@ -82,7 +82,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (SetConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -94,7 +94,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (SetConstant
                                             [(IntegerConstant 2 (Integer 4))
@@ -109,7 +109,7 @@
                                         ()
                                     )
                                     (Expr
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             SetAdd
                                             [(Var 3 a)
                                             (IntegerConstant 9 (Integer 4))]
@@ -119,7 +119,7 @@
                                         )
                                     )
                                     (Expr
-                                        (IntrinsicScalarFunction
+                                        (IntrinsicElementalFunction
                                             SetRemove
                                             [(Var 3 a)
                                             (IntegerConstant 4 (Integer 4))]
@@ -128,7 +128,7 @@
                                             ()
                                         )
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (SetConstant
                                             [(StringConstant
@@ -149,7 +149,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (SetPop
                                             (Var 3 b)
diff --git a/tests/reference/asr-string_01-78629c4.json b/tests/reference/asr-string_01-78629c4.json
index 8cf78f4a795..31cadebb74b 100644
--- a/tests/reference/asr-string_01-78629c4.json
+++ b/tests/reference/asr-string_01-78629c4.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-string_01-78629c4.stderr",
-    "stderr_hash": "29aa01d7370a20ada91bdb13c569434f36a0c18309700d946d89fbf0",
+    "stderr_hash": "e90b6ecc58069e72ce474308537876fb35c88942113141e361ca78ed",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-string_01-78629c4.stderr b/tests/reference/asr-string_01-78629c4.stderr
index 4abe3b2eb9e..0db273975b5 100644
--- a/tests/reference/asr-string_01-78629c4.stderr
+++ b/tests/reference/asr-string_01-78629c4.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in index, expected a single integer or slice
   |
 3 |     print(x[2, 5])
   |             ^^^^ type mismatch (found: 'tuple[i32, i32]', expected: 'i32' or slice)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-string_02-499c9ff.json b/tests/reference/asr-string_02-499c9ff.json
index ac33dbbf21b..6e4936389fd 100644
--- a/tests/reference/asr-string_02-499c9ff.json
+++ b/tests/reference/asr-string_02-499c9ff.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-string_02-499c9ff.stderr",
-    "stderr_hash": "368ba74a1e0d6609f71e6f87f95bd0b6151420c81336e48a172cb613",
+    "stderr_hash": "a00a7d55c016fde4cac60339fd9e8ea14d7b2049ab26366b699dfee7",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-string_02-499c9ff.stderr b/tests/reference/asr-string_02-499c9ff.stderr
index 196515476bf..f1ca9b7a19c 100644
--- a/tests/reference/asr-string_02-499c9ff.stderr
+++ b/tests/reference/asr-string_02-499c9ff.stderr
@@ -3,3 +3,7 @@ semantic error: str.join() takes type list only
   |
 6 |     res:str = x.join(p)
   |               ^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_01-0893e35.json b/tests/reference/asr-structs_01-0893e35.json
index b415cd4e5b1..1bb3df20bc1 100644
--- a/tests/reference/asr-structs_01-0893e35.json
+++ b/tests/reference/asr-structs_01-0893e35.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_01-0893e35.stderr",
-    "stderr_hash": "6f58b337cbc9cb1832e2ecba47fdad4b64e4484b913e29f61c64dbea",
+    "stderr_hash": "a9e672c827ab451b501313e0b9cdd756a2be77bb1d074c27c4f13e10",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_01-0893e35.stderr b/tests/reference/asr-structs_01-0893e35.stderr
index 12892d04eb4..be8c5853e65 100644
--- a/tests/reference/asr-structs_01-0893e35.stderr
+++ b/tests/reference/asr-structs_01-0893e35.stderr
@@ -3,3 +3,7 @@ semantic error: Alignment 5 is not a positive power of 2.
   |
 3 | @packed(aligned=5)
   |                 ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_01-66dc2c9.json b/tests/reference/asr-structs_01-66dc2c9.json
index d82e944dc93..ab164948f86 100644
--- a/tests/reference/asr-structs_01-66dc2c9.json
+++ b/tests/reference/asr-structs_01-66dc2c9.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_01-66dc2c9.stdout",
-    "stdout_hash": "7996e199fb4e186baf6f87ea3e596a417bcc23ab748eaffa82c89a65",
+    "stdout_hash": "5a32fdd6e6d78976f4d3effbdf4ab79c614eb664a4fd92967ff5d7d7",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_01-66dc2c9.stdout b/tests/reference/asr-structs_01-66dc2c9.stdout
index f93e5776814..afebbfd1711 100644
--- a/tests/reference/asr-structs_01-66dc2c9.stdout
+++ b/tests/reference/asr-structs_01-66dc2c9.stdout
@@ -135,7 +135,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 s)
                                         (StructTypeConstructor
                                             2 S
diff --git a/tests/reference/asr-structs_01-be14d49.json b/tests/reference/asr-structs_01-be14d49.json
index 1a875592ca8..f149ce9e6ee 100644
--- a/tests/reference/asr-structs_01-be14d49.json
+++ b/tests/reference/asr-structs_01-be14d49.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_01-be14d49.stdout",
-    "stdout_hash": "fcb3f3d4edc5f2bc5699c29c299c6188a0feab3f4d4663cc4811f873",
+    "stdout_hash": "6ff17e00a05b231e19396a82ff1a25538d74f39f4df7ccc44abf592c",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_01-be14d49.stdout b/tests/reference/asr-structs_01-be14d49.stdout
index aca7141b128..e96c8d99c9c 100644
--- a/tests/reference/asr-structs_01-be14d49.stdout
+++ b/tests/reference/asr-structs_01-be14d49.stdout
@@ -137,7 +137,7 @@
                                     )
                                     []
                                     [(Var 5 a)]
-                                    [(=
+                                    [(Assignment
                                         (StructInstanceMember
                                             (Var 5 a)
                                             3 x
@@ -158,7 +158,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 5 a)
                                             3 y
@@ -304,7 +304,7 @@
                                     [f
                                     change_struct]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 x)
                                         (StructTypeConstructor
                                             2 A
@@ -372,7 +372,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 6 x)
                                             3 x
@@ -382,7 +382,7 @@
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 6 x)
                                             3 y
diff --git a/tests/reference/asr-structs_02-2ab459a.json b/tests/reference/asr-structs_02-2ab459a.json
index bda3203614b..298b5bc8a2e 100644
--- a/tests/reference/asr-structs_02-2ab459a.json
+++ b/tests/reference/asr-structs_02-2ab459a.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_02-2ab459a.stdout",
-    "stdout_hash": "c21d603fb9e1adaa604b93748b074de1c3a37232656a66bf0159427f",
+    "stdout_hash": "cc9088a5c112c3dd9820ddfb3695cc301e46d853c4f4634fcdb457b6",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_02-2ab459a.stdout b/tests/reference/asr-structs_02-2ab459a.stdout
index ad58cd38c90..00933ce63cf 100644
--- a/tests/reference/asr-structs_02-2ab459a.stdout
+++ b/tests/reference/asr-structs_02-2ab459a.stdout
@@ -203,7 +203,7 @@
                                     )
                                     []
                                     [(Var 4 a)]
-                                    [(=
+                                    [(Assignment
                                         (Var 4 a1)
                                         (StructTypeConstructor
                                             2 A
@@ -227,7 +227,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 a2)
                                         (GetPointer
                                             (Var 4 a1)
@@ -254,7 +254,7 @@
                                         ()
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (StructInstanceMember
                                             (Var 4 a2)
@@ -264,7 +264,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 y)
                                         (StructInstanceMember
                                             (Var 4 a2)
@@ -347,7 +347,7 @@
                                     )
                                     [f]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 b)
                                         (PointerNullConstant
                                             (CPtr)
diff --git a/tests/reference/asr-structs_02-f95782c.json b/tests/reference/asr-structs_02-f95782c.json
index c7ea7537c12..7ba6a456f90 100644
--- a/tests/reference/asr-structs_02-f95782c.json
+++ b/tests/reference/asr-structs_02-f95782c.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_02-f95782c.stderr",
-    "stderr_hash": "832411f3c9770493283e58b9017703a7d1cd178f42a19da6f8a38571",
+    "stderr_hash": "23dae0ded4440f61a29fbe60fe03b6ecd04a5fe040965121c58bc521",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_02-f95782c.stderr b/tests/reference/asr-structs_02-f95782c.stderr
index e087537e578..828fe60c653 100644
--- a/tests/reference/asr-structs_02-f95782c.stderr
+++ b/tests/reference/asr-structs_02-f95782c.stderr
@@ -3,3 +3,7 @@ semantic error: `s` must be initialized with an instance of struct S
   |
 8 |     s: S
   |     ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_03-0cef911.json b/tests/reference/asr-structs_03-0cef911.json
index 05df1612424..4cff33ed980 100644
--- a/tests/reference/asr-structs_03-0cef911.json
+++ b/tests/reference/asr-structs_03-0cef911.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_03-0cef911.stdout",
-    "stdout_hash": "741fc2b3ec3fd31cba6225af186bd835d5f7d2450868a43835658af7",
+    "stdout_hash": "86f4e5e4f8a98068919cc24f5e1add31777cbf511dcc6164587c58e3",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_03-0cef911.stdout b/tests/reference/asr-structs_03-0cef911.stdout
index 94e82fd0a29..5f268f4dde1 100644
--- a/tests/reference/asr-structs_03-0cef911.stdout
+++ b/tests/reference/asr-structs_03-0cef911.stdout
@@ -228,7 +228,7 @@
                                     )
                                     [f]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 x)
                                         (StructTypeConstructor
                                             2 A
@@ -252,7 +252,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 xp)
                                         (GetPointer
                                             (Var 5 x)
@@ -303,7 +303,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 5 xp)
                                             3 x
@@ -313,7 +313,7 @@
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 5 xp)
                                             3 y
diff --git a/tests/reference/asr-structs_03-754fb64.json b/tests/reference/asr-structs_03-754fb64.json
index 70505952609..6977ea00bad 100644
--- a/tests/reference/asr-structs_03-754fb64.json
+++ b/tests/reference/asr-structs_03-754fb64.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_03-754fb64.stderr",
-    "stderr_hash": "c6410f9948863d922cb0a0cd36613c529ad45fdf556d393d36e2df07",
+    "stderr_hash": "04c922b8860a6cb7a09ee1856898b0e41a509f183970c8fe32d36d3e",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_03-754fb64.stderr b/tests/reference/asr-structs_03-754fb64.stderr
index 2a1c1c0d915..0b92ddf3f97 100644
--- a/tests/reference/asr-structs_03-754fb64.stderr
+++ b/tests/reference/asr-structs_03-754fb64.stderr
@@ -3,3 +3,7 @@ semantic error: Member 'y' not found in struct
   |
 8 |     s: S = S(y=2)
   |              ^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_04-387747b.json b/tests/reference/asr-structs_04-387747b.json
index 4a9aaf341a9..d0f8cbec18c 100644
--- a/tests/reference/asr-structs_04-387747b.json
+++ b/tests/reference/asr-structs_04-387747b.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_04-387747b.stdout",
-    "stdout_hash": "86f2c6449a554bd2357cacda5835425b816e406a81ec89f1d82a30e5",
+    "stdout_hash": "27f6a0c804ed3cea5368c4bec54cb4ea35c60215f354d0d91bc24e89",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_04-387747b.stdout b/tests/reference/asr-structs_04-387747b.stdout
index 7ec23ff0c51..32225f2ccf3 100644
--- a/tests/reference/asr-structs_04-387747b.stdout
+++ b/tests/reference/asr-structs_04-387747b.stdout
@@ -395,7 +395,7 @@
                                     )
                                     [f]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 a1)
                                         (StructTypeConstructor
                                             2 A
@@ -419,7 +419,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 a2)
                                         (StructTypeConstructor
                                             2 A
@@ -443,7 +443,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 b)
                                         (StructTypeConstructor
                                             2 B
@@ -456,7 +456,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 6 b)
                                             4 a
@@ -468,7 +468,7 @@
                                         (Var 6 a2)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 6 b)
                                             4 z
@@ -478,7 +478,7 @@
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (StructInstanceMember
                                                 (Var 6 b)
@@ -495,7 +495,7 @@
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (StructInstanceMember
                                                 (Var 6 b)
diff --git a/tests/reference/asr-structs_04-7b864bc.json b/tests/reference/asr-structs_04-7b864bc.json
index c188040d2fc..c27c14dd540 100644
--- a/tests/reference/asr-structs_04-7b864bc.json
+++ b/tests/reference/asr-structs_04-7b864bc.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_04-7b864bc.stderr",
-    "stderr_hash": "e4e04a1a30ae38b6587c4c3ad12a7e83839c63938c025a3884f62ef8",
+    "stderr_hash": "4c41571acfa90c551ece87ea4f5bb429349152d0202131c9b82030b1",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_04-7b864bc.stderr b/tests/reference/asr-structs_04-7b864bc.stderr
index 906b24c6063..7fb9e7da358 100644
--- a/tests/reference/asr-structs_04-7b864bc.stderr
+++ b/tests/reference/asr-structs_04-7b864bc.stderr
@@ -3,3 +3,7 @@ semantic error: S() got multiple values for argument 'x'
   |
 9 |     s: S = S(24, x=2)
   |                  ^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_05-fa98307.json b/tests/reference/asr-structs_05-fa98307.json
index 28944bba0ce..fe7aafaf657 100644
--- a/tests/reference/asr-structs_05-fa98307.json
+++ b/tests/reference/asr-structs_05-fa98307.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_05-fa98307.stdout",
-    "stdout_hash": "f689989b64e70f48af2d09ed0fb1ac3a77050b462d8352ea1f3be08d",
+    "stdout_hash": "8fcc8e26dba2931043ce6b565fcd1f4a4c0d829a095cdae05b4ea020",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_05-fa98307.stdout b/tests/reference/asr-structs_05-fa98307.stdout
index 115c6cf4795..89e491d295c 100644
--- a/tests/reference/asr-structs_05-fa98307.stdout
+++ b/tests/reference/asr-structs_05-fa98307.stdout
@@ -232,9 +232,9 @@
                                     update_1
                                     update_2]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 224 y)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Struct
@@ -244,11 +244,12 @@
                                                 (IntegerConstant 2 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 y)
                                             [(()
@@ -308,7 +309,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 224 y)
                                             [(()
@@ -510,7 +511,7 @@
                                     )
                                     []
                                     [(Var 222 s)]
-                                    [(=
+                                    [(Assignment
                                         (StructInstanceMember
                                             (Var 222 s)
                                             220 x
@@ -520,7 +521,7 @@
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 222 s)
                                             220 y
@@ -533,7 +534,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 222 s)
                                             220 z
@@ -548,7 +549,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 222 s)
                                             220 a
@@ -569,7 +570,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 222 s)
                                             220 b
@@ -584,7 +585,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 222 s)
                                             220 c
@@ -658,7 +659,7 @@
                                     )
                                     []
                                     [(Var 223 s)]
-                                    [(=
+                                    [(Assignment
                                         (StructInstanceMember
                                             (ArrayItem
                                                 (Var 223 s)
@@ -678,7 +679,7 @@
                                         (IntegerConstant 3 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (ArrayItem
                                                 (Var 223 s)
@@ -701,7 +702,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (ArrayItem
                                                 (Var 223 s)
@@ -726,7 +727,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (ArrayItem
                                                 (Var 223 s)
@@ -757,7 +758,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (ArrayItem
                                                 (Var 223 s)
@@ -782,7 +783,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (ArrayItem
                                                 (Var 223 s)
@@ -990,7 +991,7 @@
                                     (Var 221 y1)
                                     (Var 221 x2)
                                     (Var 221 y2)]
-                                    [(=
+                                    [(Assignment
                                         (Var 221 eps)
                                         (RealConstant
                                             0.000000
@@ -998,7 +999,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 s0)
                                         (ArrayItem
                                             (Var 221 s)
@@ -1076,7 +1077,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (StructInstanceMember
@@ -1123,7 +1124,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (StructInstanceMember
@@ -1213,7 +1214,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 s1)
                                         (ArrayItem
                                             (Var 221 s)
@@ -1291,7 +1292,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (StructInstanceMember
@@ -1338,7 +1339,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (StructInstanceMember
diff --git a/tests/reference/asr-structs_06-6e14537.json b/tests/reference/asr-structs_06-6e14537.json
index 7ef7f9dd333..edbdbad4848 100644
--- a/tests/reference/asr-structs_06-6e14537.json
+++ b/tests/reference/asr-structs_06-6e14537.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_06-6e14537.stderr",
-    "stderr_hash": "8e0da9c7e84854ce3d6ad79066a9fbb33d82c9fcde3af2a7baeccec8",
+    "stderr_hash": "1d764cdfc025b24c7e7342924495482196a5e4f701d28728f1e1eb35",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_06-6e14537.stderr b/tests/reference/asr-structs_06-6e14537.stderr
index 55d07bfb5e4..a1206f141f8 100644
--- a/tests/reference/asr-structs_06-6e14537.stderr
+++ b/tests/reference/asr-structs_06-6e14537.stderr
@@ -3,3 +3,7 @@ semantic error: Struct constructor has more arguments than the number of struct
   |
 9 |     s: S = S(2, 3, 4, 5)
   |            ^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_07-83694b7.json b/tests/reference/asr-structs_07-83694b7.json
index 4c07fec19b2..c07086dc839 100644
--- a/tests/reference/asr-structs_07-83694b7.json
+++ b/tests/reference/asr-structs_07-83694b7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_07-83694b7.stderr",
-    "stderr_hash": "6b1e1646f11ee384e5dce1ded0d91751f7113eaea7c90da5c1bcf4ff",
+    "stderr_hash": "59ef2a71632cb112caad8ad64fb801d7ccd8110afa903a4b8e4e231c",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_07-83694b7.stderr b/tests/reference/asr-structs_07-83694b7.stderr
index 13f0aaf0e14..97f6a0607bc 100644
--- a/tests/reference/asr-structs_07-83694b7.stderr
+++ b/tests/reference/asr-structs_07-83694b7.stderr
@@ -3,3 +3,7 @@ semantic error: Not enough arguments to S(), expected 2
   |
 9 |     s: S = S(y=2)
   |            ^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_08-fa4dbf0.json b/tests/reference/asr-structs_08-fa4dbf0.json
index 8f133e95a8d..24caa33a120 100644
--- a/tests/reference/asr-structs_08-fa4dbf0.json
+++ b/tests/reference/asr-structs_08-fa4dbf0.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_08-fa4dbf0.stderr",
-    "stderr_hash": "cf488d893463c941c43080cebb56591bd17c5bed4cb7acd97353d59a",
+    "stderr_hash": "a3f0e2bbd04c07f91b68586eed010d51e42443a819b9a25a3a949bbe",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_08-fa4dbf0.stderr b/tests/reference/asr-structs_08-fa4dbf0.stderr
index 89af7c314cc..be6aea6b15a 100644
--- a/tests/reference/asr-structs_08-fa4dbf0.stderr
+++ b/tests/reference/asr-structs_08-fa4dbf0.stderr
@@ -3,3 +3,7 @@ semantic error: Struct constructor has more arguments than the number of struct
    |
 13 |     test_dude3 : StringIO = StringIO(integer_asr, 3, 5, 2)
    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_09-f3ffe08.json b/tests/reference/asr-structs_09-f3ffe08.json
index 0af164202d7..d5702a74c63 100644
--- a/tests/reference/asr-structs_09-f3ffe08.json
+++ b/tests/reference/asr-structs_09-f3ffe08.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_09-f3ffe08.stderr",
-    "stderr_hash": "f59ab2d213f6423e0a891e43d5a19e83d4405391b1c7bf481b4b939e",
+    "stderr_hash": "295600c377d777d38b373e302e4a35f5bf19fc7f3ce4690039f10926",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_09-f3ffe08.stderr b/tests/reference/asr-structs_09-f3ffe08.stderr
index c7265fdddc1..6fc14bbed24 100644
--- a/tests/reference/asr-structs_09-f3ffe08.stderr
+++ b/tests/reference/asr-structs_09-f3ffe08.stderr
@@ -3,3 +3,7 @@ semantic error: read not present in StringIO dataclass
    |
 13 |     bytes_read: i32 = fd.read()
    |                       ^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_10-cb8a283.json b/tests/reference/asr-structs_10-cb8a283.json
index 6420f7ba943..437839060e6 100644
--- a/tests/reference/asr-structs_10-cb8a283.json
+++ b/tests/reference/asr-structs_10-cb8a283.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_10-cb8a283.stderr",
-    "stderr_hash": "2b88127fdbc0c9e3798569cdfa4ef5745d6fce6aeba8fc3f6a1ace9f",
+    "stderr_hash": "91cddc6a1a589cf46c8fcf65ce9a894fb13906b7000246220b8e73af",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-structs_10-cb8a283.stderr b/tests/reference/asr-structs_10-cb8a283.stderr
index 757e06a54e7..57d9a031d10 100644
--- a/tests/reference/asr-structs_10-cb8a283.stderr
+++ b/tests/reference/asr-structs_10-cb8a283.stderr
@@ -7,3 +7,7 @@ semantic error: Struct member functions are not supported
   |
 8 |            print(self._len)
   | ...^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-structs_16-44de89a.json b/tests/reference/asr-structs_16-44de89a.json
index 76232fcc545..2710b9ad8a4 100644
--- a/tests/reference/asr-structs_16-44de89a.json
+++ b/tests/reference/asr-structs_16-44de89a.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_16-44de89a.stdout",
-    "stdout_hash": "9ebf9426938d92178b3a8fdca450859753b0299d3b2b8cb48272469e",
+    "stdout_hash": "65cfcaf1a3de5bfe7720be9983c0a9ad22d877701f1375eead4ca4b1",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-structs_16-44de89a.stdout b/tests/reference/asr-structs_16-44de89a.stdout
index 3e13df611d4..b98dbfb8e1d 100644
--- a/tests/reference/asr-structs_16-44de89a.stdout
+++ b/tests/reference/asr-structs_16-44de89a.stdout
@@ -213,7 +213,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 bd)
                                         (UnionTypeConstructor
                                             5 A_B
@@ -225,7 +225,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (UnionInstanceMember
                                             (Var 5 bd)
                                             4 x
@@ -235,7 +235,7 @@
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 ad)
                                         (StructTypeConstructor
                                             2 A
diff --git a/tests/reference/asr-subscript1-1acfc19.json b/tests/reference/asr-subscript1-1acfc19.json
index acbacd19731..ccd3be8d224 100644
--- a/tests/reference/asr-subscript1-1acfc19.json
+++ b/tests/reference/asr-subscript1-1acfc19.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-subscript1-1acfc19.stdout",
-    "stdout_hash": "cf02a18790b0e93084fa3adbaebdf78297064cc0575c946d00584151",
+    "stdout_hash": "d7a92e2923edaafb9061c1a2c2739ed3f2b8eaa5bd8bcd8a52e42aec",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-subscript1-1acfc19.stdout b/tests/reference/asr-subscript1-1acfc19.stdout
index 9b615dffe79..5dd12f09526 100644
--- a/tests/reference/asr-subscript1-1acfc19.stdout
+++ b/tests/reference/asr-subscript1-1acfc19.stdout
@@ -104,7 +104,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "abc"
@@ -112,7 +112,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringItem
                                             (Var 3 s)
@@ -128,7 +128,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -140,7 +140,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -152,7 +152,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -168,7 +168,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -180,7 +180,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -192,7 +192,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -208,7 +208,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -224,7 +224,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -248,7 +248,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringSection
                                             (Var 3 s)
@@ -260,7 +260,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (ArrayItem
                                             (Var 3 A)
@@ -273,7 +273,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 B)
                                         (ArraySection
                                             (Var 3 A)
@@ -290,7 +290,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 B)
                                         (ArraySection
                                             (Var 3 A)
diff --git a/tests/reference/asr-test_annassign_01-2f18669.json b/tests/reference/asr-test_annassign_01-2f18669.json
index d300379c587..40a31f47450 100644
--- a/tests/reference/asr-test_annassign_01-2f18669.json
+++ b/tests/reference/asr-test_annassign_01-2f18669.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_annassign_01-2f18669.stderr",
-    "stderr_hash": "28c68e6612db1644548768280ac3d35d3735a13cd32c04da44cec570",
+    "stderr_hash": "1718f84520d91c3fd07fc20164cdc027f1f0a0beeeb2eb034225b7fa",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_annassign_01-2f18669.stderr b/tests/reference/asr-test_annassign_01-2f18669.stderr
index 0f08b0d2447..bf5f7e1633e 100644
--- a/tests/reference/asr-test_annassign_01-2f18669.stderr
+++ b/tests/reference/asr-test_annassign_01-2f18669.stderr
@@ -3,3 +3,7 @@ semantic error: The type 'Optional' is undeclared.
   |
 2 |     a: Optional[i32] = 5
   |        ^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_annassign_02-accf6db.json b/tests/reference/asr-test_annassign_02-accf6db.json
index 6f7c7732788..ddb726d073d 100644
--- a/tests/reference/asr-test_annassign_02-accf6db.json
+++ b/tests/reference/asr-test_annassign_02-accf6db.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_annassign_02-accf6db.stderr",
-    "stderr_hash": "1183fbf06e8412166eb5ca96b5b07cec67382752789a96c7c04c1950",
+    "stderr_hash": "ec335ab50f2f7d0392f13af981bfa42f115e4d9408ab8f06d178e000",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_annassign_02-accf6db.stderr b/tests/reference/asr-test_annassign_02-accf6db.stderr
index 90945d34b2c..3b5deec24de 100644
--- a/tests/reference/asr-test_annassign_02-accf6db.stderr
+++ b/tests/reference/asr-test_annassign_02-accf6db.stderr
@@ -3,3 +3,7 @@ semantic error: The type 'Pattern' is undeclared.
   |
 2 |     hex_pat : Pattern[str] = r'-?0[xX]+'
   |               ^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_annassign_03-f8c6160.json b/tests/reference/asr-test_annassign_03-f8c6160.json
index 43585bc3b4e..610e778f216 100644
--- a/tests/reference/asr-test_annassign_03-f8c6160.json
+++ b/tests/reference/asr-test_annassign_03-f8c6160.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_annassign_03-f8c6160.stderr",
-    "stderr_hash": "e87d692cc8404a7e66f41d61635f318e20003991138c3db5a0794884",
+    "stderr_hash": "90d7421450d9b2250a207a64611593df83c2cb1f42abcd68f2f7a28c",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_annassign_03-f8c6160.stderr b/tests/reference/asr-test_annassign_03-f8c6160.stderr
index 5a89637eb4e..76023fa60a1 100644
--- a/tests/reference/asr-test_annassign_03-f8c6160.stderr
+++ b/tests/reference/asr-test_annassign_03-f8c6160.stderr
@@ -3,3 +3,7 @@ semantic error: Intent annotation 'InOut' cannot be used here
   |
 6 |     lexer : InOut[LasrLexer] = LasrLexer(5)
   |             ^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_annassign_type_mismatch-7dac7be.json b/tests/reference/asr-test_annassign_type_mismatch-7dac7be.json
index b9527150ed7..cc394fccd0a 100644
--- a/tests/reference/asr-test_annassign_type_mismatch-7dac7be.json
+++ b/tests/reference/asr-test_annassign_type_mismatch-7dac7be.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_annassign_type_mismatch-7dac7be.stderr",
-    "stderr_hash": "26fc89f95c7dda5f1d9c3cb1af9843880cf693eb7b97125372b11f80",
+    "stderr_hash": "20447c2ea0541e4706c08811f5ad94788e26d2309c58dd9d7be68c5b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_annassign_type_mismatch-7dac7be.stderr b/tests/reference/asr-test_annassign_type_mismatch-7dac7be.stderr
index 6fd7b199ea1..252510e101a 100644
--- a/tests/reference/asr-test_annassign_type_mismatch-7dac7be.stderr
+++ b/tests/reference/asr-test_annassign_type_mismatch-7dac7be.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 4 |     x: i32[4] = [1, 2, 3, 4]
   |     ^           ^^^^^^^^^^^^ type mismatch ('i32[4]' and 'list[i32]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.json b/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.json
index 2bb48c32ddb..a29980e8457 100644
--- a/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.json
+++ b/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_annassign_type_mismatch2-fc883f7.stderr",
-    "stderr_hash": "873b4521e2155bc92405db41e7745a4fb5441b5d80f94467d7b1b637",
+    "stderr_hash": "23ef251532ca65740ff7f9930ac70a8d55e3b5d71583d9fb50a484c2",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.stderr b/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.stderr
index 2a4f9ccd10b..f1b6e8549bf 100644
--- a/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.stderr
+++ b/tests/reference/asr-test_annassign_type_mismatch2-fc883f7.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 4 |     x: f64[5] = [1.0, 2.0, 3.0, 4.0, 5.0]
   |     ^           ^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch ('f64[5]' and 'list[f64]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_append_type_mismatch-030e9c7.json b/tests/reference/asr-test_append_type_mismatch-030e9c7.json
index e2edd78183a..189cd7175a9 100644
--- a/tests/reference/asr-test_append_type_mismatch-030e9c7.json
+++ b/tests/reference/asr-test_append_type_mismatch-030e9c7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_append_type_mismatch-030e9c7.stderr",
-    "stderr_hash": "6610c87a3c164e9cc8884eaf66397658c311199814689ebd4793c92a",
+    "stderr_hash": "072890a1cc0bd9d287a934f9cee15f632adb8d9e6a21dc7a6de5e083",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_append_type_mismatch-030e9c7.stderr b/tests/reference/asr-test_append_type_mismatch-030e9c7.stderr
index a860db8a46e..efe8389a3a9 100644
--- a/tests/reference/asr-test_append_type_mismatch-030e9c7.stderr
+++ b/tests/reference/asr-test_append_type_mismatch-030e9c7.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in 'append', the types must be compatible
   |
 6 |     l.append('a')
   |              ^^^ type mismatch (found: 'str', expected: 'i32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign1-a94d41e.json b/tests/reference/asr-test_assign1-a94d41e.json
index 35e6aa7403c..955b092944a 100644
--- a/tests/reference/asr-test_assign1-a94d41e.json
+++ b/tests/reference/asr-test_assign1-a94d41e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign1-a94d41e.stderr",
-    "stderr_hash": "cb4455d360373e13730d3a9fd5e2c551bd0f6640d066ceafd8841f9b",
+    "stderr_hash": "2d24538a064229771d963639ad8d83a0cd87a9e1bf778e01514c467b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign1-a94d41e.stderr b/tests/reference/asr-test_assign1-a94d41e.stderr
index abd1f376faf..b76048ad513 100644
--- a/tests/reference/asr-test_assign1-a94d41e.stderr
+++ b/tests/reference/asr-test_assign1-a94d41e.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in assignment, the types must be compatible
   |
 6 |     a = b
   |     ^   ^ type mismatch ('list[i32]' and 'list[str]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign2-fa29029.json b/tests/reference/asr-test_assign2-fa29029.json
index 4603aee52ed..c76a07d9d00 100644
--- a/tests/reference/asr-test_assign2-fa29029.json
+++ b/tests/reference/asr-test_assign2-fa29029.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign2-fa29029.stderr",
-    "stderr_hash": "55f02e505bda066604eb94cec8bdc5081c7ec25e219f0ea46851100a",
+    "stderr_hash": "54fd3e0d2fc60992a9ed6f562befc2c84f67c56e7f28e530e0222940",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign2-fa29029.stderr b/tests/reference/asr-test_assign2-fa29029.stderr
index 6a0fbd1522e..6eed153c3cd 100644
--- a/tests/reference/asr-test_assign2-fa29029.stderr
+++ b/tests/reference/asr-test_assign2-fa29029.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in assignment, the types must be compatible
   |
 6 |     a = b
   |     ^   ^ type mismatch ('set[i32]' and 'set[str]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign3-cc6fc9d.json b/tests/reference/asr-test_assign3-cc6fc9d.json
index 5db5f77a33f..a4666b15899 100644
--- a/tests/reference/asr-test_assign3-cc6fc9d.json
+++ b/tests/reference/asr-test_assign3-cc6fc9d.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign3-cc6fc9d.stderr",
-    "stderr_hash": "cff7850ce5507a70e7c730dd1ff23d16f8839dedac07d5b60a73a8b8",
+    "stderr_hash": "e7f1e8c61e1b449b1768543944d6d584c809a4344c859a124c16e6e2",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign3-cc6fc9d.stderr b/tests/reference/asr-test_assign3-cc6fc9d.stderr
index abec0f4c51a..586f7b0007b 100644
--- a/tests/reference/asr-test_assign3-cc6fc9d.stderr
+++ b/tests/reference/asr-test_assign3-cc6fc9d.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in assignment, the types must be compatible
   |
 6 |     a = b
   |     ^   ^ type mismatch ('list[i32]' and 'set[i32]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign4-a2136e0.json b/tests/reference/asr-test_assign4-a2136e0.json
index e09dfa9249d..0d5114193be 100644
--- a/tests/reference/asr-test_assign4-a2136e0.json
+++ b/tests/reference/asr-test_assign4-a2136e0.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign4-a2136e0.stderr",
-    "stderr_hash": "a871819fb4bd2139f16a7407208ea210276e5b12c9f13ae442132483",
+    "stderr_hash": "396ec086f73ff4e58f5a4817d4d25af3f17ba6f8daaed687ddba51ca",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign4-a2136e0.stderr b/tests/reference/asr-test_assign4-a2136e0.stderr
index 43d32d2933a..7423fbe0562 100644
--- a/tests/reference/asr-test_assign4-a2136e0.stderr
+++ b/tests/reference/asr-test_assign4-a2136e0.stderr
@@ -3,3 +3,7 @@ semantic error: Assigning integer to float is not supported
   |
 7 |     f = x
   |         ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign5-694a98f.json b/tests/reference/asr-test_assign5-694a98f.json
index 312c85ffede..1fafd726327 100644
--- a/tests/reference/asr-test_assign5-694a98f.json
+++ b/tests/reference/asr-test_assign5-694a98f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign5-694a98f.stderr",
-    "stderr_hash": "172b2f13e9b7670cbdd718452713fb15ed4bcd19f6193d328e459fbe",
+    "stderr_hash": "29c2388315bcc4ce0815c7236615f9454b040871b3c7f17181f0ce29",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign5-694a98f.stderr b/tests/reference/asr-test_assign5-694a98f.stderr
index 0847cb828c8..fb465f36617 100644
--- a/tests/reference/asr-test_assign5-694a98f.stderr
+++ b/tests/reference/asr-test_assign5-694a98f.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in assignment, the types must be compatible
   |
 6 |     x = y
   |     ^   ^ type mismatch ('list[list[i32]]' and 'list[list[str]]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign6-05cd64f.json b/tests/reference/asr-test_assign6-05cd64f.json
index 4bab9d78028..5018a9010ca 100644
--- a/tests/reference/asr-test_assign6-05cd64f.json
+++ b/tests/reference/asr-test_assign6-05cd64f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign6-05cd64f.stderr",
-    "stderr_hash": "5bc5e0f7454a31bb924cf1318c59e73da2446502181b92faffd9f5d4",
+    "stderr_hash": "42abe9caaa035ece3f78bb8a09ce0f2af93c46d22fd653f8a1a08d97",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign6-05cd64f.stderr b/tests/reference/asr-test_assign6-05cd64f.stderr
index 3eb1a1d84e8..2ae51327753 100644
--- a/tests/reference/asr-test_assign6-05cd64f.stderr
+++ b/tests/reference/asr-test_assign6-05cd64f.stderr
@@ -3,3 +3,7 @@ semantic error: 'str' object does not support item assignment
   |
 4 |     s[0] = 'f'
   |     ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign7-beebac3.json b/tests/reference/asr-test_assign7-beebac3.json
index e5197e2be8a..a47c2a3f011 100644
--- a/tests/reference/asr-test_assign7-beebac3.json
+++ b/tests/reference/asr-test_assign7-beebac3.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign7-beebac3.stderr",
-    "stderr_hash": "109f7da7ac86c0c2add0ff034655336396cb58ebe81570c1d0ce6e81",
+    "stderr_hash": "d2eeea63021bd9a1db711d5f3c55596ea267f0eaa3f41e4dd0be5b60",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign7-beebac3.stderr b/tests/reference/asr-test_assign7-beebac3.stderr
index 87c04ca9043..c5536c977fe 100644
--- a/tests/reference/asr-test_assign7-beebac3.stderr
+++ b/tests/reference/asr-test_assign7-beebac3.stderr
@@ -3,3 +3,7 @@ semantic error: 'tuple[i32, i32]' object does not support item assignment
   |
 4 |     t[0] = 3
   |     ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign8-4b26e63.json b/tests/reference/asr-test_assign8-4b26e63.json
index fb449632d97..f8c61fdf9db 100644
--- a/tests/reference/asr-test_assign8-4b26e63.json
+++ b/tests/reference/asr-test_assign8-4b26e63.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign8-4b26e63.stderr",
-    "stderr_hash": "c8ad8a6c89a23c0e2bd0cbaf7c9568625f093e526ff8ff26ae300e07",
+    "stderr_hash": "5c161085c4dbb01bb13bf31904286d202d059c13538224710c36eb64",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign8-4b26e63.stderr b/tests/reference/asr-test_assign8-4b26e63.stderr
index dcb47d9356f..6ad3da66ffb 100644
--- a/tests/reference/asr-test_assign8-4b26e63.stderr
+++ b/tests/reference/asr-test_assign8-4b26e63.stderr
@@ -3,3 +3,7 @@ semantic error: readonly attribute
   |
 6 |     c.real = 5.0
   |     ^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_assign9-51278b8.json b/tests/reference/asr-test_assign9-51278b8.json
index 2f05c4e5e51..14cc45e03be 100644
--- a/tests/reference/asr-test_assign9-51278b8.json
+++ b/tests/reference/asr-test_assign9-51278b8.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_assign9-51278b8.stderr",
-    "stderr_hash": "602e4fa615e929bad9586849d2a5167741930e56db6373cdca3695d0",
+    "stderr_hash": "10087e66c7772cea82b88b0d91c3d0ebf868d0a496daf0ae4cba4f42",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_assign9-51278b8.stderr b/tests/reference/asr-test_assign9-51278b8.stderr
index f3c3e9716a6..fc095c6c416 100644
--- a/tests/reference/asr-test_assign9-51278b8.stderr
+++ b/tests/reference/asr-test_assign9-51278b8.stderr
@@ -3,3 +3,7 @@ semantic error: Assignment to an input function parameter `x` is not allowed
   |
 2 |     x = 2
   |     ^ Hint: create a new local variable with a different name
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_async-361297c.json b/tests/reference/asr-test_async-361297c.json
index 4477cbad494..ec6eda63d49 100644
--- a/tests/reference/asr-test_async-361297c.json
+++ b/tests/reference/asr-test_async-361297c.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_async-361297c.stderr",
-    "stderr_hash": "abf614594f89a7a6d93d469d512e31de5adc64feef866957de80cd03",
+    "stderr_hash": "ae75ca7088e02f7f07053d3f249ef0461aa5be03444696bd3afad4be",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_async-361297c.stderr b/tests/reference/asr-test_async-361297c.stderr
index c24b2174aec..4c9b5029853 100644
--- a/tests/reference/asr-test_async-361297c.stderr
+++ b/tests/reference/asr-test_async-361297c.stderr
@@ -7,3 +7,7 @@ semantic error: The `async` keyword is currently not supported
   |
 2 |        print("done")
   | ...^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_binop1-50b63f6.json b/tests/reference/asr-test_binop1-50b63f6.json
index 343aa48bf23..f031e0a0a9b 100644
--- a/tests/reference/asr-test_binop1-50b63f6.json
+++ b/tests/reference/asr-test_binop1-50b63f6.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_binop1-50b63f6.stderr",
-    "stderr_hash": "6883d11d4de52f03fa684252229715e39aa52c830d186f787159faaa",
+    "stderr_hash": "179bd3156d35b9620ab1d611cb6f9b9ba7a2e1732365a68f9cfeacc7",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_binop1-50b63f6.stderr b/tests/reference/asr-test_binop1-50b63f6.stderr
index 67e6ee1aa19..85d3bec5bf9 100644
--- a/tests/reference/asr-test_binop1-50b63f6.stderr
+++ b/tests/reference/asr-test_binop1-50b63f6.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in binary operator; the types must be compatible
   |
 6 |     print(x+s)
   |           ^ ^ type mismatch (i32 and str)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_binop2-e5749af.json b/tests/reference/asr-test_binop2-e5749af.json
index 8de84da8ec8..85e95662d81 100644
--- a/tests/reference/asr-test_binop2-e5749af.json
+++ b/tests/reference/asr-test_binop2-e5749af.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_binop2-e5749af.stderr",
-    "stderr_hash": "3214693e7c1f71d8343f547e7a3ab0167b4f9310540009475d2f1c79",
+    "stderr_hash": "afd4494a9e1f0f2958e68f751a8bc70adf89b47729032c2dcd6a1bf8",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_binop2-e5749af.stderr b/tests/reference/asr-test_binop2-e5749af.stderr
index fe0d054eee9..6d34ed6d904 100644
--- a/tests/reference/asr-test_binop2-e5749af.stderr
+++ b/tests/reference/asr-test_binop2-e5749af.stderr
@@ -3,3 +3,7 @@ semantic error: Division is not supported for string type
   |
 6 |     print(a/b)
   |           ^ ^ string not supported in division
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_binop3-a67201d.json b/tests/reference/asr-test_binop3-a67201d.json
index dc238a62cb7..a160bc4ef87 100644
--- a/tests/reference/asr-test_binop3-a67201d.json
+++ b/tests/reference/asr-test_binop3-a67201d.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_binop3-a67201d.stderr",
-    "stderr_hash": "ff683b1bc0695903f2d2ea7bbd1963346fcb5f84bbfd10a4da0e27d7",
+    "stderr_hash": "0a9565ce5ba341309a0ea2a81b1eed455a4043ee6c824c1465fc3df1",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_binop3-a67201d.stderr b/tests/reference/asr-test_binop3-a67201d.stderr
index 84e374e2f56..68f11ab9dd1 100644
--- a/tests/reference/asr-test_binop3-a67201d.stderr
+++ b/tests/reference/asr-test_binop3-a67201d.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in binary operator; the types must be compatible
   |
 5 |     y = complex(5)+100
   |         ^^^^^^^^^^ ^^^ type mismatch (c32 and i32)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_bit_length-da3a264.json b/tests/reference/asr-test_bit_length-da3a264.json
index 56a237ac34a..b151e00bd0f 100644
--- a/tests/reference/asr-test_bit_length-da3a264.json
+++ b/tests/reference/asr-test_bit_length-da3a264.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_bit_length-da3a264.stderr",
-    "stderr_hash": "0f371300055a9e3f6c01f73b1e276d9ae8007fd507eb0c75e1bda3ef",
+    "stderr_hash": "588be2ebf4b260ff90313b58763bcb37eceab1d0e9cae576851f7182",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_bit_length-da3a264.stderr b/tests/reference/asr-test_bit_length-da3a264.stderr
index 5820f4cd21c..7285aa5d006 100644
--- a/tests/reference/asr-test_bit_length-da3a264.stderr
+++ b/tests/reference/asr-test_bit_length-da3a264.stderr
@@ -3,3 +3,7 @@ semantic error: int.bit_length() takes no arguments
   |
 4 |     print(x.bit_length(23))
   |           ^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_bitwise_on_complex-dd9568b.json b/tests/reference/asr-test_bitwise_on_complex-dd9568b.json
index 7fa9b4be575..b5355e07475 100644
--- a/tests/reference/asr-test_bitwise_on_complex-dd9568b.json
+++ b/tests/reference/asr-test_bitwise_on_complex-dd9568b.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_bitwise_on_complex-dd9568b.stderr",
-    "stderr_hash": "58f7acb7f7187308d38c7c97fcd9e34b2022c42be1b6583b95b379af",
+    "stderr_hash": "964507f47d281484f82f8772ea1ea03c6a0c8d34f0799df86cbbdabe",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_bitwise_on_complex-dd9568b.stderr b/tests/reference/asr-test_bitwise_on_complex-dd9568b.stderr
index 7bb1052707c..8bc5b402d5c 100644
--- a/tests/reference/asr-test_bitwise_on_complex-dd9568b.stderr
+++ b/tests/reference/asr-test_bitwise_on_complex-dd9568b.stderr
@@ -3,3 +3,7 @@ semantic error: Unsupported binary operation on complex: '|'
   |
 8 |     print(c1 | c2)
   |           ^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_bitwise_on_float-2e09b30.json b/tests/reference/asr-test_bitwise_on_float-2e09b30.json
index df6b412bad8..b9e62ed162a 100644
--- a/tests/reference/asr-test_bitwise_on_float-2e09b30.json
+++ b/tests/reference/asr-test_bitwise_on_float-2e09b30.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_bitwise_on_float-2e09b30.stderr",
-    "stderr_hash": "1e77fcf2484ec7c10436c14ac2a498db59706d30d3c294b89b6b9090",
+    "stderr_hash": "bfd9481140ad60fba6aef69dd04bb1e832e0bafaea1041eaa9b91f84",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_bitwise_on_float-2e09b30.stderr b/tests/reference/asr-test_bitwise_on_float-2e09b30.stderr
index d6733722d64..75d5f3149c6 100644
--- a/tests/reference/asr-test_bitwise_on_float-2e09b30.stderr
+++ b/tests/reference/asr-test_bitwise_on_float-2e09b30.stderr
@@ -3,3 +3,7 @@ semantic error: Unsupported binary operation on floats: '<<'
   |
 8 |     print(f1 << f2)
   |           ^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_bool_binop-f856ef0.json b/tests/reference/asr-test_bool_binop-f856ef0.json
index b74825e8d70..f8ed655e505 100644
--- a/tests/reference/asr-test_bool_binop-f856ef0.json
+++ b/tests/reference/asr-test_bool_binop-f856ef0.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_bool_binop-f856ef0.stdout",
-    "stdout_hash": "b2d6b1205576cabc7c44ae611eec55ba5af026dbd918972e05e8f7da",
+    "stdout_hash": "e49cfc7503cc6ab45724e70ede9f036526df9e1e3ac010e6bc484e69",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_bool_binop-f856ef0.stdout b/tests/reference/asr-test_bool_binop-f856ef0.stdout
index f93267c1859..1492774f2b2 100644
--- a/tests/reference/asr-test_bool_binop-f856ef0.stdout
+++ b/tests/reference/asr-test_bool_binop-f856ef0.stdout
@@ -130,7 +130,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i)
                                         (IntegerBinOp
                                             (Cast
@@ -167,7 +167,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerBinOp
                                             (Cast
@@ -204,7 +204,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerBinOp
                                             (Cast
@@ -241,10 +241,10 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (Cast
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(LogicalConstant
                                                     .true.
@@ -277,10 +277,10 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (Cast
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(LogicalConstant
                                                     .false.
@@ -313,7 +313,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerBinOp
                                             (Cast
@@ -350,7 +350,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b1)
                                         (LogicalConstant
                                             .false.
@@ -358,7 +358,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b2)
                                         (LogicalConstant
                                             .true.
@@ -366,7 +366,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealBinOp
                                             (Cast
diff --git a/tests/reference/asr-test_builtin-aa64615.json b/tests/reference/asr-test_builtin-aa64615.json
index 045b711861a..c25457bb577 100644
--- a/tests/reference/asr-test_builtin-aa64615.json
+++ b/tests/reference/asr-test_builtin-aa64615.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin-aa64615.stdout",
-    "stdout_hash": "ff6e31c59ee1a4e5c58817bda1a3a152593770a5269929c552fd2d6d",
+    "stdout_hash": "3e43ed1fbc6e4954aa998229650787bdf543f6a6a071f93e89dbdef2",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin-aa64615.stdout b/tests/reference/asr-test_builtin-aa64615.stdout
index fa9b720f48c..33998796ff9 100644
--- a/tests/reference/asr-test_builtin-aa64615.stdout
+++ b/tests/reference/asr-test_builtin-aa64615.stdout
@@ -208,22 +208,22 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 p)
                                         (IntegerConstant 97 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 q)
                                         (IntegerConstant 112 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 r)
                                         (IntegerConstant 10 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 s)
                                         (IntegerConstant 65 (Integer 4))
                                         ()
@@ -264,7 +264,7 @@
                                         ()
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 a)
                                         (StringConstant
                                             "!"
@@ -272,7 +272,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (StringConstant
                                             " "
@@ -280,7 +280,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c)
                                         (StringConstant
                                             "Z"
@@ -288,7 +288,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 d)
                                         (StringConstant
                                             "g"
@@ -585,12 +585,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 i)
                                         (IntegerConstant 33 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 exclamation)
                                         (StringChr
                                             (Var 4 i)
@@ -635,12 +635,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 36 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 dollar)
                                         (StringChr
                                             (Var 4 i)
@@ -685,12 +685,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 40 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 left_parenthesis)
                                         (StringChr
                                             (Var 4 i)
@@ -735,12 +735,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 43 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 plus)
                                         (StringChr
                                             (Var 4 i)
@@ -785,12 +785,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 48 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 zero)
                                         (StringChr
                                             (Var 4 i)
@@ -835,12 +835,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 57 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 nine)
                                         (StringChr
                                             (Var 4 i)
@@ -885,12 +885,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 59 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 semicolon)
                                         (StringChr
                                             (Var 4 i)
@@ -935,12 +935,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 65 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 capital_a)
                                         (StringChr
                                             (Var 4 i)
@@ -985,12 +985,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 90 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 capital_z)
                                         (StringChr
                                             (Var 4 i)
@@ -1035,12 +1035,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 93 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 right_bracket)
                                         (StringChr
                                             (Var 4 i)
@@ -1085,12 +1085,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 97 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 small_a)
                                         (StringChr
                                             (Var 4 i)
@@ -1135,12 +1135,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 122 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 small_z)
                                         (StringChr
                                             (Var 4 i)
@@ -1185,12 +1185,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i)
                                         (IntegerConstant 125 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 right_brace)
                                         (StringChr
                                             (Var 4 i)
@@ -1488,7 +1488,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "!"
@@ -1496,7 +1496,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 exclamation_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1535,7 +1535,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "$"
@@ -1543,7 +1543,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 dollar_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1582,7 +1582,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "("
@@ -1590,7 +1590,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 left_parenthesis_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1629,7 +1629,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "+"
@@ -1637,7 +1637,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 plus_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1676,7 +1676,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "0"
@@ -1684,7 +1684,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 zero_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1723,7 +1723,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "9"
@@ -1731,7 +1731,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 nine_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1770,7 +1770,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             ";"
@@ -1778,7 +1778,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 semicolon_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1817,7 +1817,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "A"
@@ -1825,7 +1825,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 capital_a_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1864,7 +1864,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "Z"
@@ -1872,7 +1872,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 capital_z_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1911,7 +1911,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "]"
@@ -1919,7 +1919,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 right_bracket_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -1958,7 +1958,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "a"
@@ -1966,7 +1966,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 small_a_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -2005,7 +2005,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "z"
@@ -2013,7 +2013,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 small_z_unicode)
                                         (StringOrd
                                             (Var 3 s)
@@ -2052,7 +2052,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "}"
@@ -2060,7 +2060,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 right_brace_unicode)
                                         (StringOrd
                                             (Var 3 s)
diff --git a/tests/reference/asr-test_builtin_abs-c74d2c9.json b/tests/reference/asr-test_builtin_abs-c74d2c9.json
index ce0899d23be..1a1a9753c8d 100644
--- a/tests/reference/asr-test_builtin_abs-c74d2c9.json
+++ b/tests/reference/asr-test_builtin_abs-c74d2c9.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_abs-c74d2c9.stdout",
-    "stdout_hash": "86d0821d3e240a6645d0f7778a81076160e627a1e8a61e4b2c9056b3",
+    "stdout_hash": "ee62300be1542cd9be250a10d8e904d206894fc6d9031c9d1752a2c4",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_abs-c74d2c9.stdout b/tests/reference/asr-test_builtin_abs-c74d2c9.stdout
index 45fc58f6b98..4d2bd81d589 100644
--- a/tests/reference/asr-test_builtin_abs-c74d2c9.stdout
+++ b/tests/reference/asr-test_builtin_abs-c74d2c9.stdout
@@ -178,7 +178,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (RealConstant
                                             5.500000
@@ -188,7 +188,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 x)]
                                                 0
@@ -205,7 +205,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (RealUnaryMinus
                                             (RealConstant
@@ -222,7 +222,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 x)]
                                                 0
@@ -241,7 +241,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealConstant
                                                     5.500000
@@ -269,7 +269,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealUnaryMinus
                                                     (RealConstant
@@ -302,7 +302,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x2)
                                         (RealUnaryMinus
                                             (Cast
@@ -327,7 +327,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 x2)]
                                                 0
@@ -352,7 +352,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 5 (Integer 4))
@@ -363,7 +363,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 i)]
                                                 0
@@ -379,7 +379,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(IntegerUnaryMinus
                                                     (IntegerConstant 1 (Integer 4))
@@ -400,7 +400,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -416,7 +416,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 i2)]
                                                 0
@@ -435,7 +435,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i3)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -451,7 +451,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 i3)]
                                                 0
@@ -470,7 +470,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i4)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -486,7 +486,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Var 3 i4)]
                                                 0
@@ -505,7 +505,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .true.
@@ -515,7 +515,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Cast
                                                     (Var 3 b)
@@ -534,7 +534,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .false.
@@ -544,7 +544,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(Cast
                                                     (Var 3 b)
diff --git a/tests/reference/asr-test_builtin_bin-52ba9fa.json b/tests/reference/asr-test_builtin_bin-52ba9fa.json
index 80e844ac579..543f42e831b 100644
--- a/tests/reference/asr-test_builtin_bin-52ba9fa.json
+++ b/tests/reference/asr-test_builtin_bin-52ba9fa.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_bin-52ba9fa.stdout",
-    "stdout_hash": "be51d8466bb796401961ebaba18dc3274a4e107f1a9b2047778a16c0",
+    "stdout_hash": "0e232d24c751c39c76219b271d037fb44367b2019443abec83aec30e",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_bin-52ba9fa.stdout b/tests/reference/asr-test_builtin_bin-52ba9fa.stdout
index 3e4a8a8c6d0..8eb9d596533 100644
--- a/tests/reference/asr-test_builtin_bin-52ba9fa.stdout
+++ b/tests/reference/asr-test_builtin_bin-52ba9fa.stdout
@@ -92,7 +92,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
@@ -117,7 +117,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerConstant 64 (Integer 4))
                                         ()
@@ -142,7 +142,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 534 (Integer 4))
diff --git a/tests/reference/asr-test_builtin_bool-330223a.json b/tests/reference/asr-test_builtin_bool-330223a.json
index 9cc04790f87..bd50f826e0c 100644
--- a/tests/reference/asr-test_builtin_bool-330223a.json
+++ b/tests/reference/asr-test_builtin_bool-330223a.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_bool-330223a.stdout",
-    "stdout_hash": "a3c583c97286a6bcd315d229b5beeb35dccf75adc147acb25a7ee3c9",
+    "stdout_hash": "4595de8f8735987408fc6ab8e2829186790e50baebba18fd9ced22d5",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_bool-330223a.stdout b/tests/reference/asr-test_builtin_bool-330223a.stdout
index 3f23cd6288f..75791f89e61 100644
--- a/tests/reference/asr-test_builtin_bool-330223a.stdout
+++ b/tests/reference/asr-test_builtin_bool-330223a.stdout
@@ -256,7 +256,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 34 (Integer 4))
                                         ()
@@ -270,7 +270,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 0 (Integer 4))
                                         ()
@@ -323,7 +323,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a2)
                                         (Cast
                                             (IntegerConstant 34 (Integer 4))
@@ -342,7 +342,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a3)
                                         (Cast
                                             (IntegerConstant 34 (Integer 4))
@@ -361,7 +361,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a4)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -384,7 +384,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             0.000000
@@ -405,7 +405,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             1.000000
@@ -459,7 +459,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f2)
                                         (RealUnaryMinus
                                             (Cast
@@ -491,7 +491,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f2)
                                         (Cast
                                             (RealConstant
@@ -516,7 +516,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             ""
@@ -537,7 +537,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "str"
@@ -591,7 +591,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .true.
@@ -603,7 +603,7 @@
                                         (Var 3 b)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .false.
@@ -640,7 +640,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (FunctionCall
@@ -675,7 +675,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (Cast
                                             (FunctionCall
@@ -756,7 +756,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c1)
                                         (FunctionCall
                                             3 complex@__lpython_overloaded_13__complex
diff --git a/tests/reference/asr-test_builtin_float-20601dd.json b/tests/reference/asr-test_builtin_float-20601dd.json
index 7b0de8b9c0e..b014b5a23a2 100644
--- a/tests/reference/asr-test_builtin_float-20601dd.json
+++ b/tests/reference/asr-test_builtin_float-20601dd.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_float-20601dd.stdout",
-    "stdout_hash": "30bd7a1456c6e4b74a7c6310f2c49c9593924e9728cdba8151b2c15a",
+    "stdout_hash": "6f0ea985e3f8854f200517d79baa5b8f8a75ce97a664b0de2233f557",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_float-20601dd.stdout b/tests/reference/asr-test_builtin_float-20601dd.stdout
index cee0c2a04c4..49aa8fc9c54 100644
--- a/tests/reference/asr-test_builtin_float-20601dd.stdout
+++ b/tests/reference/asr-test_builtin_float-20601dd.stdout
@@ -130,12 +130,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i)
                                         (IntegerConstant 34 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (Cast
                                             (RealConstant
@@ -212,7 +212,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 4235 (Integer 4))
@@ -431,7 +431,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .true.
@@ -439,7 +439,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f2)
                                         (Cast
                                             (Var 3 b)
@@ -462,7 +462,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .false.
diff --git a/tests/reference/asr-test_builtin_hex-64bd268.json b/tests/reference/asr-test_builtin_hex-64bd268.json
index c3c0b918276..46c4fbebcc4 100644
--- a/tests/reference/asr-test_builtin_hex-64bd268.json
+++ b/tests/reference/asr-test_builtin_hex-64bd268.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_hex-64bd268.stdout",
-    "stdout_hash": "60b7a5942be2da46fb5e7ebec29e6f0e3c8a9fb01257e296ec4af9db",
+    "stdout_hash": "17e08baca9c4ff3b1dc27ddd873a94bea5a11392da51f50b7afac131",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_hex-64bd268.stdout b/tests/reference/asr-test_builtin_hex-64bd268.stdout
index 22f1151820a..af94490790c 100644
--- a/tests/reference/asr-test_builtin_hex-64bd268.stdout
+++ b/tests/reference/asr-test_builtin_hex-64bd268.stdout
@@ -92,7 +92,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i)
                                         (IntegerConstant 34 (Integer 4))
                                         ()
@@ -117,7 +117,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 4235 (Integer 4))
diff --git a/tests/reference/asr-test_builtin_int-8f88fdc.json b/tests/reference/asr-test_builtin_int-8f88fdc.json
index 6a7855513a4..8bde15855d8 100644
--- a/tests/reference/asr-test_builtin_int-8f88fdc.json
+++ b/tests/reference/asr-test_builtin_int-8f88fdc.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_int-8f88fdc.stdout",
-    "stdout_hash": "55a54609eea6ca7af35de1398a437d5ac78a396250ef1c52fe510b07",
+    "stdout_hash": "e3bd369c6e5beb4cb74a685058453f560a534b518a57d066010f7d11",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_int-8f88fdc.stdout b/tests/reference/asr-test_builtin_int-8f88fdc.stdout
index 6239802ef9b..6128a10e660 100644
--- a/tests/reference/asr-test_builtin_int-8f88fdc.stdout
+++ b/tests/reference/asr-test_builtin_int-8f88fdc.stdout
@@ -125,7 +125,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -162,7 +162,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -199,7 +199,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -240,7 +240,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -277,7 +277,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -314,7 +314,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -351,7 +351,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -388,7 +388,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (Cast
@@ -425,7 +425,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (IntegerBinOp
@@ -495,7 +495,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 b)
                                         (IntegerBinOp
                                             (IntegerBinOp
@@ -651,7 +651,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             5.678000
@@ -659,7 +659,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
@@ -702,7 +702,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (Cast
                                             (RealConstant
@@ -776,7 +776,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealUnaryMinus
                                             (RealConstant
diff --git a/tests/reference/asr-test_builtin_len-55b0dec.json b/tests/reference/asr-test_builtin_len-55b0dec.json
index 62b9381b2e0..fb11d4264b9 100644
--- a/tests/reference/asr-test_builtin_len-55b0dec.json
+++ b/tests/reference/asr-test_builtin_len-55b0dec.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_len-55b0dec.stdout",
-    "stdout_hash": "d40259d3cc79bda39299a6ee28fe96593637589eaefc2e565696f626",
+    "stdout_hash": "e3800dde0706bb5dc06f1c7e0bc748780d7af02bf76d28ee05cecfa3",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_len-55b0dec.stdout b/tests/reference/asr-test_builtin_len-55b0dec.stdout
index d9c725e1748..e70ec435932 100644
--- a/tests/reference/asr-test_builtin_len-55b0dec.stdout
+++ b/tests/reference/asr-test_builtin_len-55b0dec.stdout
@@ -242,7 +242,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             "abcd"
@@ -264,7 +264,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (StringConstant
                                             ""
@@ -326,7 +326,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 l)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -353,7 +353,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 l2)
                                         (ListConstant
                                             [(RealConstant
@@ -396,7 +396,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 l3)
                                         (ListConstant
                                             []
@@ -452,7 +452,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 list_len)
                                         (ListLen
                                             (ListConstant
@@ -483,7 +483,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 t)
                                         (TupleConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -517,7 +517,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 t2)
                                         (TupleConstant
                                             [(RealConstant
@@ -564,7 +564,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 t3)
                                         (TupleLen
                                             (TupleConstant
@@ -596,7 +596,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 tmp)
                                         (ListLen
                                             (Var 3 l)
diff --git a/tests/reference/asr-test_builtin_oct-20b9066.json b/tests/reference/asr-test_builtin_oct-20b9066.json
index bfe42d86977..6733a98ad72 100644
--- a/tests/reference/asr-test_builtin_oct-20b9066.json
+++ b/tests/reference/asr-test_builtin_oct-20b9066.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_oct-20b9066.stdout",
-    "stdout_hash": "b523d67bd8d17c176afaa1ec7fe635059d5e87eb46369a7b464535e9",
+    "stdout_hash": "5b198d4f23fc77b239feb4ee72810430a3afd0705c71dad5ce4431fe",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_oct-20b9066.stdout b/tests/reference/asr-test_builtin_oct-20b9066.stdout
index e3fd32959cc..bb52e030f7e 100644
--- a/tests/reference/asr-test_builtin_oct-20b9066.stdout
+++ b/tests/reference/asr-test_builtin_oct-20b9066.stdout
@@ -92,7 +92,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i)
                                         (IntegerConstant 34 (Integer 4))
                                         ()
@@ -117,7 +117,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 4235 (Integer 4))
diff --git a/tests/reference/asr-test_builtin_pow-f02fcda.json b/tests/reference/asr-test_builtin_pow-f02fcda.json
index 1fc183a6385..04b1fdd149b 100644
--- a/tests/reference/asr-test_builtin_pow-f02fcda.json
+++ b/tests/reference/asr-test_builtin_pow-f02fcda.json
@@ -6,8 +6,8 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_pow-f02fcda.stdout",
-    "stdout_hash": "0437ce1453ee48dd1664d03df14c9143e03b170f160664b0fa65fd51",
+    "stdout_hash": "f7419d8aa70e29f98f056a4ef4fbc09582e3b4fc452923f31d8a146c",
     "stderr": "asr-test_builtin_pow-f02fcda.stderr",
-    "stderr_hash": "859ce76c74748f2d32c7eab92cfbba789a78d4cbf5818646b99806ea",
+    "stderr_hash": "c6495babe2f9dc8ec8cdc1e8009ed03c4bca6316839caed43f198e7a",
     "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_builtin_pow-f02fcda.stderr b/tests/reference/asr-test_builtin_pow-f02fcda.stderr
index 5dbb75ad245..f43034705cc 100644
--- a/tests/reference/asr-test_builtin_pow-f02fcda.stderr
+++ b/tests/reference/asr-test_builtin_pow-f02fcda.stderr
@@ -3,3 +3,7 @@ style suggestion: Could have used '**' instead of 'pow'
    |
 11 |     assert i32(pow(a, b)) == 32
    |                ^^^^^^^^^ '**' could be used instead
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_builtin_pow-f02fcda.stdout b/tests/reference/asr-test_builtin_pow-f02fcda.stdout
index 4bf941256f6..7bf4c53a587 100644
--- a/tests/reference/asr-test_builtin_pow-f02fcda.stdout
+++ b/tests/reference/asr-test_builtin_pow-f02fcda.stdout
@@ -504,7 +504,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 eps)
                                         (RealConstant
                                             0.000000
@@ -512,12 +512,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
@@ -545,12 +545,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 6 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerConstant 3 (Integer 4))
                                         ()
@@ -578,12 +578,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerConstant 0 (Integer 4))
                                         ()
@@ -611,12 +611,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 1 (Integer 4))
@@ -625,12 +625,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (IntegerConstant 6 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 4 (Integer 4))
@@ -639,7 +639,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i1)
                                         (Cast
                                             (IntegerConstant 2 (Integer 4))
@@ -649,7 +649,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (Cast
                                             (IntegerConstant 5 (Integer 4))
@@ -687,7 +687,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i1)
                                         (Cast
                                             (IntegerConstant 6 (Integer 4))
@@ -697,7 +697,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -711,7 +711,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f1)
                                         (Cast
                                             (RealBinOp
@@ -749,7 +749,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f2)
                                         (Cast
                                             (RealConstant
@@ -765,7 +765,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 p)
                                         (FunctionCall
                                             3 pow@__lpython_overloaded_2__pow
@@ -778,7 +778,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f1)
                                         (FunctionCall
                                             3 pow@__lpython_overloaded_4__pow
@@ -791,7 +791,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f1)
                                         (FunctionCall
                                             3 pow@__lpython_overloaded_5__pow
@@ -804,7 +804,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b1)
                                         (LogicalConstant
                                             .true.
@@ -812,7 +812,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b2)
                                         (LogicalConstant
                                             .false.
@@ -901,7 +901,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a1)
                                         (RealConstant
                                             4.500000
@@ -909,7 +909,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a2)
                                         (RealConstant
                                             2.300000
@@ -919,7 +919,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -952,7 +952,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -983,12 +983,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 x)
                                         (IntegerConstant 3 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (RealConstant
                                             2.300000
@@ -998,7 +998,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1031,7 +1031,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1064,7 +1064,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1100,7 +1100,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1156,7 +1156,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1212,7 +1212,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1272,7 +1272,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1328,7 +1328,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1376,7 +1376,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1424,7 +1424,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1479,7 +1479,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1524,7 +1524,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1576,7 +1576,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1621,7 +1621,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1695,7 +1695,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -1745,7 +1745,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (Cast
                                             (IntegerConstant 7 (Integer 4))
@@ -1755,7 +1755,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 j)
                                         (Cast
                                             (IntegerConstant 2 (Integer 4))
@@ -1765,7 +1765,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 k)
                                         (Cast
                                             (IntegerConstant 5 (Integer 4))
@@ -1824,7 +1824,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c1)
                                         (Cast
                                             (FunctionCall
@@ -1850,7 +1850,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c1)
                                         (FunctionCall
                                             3 pow@__lpython_overloaded_9__pow
diff --git a/tests/reference/asr-test_builtin_round-7417a21.json b/tests/reference/asr-test_builtin_round-7417a21.json
index d4e3e88078e..f2e151a572a 100644
--- a/tests/reference/asr-test_builtin_round-7417a21.json
+++ b/tests/reference/asr-test_builtin_round-7417a21.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_round-7417a21.stdout",
-    "stdout_hash": "fd3cab85c4f2b8a2edc117191bab4eacb7a01184e9430730fa526b65",
+    "stdout_hash": "7de076823367bb7600448ad028dc18c7fd0b34c6b1ac951fda3c4e44",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_round-7417a21.stdout b/tests/reference/asr-test_builtin_round-7417a21.stdout
index 344e7aca634..44dcb4e118c 100644
--- a/tests/reference/asr-test_builtin_round-7417a21.stdout
+++ b/tests/reference/asr-test_builtin_round-7417a21.stdout
@@ -258,7 +258,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             5.678000
@@ -283,7 +283,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealUnaryMinus
                                             (RealConstant
@@ -319,7 +319,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             44.340000
@@ -344,7 +344,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             0.500000
@@ -369,7 +369,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealUnaryMinus
                                             (RealConstant
@@ -405,7 +405,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f)
                                         (RealConstant
                                             1.500000
@@ -609,7 +609,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 f2)
                                         (Cast
                                             (RealConstant
@@ -642,7 +642,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 5 (Integer 4))
@@ -692,7 +692,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i2)
                                         (Cast
                                             (IntegerConstant 7 (Integer 4))
@@ -724,7 +724,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i3)
                                         (Cast
                                             (IntegerUnaryMinus
@@ -764,7 +764,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i4)
                                         (Cast
                                             (IntegerConstant 0 (Integer 4))
@@ -796,7 +796,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .true.
@@ -821,7 +821,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (LogicalConstant
                                             .false.
diff --git a/tests/reference/asr-test_builtin_str-580e920.json b/tests/reference/asr-test_builtin_str-580e920.json
index 8f94593f260..9c87a89ef2b 100644
--- a/tests/reference/asr-test_builtin_str-580e920.json
+++ b/tests/reference/asr-test_builtin_str-580e920.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_builtin_str-580e920.stdout",
-    "stdout_hash": "ed50db5ad4282dc18715d2ad9c6e7a4d3d0a52e35b65e53e4981af3c",
+    "stdout_hash": "2a7e18b0fbf5d33795b7f729926a8fd750d433081a9998d526c7a1e3",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_builtin_str-580e920.stdout b/tests/reference/asr-test_builtin_str-580e920.stdout
index a1988733e10..20458024b21 100644
--- a/tests/reference/asr-test_builtin_str-580e920.stdout
+++ b/tests/reference/asr-test_builtin_str-580e920.stdout
@@ -167,7 +167,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (IntegerConstant 123 (Integer 4))
                                         ()
@@ -190,7 +190,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (IntegerConstant 12345 (Integer 4))
                                         ()
@@ -213,7 +213,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 12 (Integer 4))
@@ -240,7 +240,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 121212 (Integer 4))
@@ -267,7 +267,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 xx)
                                         (Cast
                                             (RealConstant
@@ -301,7 +301,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 yy)
                                         (RealConstant
                                             12.322234
@@ -327,7 +327,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 bool_t)
                                         (LogicalConstant
                                             .true.
@@ -353,7 +353,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 bool_t)
                                         (LogicalConstant
                                             .false.
@@ -379,7 +379,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 str_t)
                                         (StringConstant
                                             "just a str"
@@ -522,7 +522,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 s)
                                         (StringConstant
                                             "abcde"
@@ -530,7 +530,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 d)
                                         (StringConstant
                                             "edcba"
@@ -538,12 +538,12 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 i)
                                         (IntegerConstant 0 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 __tmp_assign_for_loop)
                                         (StringSection
                                             (Var 6 s)
@@ -575,7 +575,7 @@
                                             ()
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 6 c)
                                             (StringItem
                                                 (Var 6 __tmp_assign_for_loop)
@@ -617,7 +617,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 6 i)
                                             (IntegerBinOp
                                                 (Var 6 i)
@@ -675,7 +675,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 s)
                                         (Cast
                                             (IntegerConstant 356 (Integer 4))
@@ -701,7 +701,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 s)
                                         (Cast
                                             (IntegerUnaryMinus
@@ -1018,7 +1018,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 s)
                                         (StringConstant
                                             "abcdefghijk"
@@ -1026,17 +1026,17 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 start)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 end)
                                         (IntegerConstant 4 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 step)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
diff --git a/tests/reference/asr-test_c_interop_01-e374f43.json b/tests/reference/asr-test_c_interop_01-e374f43.json
index a35f2d0c2b7..719c79eb575 100644
--- a/tests/reference/asr-test_c_interop_01-e374f43.json
+++ b/tests/reference/asr-test_c_interop_01-e374f43.json
@@ -2,11 +2,11 @@
     "basename": "asr-test_c_interop_01-e374f43",
     "cmd": "lpython --show-asr --no-color {infile} -o {outfile}",
     "infile": "tests/../integration_tests/test_c_interop_01.py",
-    "infile_hash": "f5363d49163fefe382a94462e7c305a7938ddcc44c4595f8a0c5bc3f",
+    "infile_hash": "26515894348fdf2eb4b6e2e277127972e5cd91232f06ee78e4d52af6",
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_c_interop_01-e374f43.stdout",
-    "stdout_hash": "54f0e7b627f6a658a8ff7c49f02434b2c7e8393c3c9553a884506837",
+    "stdout_hash": "4efb998838b9227640cf653fe7a403a132a5b12ec1312a119ab76b59",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_c_interop_01-e374f43.stdout b/tests/reference/asr-test_c_interop_01-e374f43.stdout
index cffa869f5b8..2e67b18e22e 100644
--- a/tests/reference/asr-test_c_interop_01-e374f43.stdout
+++ b/tests/reference/asr-test_c_interop_01-e374f43.stdout
@@ -10,7 +10,7 @@
                             __main__global_stmts:
                                 (Function
                                     (SymbolTable
-                                        8
+                                        6
                                         {
                                             
                                         })
@@ -43,166 +43,6 @@
                                     .false.
                                     ()
                                 ),
-                            _lfortran_bgt32:
-                                (Function
-                                    (SymbolTable
-                                        5
-                                        {
-                                            _lpython_return_variable:
-                                                (Variable
-                                                    5
-                                                    _lpython_return_variable
-                                                    []
-                                                    ReturnVar
-                                                    ()
-                                                    ()
-                                                    Default
-                                                    (Integer 4)
-                                                    ()
-                                                    BindC
-                                                    Public
-                                                    Required
-                                                    .false.
-                                                ),
-                                            i:
-                                                (Variable
-                                                    5
-                                                    i
-                                                    []
-                                                    In
-                                                    ()
-                                                    ()
-                                                    Default
-                                                    (Integer 4)
-                                                    ()
-                                                    BindC
-                                                    Public
-                                                    Required
-                                                    .true.
-                                                ),
-                                            j:
-                                                (Variable
-                                                    5
-                                                    j
-                                                    []
-                                                    In
-                                                    ()
-                                                    ()
-                                                    Default
-                                                    (Integer 4)
-                                                    ()
-                                                    BindC
-                                                    Public
-                                                    Required
-                                                    .true.
-                                                )
-                                        })
-                                    _lfortran_bgt32
-                                    (FunctionType
-                                        [(Integer 4)
-                                        (Integer 4)]
-                                        (Integer 4)
-                                        BindC
-                                        Interface
-                                        ()
-                                        .false.
-                                        .false.
-                                        .false.
-                                        .false.
-                                        .false.
-                                        []
-                                        .false.
-                                    )
-                                    []
-                                    [(Var 5 i)
-                                    (Var 5 j)]
-                                    []
-                                    (Var 5 _lpython_return_variable)
-                                    Public
-                                    .false.
-                                    .false.
-                                    ()
-                                ),
-                            _lfortran_bgt64:
-                                (Function
-                                    (SymbolTable
-                                        6
-                                        {
-                                            _lpython_return_variable:
-                                                (Variable
-                                                    6
-                                                    _lpython_return_variable
-                                                    []
-                                                    ReturnVar
-                                                    ()
-                                                    ()
-                                                    Default
-                                                    (Integer 4)
-                                                    ()
-                                                    BindC
-                                                    Public
-                                                    Required
-                                                    .false.
-                                                ),
-                                            i:
-                                                (Variable
-                                                    6
-                                                    i
-                                                    []
-                                                    In
-                                                    ()
-                                                    ()
-                                                    Default
-                                                    (Integer 8)
-                                                    ()
-                                                    BindC
-                                                    Public
-                                                    Required
-                                                    .true.
-                                                ),
-                                            j:
-                                                (Variable
-                                                    6
-                                                    j
-                                                    []
-                                                    In
-                                                    ()
-                                                    ()
-                                                    Default
-                                                    (Integer 8)
-                                                    ()
-                                                    BindC
-                                                    Public
-                                                    Required
-                                                    .true.
-                                                )
-                                        })
-                                    _lfortran_bgt64
-                                    (FunctionType
-                                        [(Integer 8)
-                                        (Integer 8)]
-                                        (Integer 4)
-                                        BindC
-                                        Interface
-                                        ()
-                                        .false.
-                                        .false.
-                                        .false.
-                                        .false.
-                                        .false.
-                                        []
-                                        .false.
-                                    )
-                                    []
-                                    [(Var 6 i)
-                                    (Var 6 j)]
-                                    []
-                                    (Var 6 _lpython_return_variable)
-                                    Public
-                                    .false.
-                                    .false.
-                                    ()
-                                ),
                             _lfortran_dsin:
                                 (Function
                                     (SymbolTable
@@ -330,11 +170,11 @@
                             test_c_callbacks:
                                 (Function
                                     (SymbolTable
-                                        7
+                                        5
                                         {
                                             pi:
                                                 (Variable
-                                                    7
+                                                    5
                                                     pi
                                                     []
                                                     Local
@@ -365,12 +205,10 @@
                                         .false.
                                     )
                                     [_lfortran_dsin
-                                    _lfortran_ssin
-                                    _lfortran_bgt32
-                                    _lfortran_bgt64]
+                                    _lfortran_ssin]
                                     []
-                                    [(=
-                                        (Var 7 pi)
+                                    [(Assignment
+                                        (Var 5 pi)
                                         (RealConstant
                                             3.141593
                                             (Real 8)
@@ -379,13 +217,13 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
                                                         2 _lfortran_dsin
                                                         ()
-                                                        [((Var 7 pi))]
+                                                        [((Var 5 pi))]
                                                         (Real 8)
                                                         ()
                                                         ()
@@ -414,14 +252,14 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
                                                         2 _lfortran_dsin
                                                         ()
                                                         [((RealBinOp
-                                                            (Var 7 pi)
+                                                            (Var 5 pi)
                                                             Div
                                                             (RealConstant
                                                                 2.000000
@@ -458,14 +296,14 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
                                                         2 _lfortran_ssin
                                                         ()
                                                         [((Cast
-                                                            (Var 7 pi)
+                                                            (Var 5 pi)
                                                             RealToReal
                                                             (Real 4)
                                                             ()
@@ -514,7 +352,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (FunctionCall
@@ -522,7 +360,7 @@
                                                         ()
                                                         [((Cast
                                                             (RealBinOp
-                                                                (Var 7 pi)
+                                                                (Var 5 pi)
                                                                 Div
                                                                 (RealConstant
                                                                     2.000000
@@ -576,98 +414,6 @@
                                             ()
                                         )
                                         ()
-                                    )
-                                    (Assert
-                                        (IntegerCompare
-                                            (FunctionCall
-                                                2 _lfortran_bgt32
-                                                ()
-                                                [((IntegerConstant 3 (Integer 4)))
-                                                ((IntegerConstant 4 (Integer 4)))]
-                                                (Integer 4)
-                                                ()
-                                                ()
-                                            )
-                                            Eq
-                                            (IntegerConstant 0 (Integer 4))
-                                            (Logical 4)
-                                            ()
-                                        )
-                                        ()
-                                    )
-                                    (Assert
-                                        (IntegerCompare
-                                            (FunctionCall
-                                                2 _lfortran_bgt32
-                                                ()
-                                                [((IntegerConstant 4 (Integer 4)))
-                                                ((IntegerConstant 3 (Integer 4)))]
-                                                (Integer 4)
-                                                ()
-                                                ()
-                                            )
-                                            Eq
-                                            (IntegerConstant 1 (Integer 4))
-                                            (Logical 4)
-                                            ()
-                                        )
-                                        ()
-                                    )
-                                    (Assert
-                                        (IntegerCompare
-                                            (FunctionCall
-                                                2 _lfortran_bgt64
-                                                ()
-                                                [((Cast
-                                                    (IntegerConstant 3 (Integer 4))
-                                                    IntegerToInteger
-                                                    (Integer 8)
-                                                    (IntegerConstant 3 (Integer 8))
-                                                ))
-                                                ((Cast
-                                                    (IntegerConstant 4 (Integer 4))
-                                                    IntegerToInteger
-                                                    (Integer 8)
-                                                    (IntegerConstant 4 (Integer 8))
-                                                ))]
-                                                (Integer 4)
-                                                ()
-                                                ()
-                                            )
-                                            Eq
-                                            (IntegerConstant 0 (Integer 4))
-                                            (Logical 4)
-                                            ()
-                                        )
-                                        ()
-                                    )
-                                    (Assert
-                                        (IntegerCompare
-                                            (FunctionCall
-                                                2 _lfortran_bgt64
-                                                ()
-                                                [((Cast
-                                                    (IntegerConstant 4 (Integer 4))
-                                                    IntegerToInteger
-                                                    (Integer 8)
-                                                    (IntegerConstant 4 (Integer 8))
-                                                ))
-                                                ((Cast
-                                                    (IntegerConstant 3 (Integer 4))
-                                                    IntegerToInteger
-                                                    (Integer 8)
-                                                    (IntegerConstant 3 (Integer 8))
-                                                ))]
-                                                (Integer 4)
-                                                ()
-                                                ()
-                                            )
-                                            Eq
-                                            (IntegerConstant 1 (Integer 4))
-                                            (Logical 4)
-                                            ()
-                                        )
-                                        ()
                                     )]
                                     ()
                                     Public
@@ -684,11 +430,11 @@
             main_program:
                 (Program
                     (SymbolTable
-                        9
+                        7
                         {
                             __main__global_stmts:
                                 (ExternalSymbol
-                                    9
+                                    7
                                     __main__global_stmts
                                     2 __main__global_stmts
                                     __main__
@@ -700,7 +446,7 @@
                     main_program
                     [__main__]
                     [(SubroutineCall
-                        9 __main__global_stmts
+                        7 __main__global_stmts
                         2 __main__global_stmts
                         []
                         ()
diff --git a/tests/reference/asr-test_chr-91f4987.json b/tests/reference/asr-test_chr-91f4987.json
index ca5829edf99..9ff30498f9d 100644
--- a/tests/reference/asr-test_chr-91f4987.json
+++ b/tests/reference/asr-test_chr-91f4987.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_chr-91f4987.stderr",
-    "stderr_hash": "87fff5dabdc4a4c52a0f07fd59bcc25ba6a3b29a391b39d404b8e2bc",
+    "stderr_hash": "442cc31382f37e87185b3e3ec3f86831ce9f7a64af3a6cd2655d5c7b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_chr-91f4987.stderr b/tests/reference/asr-test_chr-91f4987.stderr
index 18bb9fac873..cb2b893c3ec 100644
--- a/tests/reference/asr-test_chr-91f4987.stderr
+++ b/tests/reference/asr-test_chr-91f4987.stderr
@@ -3,3 +3,7 @@ semantic error: 'f64' object cannot be interpreted as an integer
   |
 3 |     s = chr(973.2)
   |             ^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_compare_01-c594bbe.json b/tests/reference/asr-test_compare_01-c594bbe.json
index 4871c78f6e9..41865c90108 100644
--- a/tests/reference/asr-test_compare_01-c594bbe.json
+++ b/tests/reference/asr-test_compare_01-c594bbe.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_compare_01-c594bbe.stderr",
-    "stderr_hash": "65fb5b04ca1f56cae946ed2db3cde1380d0d9976114c340acfbbcf7b",
+    "stderr_hash": "69befcaa10db643b167dc312a54d62c054d93900a7b05cf23986415c",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_compare_01-c594bbe.stderr b/tests/reference/asr-test_compare_01-c594bbe.stderr
index 868af63d500..efdce31c392 100644
--- a/tests/reference/asr-test_compare_01-c594bbe.stderr
+++ b/tests/reference/asr-test_compare_01-c594bbe.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in comparison operator, the types must be compatib
   |
 6 |     print(i16(x) > f32(y))
   |           ^^^^^^   ^^^^^^ type mismatch ('i16' and 'f32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_compare_02-bf2c76e.json b/tests/reference/asr-test_compare_02-bf2c76e.json
index de5b576dcee..9b3bb6a4e3b 100644
--- a/tests/reference/asr-test_compare_02-bf2c76e.json
+++ b/tests/reference/asr-test_compare_02-bf2c76e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_compare_02-bf2c76e.stderr",
-    "stderr_hash": "b7fd0ded0c7519927e22a838a2b5156d7cb6b3728bb463ecb5907bfd",
+    "stderr_hash": "f37d7d40e45b8e7fd25d963085ff1c0060fc744da76b168ea84d341f",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_compare_02-bf2c76e.stderr b/tests/reference/asr-test_compare_02-bf2c76e.stderr
index a8843ae5eeb..3ddddf6170c 100644
--- a/tests/reference/asr-test_compare_02-bf2c76e.stderr
+++ b/tests/reference/asr-test_compare_02-bf2c76e.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in comparison operator, the types must be compatib
   |
 6 |     print(x > y)
   |           ^   ^ type mismatch ('i32' and 'u32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_complex_01-a6def58.json b/tests/reference/asr-test_complex_01-a6def58.json
index 9a9c3d09dd5..2635b8108b0 100644
--- a/tests/reference/asr-test_complex_01-a6def58.json
+++ b/tests/reference/asr-test_complex_01-a6def58.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_complex_01-a6def58.stdout",
-    "stdout_hash": "82664484d6390ba35085ab89ee7b745015aea93df785c9b5f8c5b865",
+    "stdout_hash": "f27c59a3db1bd0d4623a60d3ceceec2cf5bdef7c72da450a51e90971",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_complex_01-a6def58.stdout b/tests/reference/asr-test_complex_01-a6def58.stdout
index 2d13acac1cf..2f3e0b17f7e 100644
--- a/tests/reference/asr-test_complex_01-a6def58.stdout
+++ b/tests/reference/asr-test_complex_01-a6def58.stdout
@@ -361,7 +361,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_5__complex
@@ -384,7 +384,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 eps)
                                         (RealConstant
                                             0.000000
@@ -394,7 +394,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -423,7 +423,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -450,7 +450,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_9__complex
@@ -473,7 +473,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -509,7 +509,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -536,7 +536,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_13__complex
@@ -558,7 +558,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -587,7 +587,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -614,7 +614,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_14__complex
@@ -636,7 +636,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -665,7 +665,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -692,7 +692,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 a)
                                         (RealConstant
                                             534.600000
@@ -700,7 +700,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_5__complex
@@ -719,7 +719,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -748,7 +748,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -782,7 +782,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 a2)
                                         (RealUnaryMinus
                                             (Cast
@@ -805,7 +805,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 a3)
                                         (Cast
                                             (RealConstant
@@ -821,7 +821,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x2)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_6__complex
@@ -837,7 +837,7 @@
                                     (Assert
                                         (RealCompare
                                             (Cast
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (ComplexIm
@@ -876,7 +876,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i1)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 5 (Integer 4))
@@ -885,7 +885,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 i2)
                                         (IntegerUnaryMinus
                                             (Cast
@@ -899,7 +899,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_7__complex
@@ -912,7 +912,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_8__complex
@@ -925,7 +925,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_11__complex
@@ -938,7 +938,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_9__complex
@@ -955,7 +955,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_10__complex
@@ -976,7 +976,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (FunctionCall
                                             4 complex@__lpython_overloaded_12__complex
@@ -1090,7 +1090,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 c)
                                         (Cast
                                             (FunctionCall
@@ -1116,7 +1116,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 b)
                                         (LogicalNot
                                             (Cast
@@ -1138,7 +1138,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 c2)
                                         (FunctionCall
                                             6 complex@__lpython_overloaded_9__complex
@@ -1155,7 +1155,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 b)
                                         (LogicalNot
                                             (Cast
@@ -1290,7 +1290,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 c)
                                         (Cast
                                             (FunctionCall
@@ -1319,7 +1319,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 _c)
                                         (ComplexUnaryMinus
                                             (Var 5 c)
@@ -1330,7 +1330,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Cast
@@ -1374,7 +1374,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Cast
@@ -1416,7 +1416,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 _c)
                                         (Cast
                                             (FunctionCall
@@ -1446,7 +1446,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 _c)
                                         (ComplexUnaryMinus
                                             (Var 5 _c)
@@ -1457,7 +1457,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Cast
@@ -1501,7 +1501,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Cast
@@ -1536,7 +1536,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c2)
                                         (FunctionCall
                                             5 complex@__lpython_overloaded_5__complex
@@ -1573,7 +1573,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c2)
                                         (ComplexUnaryMinus
                                             (Var 5 c2)
@@ -1584,7 +1584,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -1616,7 +1616,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -1646,7 +1646,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c2)
                                         (ComplexBinOp
                                             (Cast
@@ -1674,7 +1674,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c2)
                                         (ComplexUnaryMinus
                                             (Var 5 c2)
@@ -1685,7 +1685,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexRe
@@ -1724,7 +1724,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ComplexIm
@@ -1854,7 +1854,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (ComplexBinOp
                                             (Cast
@@ -1882,7 +1882,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 eps)
                                         (RealConstant
                                             0.000000
@@ -1890,7 +1890,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a)
                                         (ComplexRe
                                             (Var 3 x)
@@ -1899,7 +1899,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (ComplexIm
                                             (Var 3 x)
@@ -1910,7 +1910,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 3 a)
@@ -1935,7 +1935,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Var 3 b)
diff --git a/tests/reference/asr-test_complex_02-782ba2d.json b/tests/reference/asr-test_complex_02-782ba2d.json
index 716cd6db0da..b88e353f763 100644
--- a/tests/reference/asr-test_complex_02-782ba2d.json
+++ b/tests/reference/asr-test_complex_02-782ba2d.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_complex_02-782ba2d.stdout",
-    "stdout_hash": "8ab7f5cd65918128791225ed99a8fa422d9fc3a1811a1557d587af26",
+    "stdout_hash": "0a3aedd526271c84ad5a03e8ec1ed1d6f1377bf232e18f9297d4ba46",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_complex_02-782ba2d.stdout b/tests/reference/asr-test_complex_02-782ba2d.stdout
index 2a89462be4d..4af04f04c60 100644
--- a/tests/reference/asr-test_complex_02-782ba2d.stdout
+++ b/tests/reference/asr-test_complex_02-782ba2d.stdout
@@ -184,7 +184,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (Cast
                                             (FunctionCall
@@ -210,7 +210,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 eps)
                                         (RealConstant
                                             0.000000
@@ -220,11 +220,11 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (Cast
-                                                        (IntrinsicScalarFunction
+                                                        (IntrinsicElementalFunction
                                                             Abs
                                                             [(Var 3 x)]
                                                             0
@@ -254,7 +254,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (FunctionCall
                                             3 complex@__lpython_overloaded_9__complex
@@ -273,10 +273,10 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
-                                                    (IntrinsicScalarFunction
+                                                    (IntrinsicElementalFunction
                                                         Abs
                                                         [(Var 3 y)]
                                                         0
@@ -379,7 +379,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (Cast
                                             (ComplexBinOp
@@ -416,7 +416,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 y)
                                         (Cast
                                             (ComplexBinOp
@@ -453,7 +453,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (ComplexBinOp
                                             (Var 4 x)
@@ -464,7 +464,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (ComplexBinOp
                                             (Var 4 x)
@@ -475,7 +475,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (ComplexBinOp
                                             (Var 4 x)
@@ -486,7 +486,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (ComplexBinOp
                                             (Var 4 x)
@@ -574,7 +574,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 x)
                                         (ComplexBinOp
                                             (Cast
@@ -602,7 +602,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 y)
                                         (ComplexBinOp
                                             (Cast
@@ -630,7 +630,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 z)
                                         (ComplexBinOp
                                             (Var 5 x)
@@ -641,7 +641,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 z)
                                         (ComplexBinOp
                                             (Var 5 x)
@@ -652,7 +652,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 z)
                                         (ComplexBinOp
                                             (Var 5 x)
@@ -663,7 +663,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 z)
                                         (ComplexBinOp
                                             (Var 5 x)
diff --git a/tests/reference/asr-test_const_list_append-ada1ade.json b/tests/reference/asr-test_const_list_append-ada1ade.json
index 484830324dd..575620a1869 100644
--- a/tests/reference/asr-test_const_list_append-ada1ade.json
+++ b/tests/reference/asr-test_const_list_append-ada1ade.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_const_list_append-ada1ade.stderr",
-    "stderr_hash": "84fe0a7a75edd73700bce92d3e43cdc85e7f3c58f0047f53fb4412ad",
+    "stderr_hash": "e6b99d37416c0ab5200019e594f68f1c175e068d04b241cf08ce881c",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_const_list_append-ada1ade.stderr b/tests/reference/asr-test_const_list_append-ada1ade.stderr
index 08b7bf6c6b6..7b42b483faa 100644
--- a/tests/reference/asr-test_const_list_append-ada1ade.stderr
+++ b/tests/reference/asr-test_const_list_append-ada1ade.stderr
@@ -3,3 +3,7 @@ semantic error: cannot append element to a const list
   |
 7 |     CONST_INTEGER_LIST.append(6)
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_const_list_clear-33bfae7.json b/tests/reference/asr-test_const_list_clear-33bfae7.json
index a4ac6699f74..090e03f4db2 100644
--- a/tests/reference/asr-test_const_list_clear-33bfae7.json
+++ b/tests/reference/asr-test_const_list_clear-33bfae7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_const_list_clear-33bfae7.stderr",
-    "stderr_hash": "5c0c698319211c447c76e3309a027ee068dffded22d87bb3024cedf9",
+    "stderr_hash": "1a4b0b9abd4b00fbab4ae25aab6ed9de79140cfb24c9338f3b9da9c1",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_const_list_clear-33bfae7.stderr b/tests/reference/asr-test_const_list_clear-33bfae7.stderr
index 89fc62b51ae..4aeac716409 100644
--- a/tests/reference/asr-test_const_list_clear-33bfae7.stderr
+++ b/tests/reference/asr-test_const_list_clear-33bfae7.stderr
@@ -3,3 +3,7 @@ semantic error: cannot clear elements from a const list
   |
 7 |     CONST_INTEGER_LIST.clear()
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_const_list_insert-4c81295.json b/tests/reference/asr-test_const_list_insert-4c81295.json
index 6113030e628..68a37135f14 100644
--- a/tests/reference/asr-test_const_list_insert-4c81295.json
+++ b/tests/reference/asr-test_const_list_insert-4c81295.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_const_list_insert-4c81295.stderr",
-    "stderr_hash": "148e2a44028dd423007236ebf7a2c393fcefa4e8c12aad565f1c87fe",
+    "stderr_hash": "6333bcb95fdcb09561fd714b3a0019c5e94a05d7f21079d6a75569f9",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_const_list_insert-4c81295.stderr b/tests/reference/asr-test_const_list_insert-4c81295.stderr
index 0a416adfd36..16c26b033a8 100644
--- a/tests/reference/asr-test_const_list_insert-4c81295.stderr
+++ b/tests/reference/asr-test_const_list_insert-4c81295.stderr
@@ -3,3 +3,7 @@ semantic error: cannot insert element in a const list
   |
 7 |     CONST_INTEGER_LIST.insert(3, 8)
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_const_list_pop-568b207.json b/tests/reference/asr-test_const_list_pop-568b207.json
index eb4e398c999..a7add682f24 100644
--- a/tests/reference/asr-test_const_list_pop-568b207.json
+++ b/tests/reference/asr-test_const_list_pop-568b207.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_const_list_pop-568b207.stderr",
-    "stderr_hash": "32d57cbb983509ca6c54bc0812c9a74b3c1886ecc94e635c5011c378",
+    "stderr_hash": "fd9c42a0a699e0b1ed4404a22b196916494e8d63c8de4f8188fa6180",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_const_list_pop-568b207.stderr b/tests/reference/asr-test_const_list_pop-568b207.stderr
index ad22224de15..f55f17cf096 100644
--- a/tests/reference/asr-test_const_list_pop-568b207.stderr
+++ b/tests/reference/asr-test_const_list_pop-568b207.stderr
@@ -3,3 +3,7 @@ semantic error: cannot pop element from a const list
   |
 7 |     CONST_INTEGER_LIST.pop()
   |     ^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_const_list_remove-c5deb20.json b/tests/reference/asr-test_const_list_remove-c5deb20.json
index 4abd87a66b5..57b3477c4ec 100644
--- a/tests/reference/asr-test_const_list_remove-c5deb20.json
+++ b/tests/reference/asr-test_const_list_remove-c5deb20.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_const_list_remove-c5deb20.stderr",
-    "stderr_hash": "3529d822548d9327dbd0eab32aebc7b4a0da518cc0a6c2356e65c7b8",
+    "stderr_hash": "fdc0593ffd5807da577db67b457e53749498f6d8294ba1d0dc6aac49",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_const_list_remove-c5deb20.stderr b/tests/reference/asr-test_const_list_remove-c5deb20.stderr
index cdc585f4fc1..533c518cd28 100644
--- a/tests/reference/asr-test_const_list_remove-c5deb20.stderr
+++ b/tests/reference/asr-test_const_list_remove-c5deb20.stderr
@@ -3,3 +3,7 @@ semantic error: cannot remove element from a const list
   |
 7 |     CONST_INTEGER_LIST.remove(1)
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_const_list_reverse-2df1a6f.json b/tests/reference/asr-test_const_list_reverse-2df1a6f.json
index b463e10677e..58f4e050a94 100644
--- a/tests/reference/asr-test_const_list_reverse-2df1a6f.json
+++ b/tests/reference/asr-test_const_list_reverse-2df1a6f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_const_list_reverse-2df1a6f.stderr",
-    "stderr_hash": "78d4df28bbde66600867165e7c4d2b7e56874ba0f459052f8ab1b7fc",
+    "stderr_hash": "c5f24fc2dd6095dffe16dc5ed7de9b5956b89639be4a70db29814cab",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_const_list_reverse-2df1a6f.stderr b/tests/reference/asr-test_const_list_reverse-2df1a6f.stderr
index f49888969e3..df7b8b2cf95 100644
--- a/tests/reference/asr-test_const_list_reverse-2df1a6f.stderr
+++ b/tests/reference/asr-test_const_list_reverse-2df1a6f.stderr
@@ -3,3 +3,7 @@ semantic error: cannot reverse a const list
   |
 7 |     CONST_INTEGER_LIST.reverse()
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict1-a45a075.json b/tests/reference/asr-test_dict1-a45a075.json
index eeb9ffe3f75..19ba8425024 100644
--- a/tests/reference/asr-test_dict1-a45a075.json
+++ b/tests/reference/asr-test_dict1-a45a075.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict1-a45a075.stderr",
-    "stderr_hash": "a9fbe4acc4f82141b1111e9aef3d3c50f27540d41ff3382fe46da8ea",
+    "stderr_hash": "0e3b1104b9ed857a9142b9caa4a11cdb879a9699f5543ebc29937fef",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict1-a45a075.stderr b/tests/reference/asr-test_dict1-a45a075.stderr
index 01fe7b133f1..b0d8cfb2fa9 100644
--- a/tests/reference/asr-test_dict1-a45a075.stderr
+++ b/tests/reference/asr-test_dict1-a45a075.stderr
@@ -3,3 +3,7 @@ semantic error: Key type should be 'i32' instead of 'str'
   |
 5 |     z = x["a"]
   |           ^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict10-8c0beff.json b/tests/reference/asr-test_dict10-8c0beff.json
index 2b2342369e8..15958f55f0e 100644
--- a/tests/reference/asr-test_dict10-8c0beff.json
+++ b/tests/reference/asr-test_dict10-8c0beff.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict10-8c0beff.stderr",
-    "stderr_hash": "06772bed43d8fff0fb889a763afb49307005f50ce26c7a601652e258",
+    "stderr_hash": "15f8c2e84c305015f7031792aaf61a3140a69d99075ee1f6390b99d6",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict10-8c0beff.stderr b/tests/reference/asr-test_dict10-8c0beff.stderr
index 58c4edd7d3c..b99ee2093df 100644
--- a/tests/reference/asr-test_dict10-8c0beff.stderr
+++ b/tests/reference/asr-test_dict10-8c0beff.stderr
@@ -3,3 +3,7 @@ semantic error: 'dict' key type cannot be float/complex because resolving collis
   |
 4 |     d: dict[c32, f64] = {}
   |        ^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict11-2ab4e6c.json b/tests/reference/asr-test_dict11-2ab4e6c.json
index c91886a137c..dff0b9019ab 100644
--- a/tests/reference/asr-test_dict11-2ab4e6c.json
+++ b/tests/reference/asr-test_dict11-2ab4e6c.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict11-2ab4e6c.stderr",
-    "stderr_hash": "6ef78d7738e0780fc0f9b9567390798b3d74374b95d0dd156ccbdab4",
+    "stderr_hash": "4feebf03a1adde189a82be34ee36d813036c5bb30a0a182b938029ad",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict11-2ab4e6c.stderr b/tests/reference/asr-test_dict11-2ab4e6c.stderr
index fcc460b76ff..1fc9b4e5e5c 100644
--- a/tests/reference/asr-test_dict11-2ab4e6c.stderr
+++ b/tests/reference/asr-test_dict11-2ab4e6c.stderr
@@ -3,3 +3,7 @@ semantic error: 'dict' key type cannot be float/complex because resolving collis
   |
 4 |     d: dict[c64, f32] = {}
   |        ^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict12-7c74d08.json b/tests/reference/asr-test_dict12-7c74d08.json
index 9922026e7b6..ebe1fc34724 100644
--- a/tests/reference/asr-test_dict12-7c74d08.json
+++ b/tests/reference/asr-test_dict12-7c74d08.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict12-7c74d08.stderr",
-    "stderr_hash": "9243262b97e5e6a555eafbbfd93440e86e66a3536cc0fb9902a7e0d2",
+    "stderr_hash": "751513996872b77f6e8f7a2c244debb99e0c482a8988dd0edbdda86f",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict12-7c74d08.stderr b/tests/reference/asr-test_dict12-7c74d08.stderr
index 5f9fb390f60..2407bf6062e 100644
--- a/tests/reference/asr-test_dict12-7c74d08.stderr
+++ b/tests/reference/asr-test_dict12-7c74d08.stderr
@@ -3,3 +3,7 @@ semantic error: 'dict' key type cannot be float/complex because resolving collis
   |
 2 |     print({0.0: 1.1}) # constant dict with floating point value as key
   |           ^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict13-683b290.json b/tests/reference/asr-test_dict13-683b290.json
index 982bd805409..92dc8ebf9de 100644
--- a/tests/reference/asr-test_dict13-683b290.json
+++ b/tests/reference/asr-test_dict13-683b290.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict13-683b290.stderr",
-    "stderr_hash": "60bc3be332a1b638ade1cf40068ee4381ba4a79942a76c104c9cdebd",
+    "stderr_hash": "38f9acbaebebd19e95f3d298ab13eb99f22efa86c6f1e9d495ad5f3a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict13-683b290.stderr b/tests/reference/asr-test_dict13-683b290.stderr
index 9dc7b6ef9c2..c27255be7c9 100644
--- a/tests/reference/asr-test_dict13-683b290.stderr
+++ b/tests/reference/asr-test_dict13-683b290.stderr
@@ -3,3 +3,7 @@ semantic error: 'dict' key type cannot be float/complex because resolving collis
   |
 2 |     print({complex(0.0, 1.0): 1.1}) # constant dict with complex value as key
   |           ^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict2-4587f02.json b/tests/reference/asr-test_dict2-4587f02.json
index 270d51c545c..5947865cda7 100644
--- a/tests/reference/asr-test_dict2-4587f02.json
+++ b/tests/reference/asr-test_dict2-4587f02.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict2-4587f02.stderr",
-    "stderr_hash": "9de5d75622644a0cb98bdd3f73249772c25c293f508343b31cc34607",
+    "stderr_hash": "291c5956c4006303abdbe6d41bcac8de6c0a967a04a4747ef6a5e456",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict2-4587f02.stderr b/tests/reference/asr-test_dict2-4587f02.stderr
index dde39a40a82..09d4b7e6737 100644
--- a/tests/reference/asr-test_dict2-4587f02.stderr
+++ b/tests/reference/asr-test_dict2-4587f02.stderr
@@ -3,3 +3,7 @@ semantic error: Key type should be 'str' instead of 'i32'
   |
 4 |     y[1] = -3
   |       ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict3-d28f38f.json b/tests/reference/asr-test_dict3-d28f38f.json
index ea944408eab..383f6a71ce2 100644
--- a/tests/reference/asr-test_dict3-d28f38f.json
+++ b/tests/reference/asr-test_dict3-d28f38f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict3-d28f38f.stderr",
-    "stderr_hash": "e2cc26634c1ee7aeca96c006b3bd01205200e1a6187e01fde041c3b4",
+    "stderr_hash": "5a41c9ce5829ee6b89bb03c21d2fd490a115845ae41c798b0e1e4940",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict3-d28f38f.stderr b/tests/reference/asr-test_dict3-d28f38f.stderr
index da5a97b2ceb..9bfe4962e15 100644
--- a/tests/reference/asr-test_dict3-d28f38f.stderr
+++ b/tests/reference/asr-test_dict3-d28f38f.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in get's key value, the types must be compatible
   |
 5 |     x = y.get(1)
   |               ^ type mismatch (found: 'i32', expected: 'str')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict4-39489fa.json b/tests/reference/asr-test_dict4-39489fa.json
index dbe64e91c06..5a3b44239bc 100644
--- a/tests/reference/asr-test_dict4-39489fa.json
+++ b/tests/reference/asr-test_dict4-39489fa.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict4-39489fa.stderr",
-    "stderr_hash": "fee0e93265feaf634ae62eded08ec63f6c37530369217731b552de61",
+    "stderr_hash": "cc2d7602ef35b6695e01113c11fa21dcd3836fe2d7c9734cc6c2ba89",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict4-39489fa.stderr b/tests/reference/asr-test_dict4-39489fa.stderr
index 1b9e3847a83..bcd421563e5 100644
--- a/tests/reference/asr-test_dict4-39489fa.stderr
+++ b/tests/reference/asr-test_dict4-39489fa.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 2 |     d: dict[i32, i32] = {1: "a", 2: "b"}
   |     ^                   ^^^^^^^^^^^^^^^^ type mismatch ('dict[i32, i32]' and 'dict[i32, str]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict5-c436d37.json b/tests/reference/asr-test_dict5-c436d37.json
index 4c7034730cc..79821e16e99 100644
--- a/tests/reference/asr-test_dict5-c436d37.json
+++ b/tests/reference/asr-test_dict5-c436d37.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict5-c436d37.stderr",
-    "stderr_hash": "85918b86a904812b9f151ec636dac3c770446a33ebac2f5910591ea7",
+    "stderr_hash": "3931655b3967ece317bb4f759df5e31fa8970bc34b740a2ad187cce5",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict5-c436d37.stderr b/tests/reference/asr-test_dict5-c436d37.stderr
index c38b8997bad..eb5f0ffa5d5 100644
--- a/tests/reference/asr-test_dict5-c436d37.stderr
+++ b/tests/reference/asr-test_dict5-c436d37.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in assignment, the types must be compatible
   |
 3 |     d = {1: "a", 2: "b"}
   |     ^   ^^^^^^^^^^^^^^^^ type mismatch ('dict[i32, i32]' and 'dict[i32, str]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict6-95e3b14.json b/tests/reference/asr-test_dict6-95e3b14.json
index 02c62b38c20..f067b0f0ae3 100644
--- a/tests/reference/asr-test_dict6-95e3b14.json
+++ b/tests/reference/asr-test_dict6-95e3b14.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict6-95e3b14.stderr",
-    "stderr_hash": "786fd07ddc3919823741b0db9a9ff0ba898b106d677657ea5f80fd2e",
+    "stderr_hash": "874dd0405e09cb7f345ec74a015fec0aa7d8185df22ae9d611633c26",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict6-95e3b14.stderr b/tests/reference/asr-test_dict6-95e3b14.stderr
index 9da26030e6d..1c3dcf03aab 100644
--- a/tests/reference/asr-test_dict6-95e3b14.stderr
+++ b/tests/reference/asr-test_dict6-95e3b14.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in pop's key value, the types must be compatible
   |
 5 |     res = d.pop("a")
   |                 ^^^ type mismatch (found: 'str', expected: 'i32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict7-1415e14.json b/tests/reference/asr-test_dict7-1415e14.json
index 64eb4e7eb3f..f359fab8ab1 100644
--- a/tests/reference/asr-test_dict7-1415e14.json
+++ b/tests/reference/asr-test_dict7-1415e14.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict7-1415e14.stderr",
-    "stderr_hash": "a51d1d4a46839e1f4258410e979ba83a14abe8c011482e30be2336cd",
+    "stderr_hash": "25ac6ccfcf5724a3c69a51e57c4f2661da77f8ea9d6d219f20452297",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict7-1415e14.stderr b/tests/reference/asr-test_dict7-1415e14.stderr
index 7884efa64e4..9ef2b1cf6ff 100644
--- a/tests/reference/asr-test_dict7-1415e14.stderr
+++ b/tests/reference/asr-test_dict7-1415e14.stderr
@@ -3,3 +3,7 @@ semantic error: unhashable type in dict: 'slice'
   |
 4 |     print(d[1:2])
   |           ^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict8-d960ce0.json b/tests/reference/asr-test_dict8-d960ce0.json
index 303c677d1d4..8116026ab34 100644
--- a/tests/reference/asr-test_dict8-d960ce0.json
+++ b/tests/reference/asr-test_dict8-d960ce0.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict8-d960ce0.stderr",
-    "stderr_hash": "c2dcf3e38154f9a69328274fafd4940b8b6296d31f442c01c88eaa0e",
+    "stderr_hash": "874fe99874eb5849c3ead7894c52cc1629c6cce8ea9a3d4d3e94169e",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict8-d960ce0.stderr b/tests/reference/asr-test_dict8-d960ce0.stderr
index 050138ffacb..728a042b9dd 100644
--- a/tests/reference/asr-test_dict8-d960ce0.stderr
+++ b/tests/reference/asr-test_dict8-d960ce0.stderr
@@ -3,3 +3,7 @@ semantic error: 'dict' key type cannot be float/complex because resolving collis
   |
 4 |     d: dict[f64, f64] = {}
   |        ^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_dict9-907bda7.json b/tests/reference/asr-test_dict9-907bda7.json
index 3603e2ca62f..ec81d39ebb5 100644
--- a/tests/reference/asr-test_dict9-907bda7.json
+++ b/tests/reference/asr-test_dict9-907bda7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_dict9-907bda7.stderr",
-    "stderr_hash": "3278571c4f1c492f88f33ca78dcf8fb5051f9e3ca89df7557b7881f6",
+    "stderr_hash": "990ee479c2b779810f75e956bfbd05f6237f54be37fe69ce4d958cdc",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_dict9-907bda7.stderr b/tests/reference/asr-test_dict9-907bda7.stderr
index a1394398fa7..d509ff13a85 100644
--- a/tests/reference/asr-test_dict9-907bda7.stderr
+++ b/tests/reference/asr-test_dict9-907bda7.stderr
@@ -3,3 +3,7 @@ semantic error: 'dict' key type cannot be float/complex because resolving collis
   |
 4 |     d: dict[f32, f64] = {}
   |        ^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_float_semantic_error-58c0c90.json b/tests/reference/asr-test_float_semantic_error-58c0c90.json
index e451309c05e..139e47a11d7 100644
--- a/tests/reference/asr-test_float_semantic_error-58c0c90.json
+++ b/tests/reference/asr-test_float_semantic_error-58c0c90.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_float_semantic_error-58c0c90.stderr",
-    "stderr_hash": "c11166fb86be513e74796a51f5c9e84653c2eb894ed95d502ed8af57",
+    "stderr_hash": "0f5559b6283133ffed614017f2d7606c5c6511467d127638cb555c0c",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_float_semantic_error-58c0c90.stderr b/tests/reference/asr-test_float_semantic_error-58c0c90.stderr
index 2698ced8c98..687878ef053 100644
--- a/tests/reference/asr-test_float_semantic_error-58c0c90.stderr
+++ b/tests/reference/asr-test_float_semantic_error-58c0c90.stderr
@@ -3,3 +3,7 @@ semantic error: float type is not supported yet.
   |
 4 |     pi: float = 3.14
   |         ^^^^^ Hint: Use f32 or f64 for now. 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_for2-e5d893f.json b/tests/reference/asr-test_for2-e5d893f.json
index 0067f33cd49..796ab45c73f 100644
--- a/tests/reference/asr-test_for2-e5d893f.json
+++ b/tests/reference/asr-test_for2-e5d893f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_for2-e5d893f.stderr",
-    "stderr_hash": "07152b2e843a1a3ea9ab8e5c7c620d4ecc9f29ef1408d48055028b95",
+    "stderr_hash": "eaaf63c17487bf1883a098fc4551c90cac26e8d0c00d8e4b27f830bd",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_for2-e5d893f.stderr b/tests/reference/asr-test_for2-e5d893f.stderr
index db88c88721a..1b2b33e12d0 100644
--- a/tests/reference/asr-test_for2-e5d893f.stderr
+++ b/tests/reference/asr-test_for2-e5d893f.stderr
@@ -7,3 +7,7 @@ semantic error: For loop increment type should be Integer.
   |
 4 |            print(i)
   | ...^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_func_args-a898a72.json b/tests/reference/asr-test_func_args-a898a72.json
index 52ff1af35d1..50187a76648 100644
--- a/tests/reference/asr-test_func_args-a898a72.json
+++ b/tests/reference/asr-test_func_args-a898a72.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_func_args-a898a72.stderr",
-    "stderr_hash": "b498b34cd18395e17ab982dc47abb832c01bd16ede103fad53068304",
+    "stderr_hash": "81c7b0c6d133c456c6d08779ade1f7c3a4f0eb32bb935caa2ff0286e",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_func_args-a898a72.stderr b/tests/reference/asr-test_func_args-a898a72.stderr
index ec5891080ad..37b2184ed65 100644
--- a/tests/reference/asr-test_func_args-a898a72.stderr
+++ b/tests/reference/asr-test_func_args-a898a72.stderr
@@ -3,3 +3,7 @@ semantic error: Number of arguments does not match in the function call
    |
 11 |     ans = fib(35, 10)
    |           ^^^^^^^^^^^ (found: '2', expected: '1')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_import_01-b859c43.json b/tests/reference/asr-test_import_01-b859c43.json
index 4c1f0a511b4..4fc1c594060 100644
--- a/tests/reference/asr-test_import_01-b859c43.json
+++ b/tests/reference/asr-test_import_01-b859c43.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_import_01-b859c43.stderr",
-    "stderr_hash": "ef59d49c8273cdd97e830cac94b3cc620fb24b07ce00c3394081c9c5",
+    "stderr_hash": "0f8409943b664b0fc9dcc12cbc61816e1ed556ccff2e9ccc833b16b4",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_import_01-b859c43.stderr b/tests/reference/asr-test_import_01-b859c43.stderr
index a2a50d4911b..497eeb67922 100644
--- a/tests/reference/asr-test_import_01-b859c43.stderr
+++ b/tests/reference/asr-test_import_01-b859c43.stderr
@@ -8,3 +8,7 @@ semantic error: Type mismatch in procedure call; the types must be compatible
   |
 3 | def test(x: i32) -> i32:
   |             ^^^ type mismatch (passed argument type is f64 but required type is i32)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_import_02-55b47fa.json b/tests/reference/asr-test_import_02-55b47fa.json
index 04b0cf247e2..59e7a3df2a5 100644
--- a/tests/reference/asr-test_import_02-55b47fa.json
+++ b/tests/reference/asr-test_import_02-55b47fa.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_import_02-55b47fa.stderr",
-    "stderr_hash": "b30859152322cc22b1593d3af229c7b28fbc8bc03eb6542fec3a3c91",
+    "stderr_hash": "3b854e9889cf37acf07c6670c9a5edfb1a261c94aa04c68dad9adf51",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_import_02-55b47fa.stderr b/tests/reference/asr-test_import_02-55b47fa.stderr
index 2c4a4fd389e..af305b49cf8 100644
--- a/tests/reference/asr-test_import_02-55b47fa.stderr
+++ b/tests/reference/asr-test_import_02-55b47fa.stderr
@@ -9,3 +9,7 @@ semantic error: Type mismatch in annotation-assignment, the types must be compat
   |
 3 | X: Const[i32] = 1.23
   | ^               ^^^^ type mismatch ('i32' and 'f64')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_int_semantic_error-44fe25e.json b/tests/reference/asr-test_int_semantic_error-44fe25e.json
index 3747fc7b8b7..da296ce8a6e 100644
--- a/tests/reference/asr-test_int_semantic_error-44fe25e.json
+++ b/tests/reference/asr-test_int_semantic_error-44fe25e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_int_semantic_error-44fe25e.stderr",
-    "stderr_hash": "a1cd1ec0fee194e3c1651668753a1666ca46c925fa91335c6230e026",
+    "stderr_hash": "f7c05f58aea2d0d4bed0b3442fc71fb6a2f6f9574ec9df6cdb609065",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_int_semantic_error-44fe25e.stderr b/tests/reference/asr-test_int_semantic_error-44fe25e.stderr
index f75e0f05a65..997f1ad653b 100644
--- a/tests/reference/asr-test_int_semantic_error-44fe25e.stderr
+++ b/tests/reference/asr-test_int_semantic_error-44fe25e.stderr
@@ -3,3 +3,7 @@ semantic error: int type is not supported yet.
   |
 4 |     x: int = 1
   |        ^^^ Hint: Use i8, i16, i32 or i64 for now. 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_len1-839a615.json b/tests/reference/asr-test_len1-839a615.json
index ee88e63b6e5..647ef7db9bd 100644
--- a/tests/reference/asr-test_len1-839a615.json
+++ b/tests/reference/asr-test_len1-839a615.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_len1-839a615.stderr",
-    "stderr_hash": "50478fbc4d3bc86e9bf6cf012d810f31885d5e654423a0384557f919",
+    "stderr_hash": "36d068d445571f426a27d96788b38c67bbdd9fa7f7f55bd9f0e2984d",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_len1-839a615.stderr b/tests/reference/asr-test_len1-839a615.stderr
index 2a491e7a483..3d1bc840ce4 100644
--- a/tests/reference/asr-test_len1-839a615.stderr
+++ b/tests/reference/asr-test_len1-839a615.stderr
@@ -3,3 +3,7 @@ semantic error: len() is only supported for `str`, `set`, `dict`, `list` and `tu
   |
 4 |     print(len(x))
   |           ^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list1-73fd538.json b/tests/reference/asr-test_list1-73fd538.json
index 33b0c94fc71..9a83f05128a 100644
--- a/tests/reference/asr-test_list1-73fd538.json
+++ b/tests/reference/asr-test_list1-73fd538.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_list1-73fd538.stderr",
-    "stderr_hash": "8c791203aa1be4c1cb8911aaaf447a5e706cc00d17dfeba0b17c283b",
+    "stderr_hash": "750bd9322d9ea11413d91b9edaeebfc20c24fd7057a8b0051e22eb2e",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list1-73fd538.stderr b/tests/reference/asr-test_list1-73fd538.stderr
index a9f4fd03cf7..69dbb33a66d 100644
--- a/tests/reference/asr-test_list1-73fd538.stderr
+++ b/tests/reference/asr-test_list1-73fd538.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in 'remove', the types must be compatible
   |
 6 |     a.remove('error')
   |              ^^^^^^^ type mismatch (found: 'str', expected: 'i32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list2-10ffdd7.json b/tests/reference/asr-test_list2-10ffdd7.json
index 0510d548d45..cc31728d2dd 100644
--- a/tests/reference/asr-test_list2-10ffdd7.json
+++ b/tests/reference/asr-test_list2-10ffdd7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_list2-10ffdd7.stderr",
-    "stderr_hash": "be192bc4655f28313c415c7180d676e0383f0acb7e4de75a6b3d1a37",
+    "stderr_hash": "9516440123f4d2d64fe5de904159be272b692a1fe72c984f360f27a4",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list2-10ffdd7.stderr b/tests/reference/asr-test_list2-10ffdd7.stderr
index 0607fb82664..dc634baee2a 100644
--- a/tests/reference/asr-test_list2-10ffdd7.stderr
+++ b/tests/reference/asr-test_list2-10ffdd7.stderr
@@ -3,3 +3,7 @@ semantic error: append() takes exactly one argument
   |
 6 |     a.append(4, 5)
   |     ^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list3-5f4d2a8.json b/tests/reference/asr-test_list3-5f4d2a8.json
index 09d515e69a6..6f69f1d430c 100644
--- a/tests/reference/asr-test_list3-5f4d2a8.json
+++ b/tests/reference/asr-test_list3-5f4d2a8.json
@@ -5,9 +5,9 @@
     "infile_hash": "f512b77e66fe356108135243473cf9441bc532310547070a9aeef3e9",
     "outfile": null,
     "outfile_hash": null,
-    "stdout": null,
-    "stdout_hash": null,
+    "stdout": "asr-test_list3-5f4d2a8.stdout",
+    "stdout_hash": "513c87cf17bc1cd3a1255ca0fec74484c144ba2083173f0c2c0ededa",
     "stderr": "asr-test_list3-5f4d2a8.stderr",
-    "stderr_hash": "3e8e102841bfe5ae8524aa793b39cdf33de7e7073744a01f0049b424",
-    "returncode": 2
+    "stderr_hash": "61882ce7e951b985e294ac3529e8574d48212180a319380b2f103312",
+    "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list3-5f4d2a8.stderr b/tests/reference/asr-test_list3-5f4d2a8.stderr
index 45d1ab0536e..be62c2ed55c 100644
--- a/tests/reference/asr-test_list3-5f4d2a8.stderr
+++ b/tests/reference/asr-test_list3-5f4d2a8.stderr
@@ -3,3 +3,7 @@ semantic error: Argument to list.pop must be an integer
   |
 5 |     x = a.pop(2.2)
   |         ^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list3-5f4d2a8.stdout b/tests/reference/asr-test_list3-5f4d2a8.stdout
new file mode 100644
index 00000000000..4452226a973
--- /dev/null
+++ b/tests/reference/asr-test_list3-5f4d2a8.stdout
@@ -0,0 +1,104 @@
+(TranslationUnit
+    (SymbolTable
+        1
+        {
+            __main__:
+                (Module
+                    (SymbolTable
+                        2
+                        {
+                            test_e1:
+                                (Function
+                                    (SymbolTable
+                                        3
+                                        {
+                                            a:
+                                                (Variable
+                                                    3
+                                                    a
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (List
+                                                        (Integer 4)
+                                                    )
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                ),
+                                            x:
+                                                (Variable
+                                                    3
+                                                    x
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (Integer 4)
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                )
+                                        })
+                                    test_e1
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    []
+                                    []
+                                    [(Assignment
+                                        (Var 3 a)
+                                        (ListConstant
+                                            [(IntegerConstant 1 (Integer 4))
+                                            (IntegerConstant 2 (Integer 4))
+                                            (IntegerConstant 3 (Integer 4))]
+                                            (List
+                                                (Integer 4)
+                                            )
+                                        )
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                )
+                        })
+                    __main__
+                    []
+                    .false.
+                    .false.
+                ),
+            main_program:
+                (Program
+                    (SymbolTable
+                        4
+                        {
+                            
+                        })
+                    main_program
+                    []
+                    []
+                )
+        })
+    []
+)
diff --git a/tests/reference/asr-test_list4-d18a7e3.json b/tests/reference/asr-test_list4-d18a7e3.json
index af9e9f1da76..62028826e76 100644
--- a/tests/reference/asr-test_list4-d18a7e3.json
+++ b/tests/reference/asr-test_list4-d18a7e3.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_list4-d18a7e3.stderr",
-    "stderr_hash": "98922e9f57ab8e9d7af05424e9fdb93a9a1722114f5abb816439b161",
+    "stderr_hash": "58fc47e24ec3d6aa96ec247629c2ef6e0d996e481902aa9af62c87cb",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list4-d18a7e3.stderr b/tests/reference/asr-test_list4-d18a7e3.stderr
index b3b46838688..23e3741f196 100644
--- a/tests/reference/asr-test_list4-d18a7e3.stderr
+++ b/tests/reference/asr-test_list4-d18a7e3.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in index, expected a single integer or slice
   |
 7 |     x = a[0.2]
   |           ^^^ type mismatch (found: 'f64', expected: 'i32' or slice)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list_concat-41d186f.json b/tests/reference/asr-test_list_concat-41d186f.json
index ff64ae4aac8..34b3e75f8ac 100644
--- a/tests/reference/asr-test_list_concat-41d186f.json
+++ b/tests/reference/asr-test_list_concat-41d186f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_list_concat-41d186f.stderr",
-    "stderr_hash": "b0a3cfa79525db1ed6aa4ed1f47b11e4852da5a59e043d32a7814ede",
+    "stderr_hash": "9bb9a39f1d0dc4e9e90199ac9fdb190fb4fbf4e42cb4bec96d6174c8",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list_concat-41d186f.stderr b/tests/reference/asr-test_list_concat-41d186f.stderr
index bdfcab29aff..052f4c0fbbe 100644
--- a/tests/reference/asr-test_list_concat-41d186f.stderr
+++ b/tests/reference/asr-test_list_concat-41d186f.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in shorthand operator, the types must be compatibl
   |
 8 |   a += b
   |   ^    ^ type mismatch ('list[i32]' and 'list[f64]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list_count-4b42498.json b/tests/reference/asr-test_list_count-4b42498.json
index f4864b55fbe..a89270c1e11 100644
--- a/tests/reference/asr-test_list_count-4b42498.json
+++ b/tests/reference/asr-test_list_count-4b42498.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_list_count-4b42498.stderr",
-    "stderr_hash": "f26efcc623b68ca43ef871eb01c8e3cbd1ae464baaa491c6e4969696",
+    "stderr_hash": "3243061047f267a18ab172f35c154ffc38e67db5d1adf8f861100dbc",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list_count-4b42498.stderr b/tests/reference/asr-test_list_count-4b42498.stderr
index ad60a50f0ed..cf53d8e8c00 100644
--- a/tests/reference/asr-test_list_count-4b42498.stderr
+++ b/tests/reference/asr-test_list_count-4b42498.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in 'count', the types must be compatible
   |
 6 |     a.count(1.0)
   |             ^^^ type mismatch (found: 'f64', expected: 'i32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_list_slicing-984fbf0.json b/tests/reference/asr-test_list_slicing-984fbf0.json
index d525b6d6c97..615d281c3f4 100644
--- a/tests/reference/asr-test_list_slicing-984fbf0.json
+++ b/tests/reference/asr-test_list_slicing-984fbf0.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_list_slicing-984fbf0.stderr",
-    "stderr_hash": "6763533f9c1730429d50f58b653595bfeef48c4d19943c36d037d023",
+    "stderr_hash": "56700e105a59d772c5c08c15ffd02cb9d15275ad2be505cb708ae7f7",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_list_slicing-984fbf0.stderr b/tests/reference/asr-test_list_slicing-984fbf0.stderr
index dc773c9f70c..bf9e980a051 100644
--- a/tests/reference/asr-test_list_slicing-984fbf0.stderr
+++ b/tests/reference/asr-test_list_slicing-984fbf0.stderr
@@ -3,3 +3,7 @@ semantic error: slice step cannot be zero
   |
 6 |     print(l[0:10:0])
   |                  ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_logical_compare_01-5db0e2e.json b/tests/reference/asr-test_logical_compare_01-5db0e2e.json
index 7030df8c0e0..3fbd6af1268 100644
--- a/tests/reference/asr-test_logical_compare_01-5db0e2e.json
+++ b/tests/reference/asr-test_logical_compare_01-5db0e2e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_logical_compare_01-5db0e2e.stderr",
-    "stderr_hash": "d10cac68687315b5d29828e0acb5170f44bd91dd30784f8bd4943bb0",
+    "stderr_hash": "0416107a994b387574dbac2fd87fc8e329917db9e1b1cee13af0df5a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_logical_compare_01-5db0e2e.stderr b/tests/reference/asr-test_logical_compare_01-5db0e2e.stderr
index c1e876782cc..acd041727b8 100644
--- a/tests/reference/asr-test_logical_compare_01-5db0e2e.stderr
+++ b/tests/reference/asr-test_logical_compare_01-5db0e2e.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch: 'str' and 'i32'. Both operands must be of the sam
   |
 2 |     print("hello" or 10)
   |           ^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_max_min-3c2fc51.json b/tests/reference/asr-test_max_min-3c2fc51.json
index 22173da66d9..ddb2b232f7e 100644
--- a/tests/reference/asr-test_max_min-3c2fc51.json
+++ b/tests/reference/asr-test_max_min-3c2fc51.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_max_min-3c2fc51.stdout",
-    "stdout_hash": "0e90edcd031f0437467ad7e94484aa97a9b9fad2c07c511a574d6593",
+    "stdout_hash": "a6759cdd5e7de0f5151996c1e75ff24b9e5007425e580c942f4de11b",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_max_min-3c2fc51.stdout b/tests/reference/asr-test_max_min-3c2fc51.stdout
index b33084f9740..bbab756eebd 100644
--- a/tests/reference/asr-test_max_min-3c2fc51.stdout
+++ b/tests/reference/asr-test_max_min-3c2fc51.stdout
@@ -10,7 +10,7 @@
                             __main__global_stmts:
                                 (Function
                                     (SymbolTable
-                                        140
+                                        8
                                         {
                                             
                                         })
@@ -152,36 +152,6 @@
                                                     Public
                                                     Required
                                                     .false.
-                                                ),
-                                            max:
-                                                (ExternalSymbol
-                                                    4
-                                                    max
-                                                    8 max
-                                                    lpython_builtin
-                                                    []
-                                                    max
-                                                    Private
-                                                ),
-                                            max@__lpython_overloaded_2__max:
-                                                (ExternalSymbol
-                                                    4
-                                                    max@__lpython_overloaded_2__max
-                                                    8 __lpython_overloaded_2__max
-                                                    lpython_builtin
-                                                    []
-                                                    __lpython_overloaded_2__max
-                                                    Public
-                                                ),
-                                            max@__lpython_overloaded_3__max:
-                                                (ExternalSymbol
-                                                    4
-                                                    max@__lpython_overloaded_3__max
-                                                    8 __lpython_overloaded_3__max
-                                                    lpython_builtin
-                                                    []
-                                                    __lpython_overloaded_3__max
-                                                    Public
                                                 )
                                         })
                                     test_max_float
@@ -201,7 +171,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 d)
                                         (RealConstant
                                             23.233000
@@ -209,7 +179,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 e)
                                         (RealConstant
                                             23.223300
@@ -217,7 +187,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 f)
                                         (RealConstant
                                             21.230000
@@ -227,15 +197,14 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (FunctionCall
-                                                4 max@__lpython_overloaded_2__max
-                                                4 max
-                                                [((Var 4 d))
-                                                ((Var 4 e))
-                                                ((Var 4 f))]
+                                            (IntrinsicElementalFunction
+                                                Max
+                                                [(Var 4 d)
+                                                (Var 4 e)
+                                                (Var 4 f)]
+                                                0
                                                 (Real 8)
                                                 ()
-                                                ()
                                             )
                                             Eq
                                             (Var 4 d)
@@ -246,14 +215,13 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (FunctionCall
-                                                4 max@__lpython_overloaded_3__max
-                                                4 max
-                                                [((Var 4 e))
-                                                ((Var 4 f))]
+                                            (IntrinsicElementalFunction
+                                                Max
+                                                [(Var 4 e)
+                                                (Var 4 f)]
+                                                0
                                                 (Real 8)
                                                 ()
-                                                ()
                                             )
                                             Eq
                                             (Var 4 e)
@@ -320,36 +288,6 @@
                                                     Public
                                                     Required
                                                     .false.
-                                                ),
-                                            max:
-                                                (ExternalSymbol
-                                                    3
-                                                    max
-                                                    8 max
-                                                    lpython_builtin
-                                                    []
-                                                    max
-                                                    Private
-                                                ),
-                                            max@__lpython_overloaded_0__max:
-                                                (ExternalSymbol
-                                                    3
-                                                    max@__lpython_overloaded_0__max
-                                                    8 __lpython_overloaded_0__max
-                                                    lpython_builtin
-                                                    []
-                                                    __lpython_overloaded_0__max
-                                                    Public
-                                                ),
-                                            max@__lpython_overloaded_1__max:
-                                                (ExternalSymbol
-                                                    3
-                                                    max@__lpython_overloaded_1__max
-                                                    8 __lpython_overloaded_1__max
-                                                    lpython_builtin
-                                                    []
-                                                    __lpython_overloaded_1__max
-                                                    Public
                                                 )
                                         })
                                     test_max_int
@@ -369,31 +307,30 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (IntegerConstant 3 (Integer 4))
                                         ()
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (FunctionCall
-                                                3 max@__lpython_overloaded_0__max
-                                                3 max
-                                                [((Var 3 a))
-                                                ((Var 3 b))]
+                                            (IntrinsicElementalFunction
+                                                Max
+                                                [(Var 3 a)
+                                                (Var 3 b)]
+                                                0
                                                 (Integer 4)
                                                 ()
-                                                ()
                                             )
                                             Eq
                                             (Var 3 b)
@@ -404,15 +341,14 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (FunctionCall
-                                                3 max@__lpython_overloaded_1__max
-                                                3 max
-                                                [((Var 3 a))
-                                                ((Var 3 b))
-                                                ((Var 3 c))]
+                                            (IntrinsicElementalFunction
+                                                Max
+                                                [(Var 3 a)
+                                                (Var 3 b)
+                                                (Var 3 c)]
+                                                0
                                                 (Integer 4)
                                                 ()
-                                                ()
                                             )
                                             Eq
                                             (Var 3 c)
@@ -423,15 +359,14 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (FunctionCall
-                                                3 max@__lpython_overloaded_1__max
-                                                3 max
-                                                [((IntegerConstant 1 (Integer 4)))
-                                                ((IntegerConstant 2 (Integer 4)))
-                                                ((IntegerConstant 3 (Integer 4)))]
+                                            (IntrinsicElementalFunction
+                                                Max
+                                                [(IntegerConstant 1 (Integer 4))
+                                                (IntegerConstant 2 (Integer 4))
+                                                (IntegerConstant 3 (Integer 4))]
+                                                0
                                                 (Integer 4)
                                                 (IntegerConstant 3 (Integer 4))
-                                                ()
                                             )
                                             Eq
                                             (IntegerConstant 3 (Integer 4))
@@ -445,14 +380,13 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (FunctionCall
-                                                3 max@__lpython_overloaded_0__max
-                                                3 max
-                                                [((IntegerConstant 1 (Integer 4)))
-                                                ((IntegerConstant 6 (Integer 4)))]
+                                            (IntrinsicElementalFunction
+                                                Max
+                                                [(IntegerConstant 1 (Integer 4))
+                                                (IntegerConstant 6 (Integer 4))]
+                                                0
                                                 (Integer 4)
                                                 (IntegerConstant 6 (Integer 4))
-                                                ()
                                             )
                                             Eq
                                             (IntegerConstant 6 (Integer 4))
@@ -541,7 +475,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 d)
                                         (RealConstant
                                             23.233000
@@ -549,7 +483,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 e)
                                         (RealConstant
                                             23.223300
@@ -557,7 +491,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 f)
                                         (RealConstant
                                             21.230000
@@ -567,7 +501,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Min
                                                 [(Var 6 d)
                                                 (Var 6 e)
@@ -585,7 +519,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Min
                                                 [(Var 6 e)
                                                 (Var 6 f)]
@@ -677,24 +611,24 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 a)
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (IntegerConstant 2 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c)
                                         (IntegerConstant 3 (Integer 4))
                                         ()
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Min
                                                 [(Var 5 a)
                                                 (Var 5 b)]
@@ -711,7 +645,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Min
                                                 [(Var 5 a)
                                                 (Var 5 b)
@@ -729,7 +663,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Min
                                                 [(IntegerConstant 1 (Integer 4))
                                                 (IntegerConstant 2 (Integer 4))
@@ -750,7 +684,7 @@
                                     )
                                     (Assert
                                         (IntegerCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Min
                                                 [(IntegerConstant 1 (Integer 4))
                                                 (IntegerConstant 6 (Integer 4))]
@@ -776,20 +710,18 @@
                                 )
                         })
                     __main__
-                    [lpython_builtin]
+                    []
                     .false.
                     .false.
                 ),
-            lpython_builtin:
-                (IntrinsicModule lpython_builtin),
             main_program:
                 (Program
                     (SymbolTable
-                        141
+                        9
                         {
                             __main__global_stmts:
                                 (ExternalSymbol
-                                    141
+                                    9
                                     __main__global_stmts
                                     2 __main__global_stmts
                                     __main__
@@ -801,7 +733,7 @@
                     main_program
                     [__main__]
                     [(SubroutineCall
-                        141 __main__global_stmts
+                        9 __main__global_stmts
                         2 __main__global_stmts
                         []
                         ()
diff --git a/tests/reference/asr-test_numpy_03-e600a49.json b/tests/reference/asr-test_numpy_03-e600a49.json
index 1a2834dbcb2..0db96efd5df 100644
--- a/tests/reference/asr-test_numpy_03-e600a49.json
+++ b/tests/reference/asr-test_numpy_03-e600a49.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_numpy_03-e600a49.stdout",
-    "stdout_hash": "2eb1440f0b8ed4f4faf19d9d995c7a7a0c903f895d549598bf4d7bb7",
+    "stdout_hash": "69fea28dc782f491d19d9df5a28c41a919e3ab5bfec6fa80b24a3b20",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_numpy_03-e600a49.stdout b/tests/reference/asr-test_numpy_03-e600a49.stdout
index 567a9cb860f..bf5f0a335e9 100644
--- a/tests/reference/asr-test_numpy_03-e600a49.stdout
+++ b/tests/reference/asr-test_numpy_03-e600a49.stdout
@@ -283,7 +283,7 @@
                                     )
                                     []
                                     [(Var 221 d)]
-                                    [(=
+                                    [(Assignment
                                         (Var 221 eps)
                                         (RealConstant
                                             0.000000
@@ -291,9 +291,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 b)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -301,6 +301,7 @@
                                                 (IntegerConstant 256 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -317,9 +318,9 @@
                                             (IntegerConstant 255 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 221 i)
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(Var 221 k)
                                                 (IntegerConstant 16 (Integer 4))]
@@ -329,7 +330,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 221 j)
                                             (IntegerBinOp
                                                 (Var 221 k)
@@ -346,7 +347,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (ArrayItem
                                                 (Var 221 b)
                                                 [(()
@@ -381,9 +382,9 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 a)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -393,13 +394,14 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 newshape)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -407,11 +409,12 @@
                                                 (IntegerConstant 2 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 221 newshape)
                                             [(()
@@ -424,7 +427,7 @@
                                         (IntegerConstant 16 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 221 newshape)
                                             [(()
@@ -437,7 +440,7 @@
                                         (IntegerConstant 16 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 a)
                                         (ArrayReshape
                                             (Var 221 b)
@@ -489,7 +492,7 @@
                                             (IntegerConstant 1 (Integer 4)))
                                             [(Assert
                                                 (RealCompare
-                                                    (IntrinsicScalarFunction
+                                                    (IntrinsicElementalFunction
                                                         Abs
                                                         [(RealBinOp
                                                             (RealBinOp
@@ -544,9 +547,9 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 c)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -558,13 +561,14 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 newshape1)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -572,11 +576,12 @@
                                                 (IntegerConstant 3 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 221 newshape1)
                                             [(()
@@ -589,7 +594,7 @@
                                         (IntegerConstant 16 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 221 newshape1)
                                             [(()
@@ -602,7 +607,7 @@
                                         (IntegerConstant 16 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 221 newshape1)
                                             [(()
@@ -615,7 +620,7 @@
                                         (IntegerConstant 16 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 c)
                                         (ArrayReshape
                                             (Var 221 d)
@@ -679,7 +684,7 @@
                                                 (IntegerConstant 1 (Integer 4)))
                                                 [(Assert
                                                     (RealCompare
-                                                        (IntrinsicScalarFunction
+                                                        (IntrinsicElementalFunction
                                                             Abs
                                                             [(RealBinOp
                                                                 (RealBinOp
@@ -993,7 +998,7 @@
                                     )
                                     []
                                     [(Var 220 a)]
-                                    [(=
+                                    [(Assignment
                                         (Var 220 eps)
                                         (RealConstant
                                             0.000000
@@ -1001,9 +1006,9 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 b)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1011,13 +1016,14 @@
                                                 (IntegerConstant 256 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 newshape)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -1025,11 +1031,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 220 newshape)
                                             [(()
@@ -1042,7 +1049,7 @@
                                         (IntegerConstant 256 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 b)
                                         (ArrayReshape
                                             (Var 220 a)
@@ -1080,9 +1087,9 @@
                                             (IntegerConstant 255 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 220 i)
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(Var 220 k)
                                                 (IntegerConstant 16 (Integer 4))]
@@ -1092,7 +1099,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 220 j)
                                             (IntegerBinOp
                                                 (Var 220 k)
@@ -1111,7 +1118,7 @@
                                         )
                                         (Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (RealBinOp
@@ -1161,9 +1168,9 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 c)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1175,13 +1182,14 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 c)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1193,6 +1201,7 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1233,7 +1242,7 @@
                                                     (IntegerConstant 15 (Integer 4))
                                                 )
                                                 (IntegerConstant 1 (Integer 4)))
-                                                [(=
+                                                [(Assignment
                                                     (ArrayItem
                                                         (Var 220 c)
                                                         [(()
@@ -1284,9 +1293,9 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1294,13 +1303,14 @@
                                                 (IntegerConstant 4096 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 newshape1)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Integer 4)
@@ -1308,11 +1318,12 @@
                                                 (IntegerConstant 1 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (ArrayItem
                                             (Var 220 newshape1)
                                             [(()
@@ -1325,7 +1336,7 @@
                                         (IntegerConstant 4096 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 d)
                                         (ArrayReshape
                                             (Var 220 c)
@@ -1363,7 +1374,7 @@
                                             (IntegerConstant 4095 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 220 i)
                                             (Cast
                                                 (RealBinOp
@@ -1392,9 +1403,9 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 220 j)
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(IntegerBinOp
                                                     (Var 220 l)
@@ -1416,7 +1427,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 220 k)
                                             (IntegerBinOp
                                                 (IntegerBinOp
@@ -1447,7 +1458,7 @@
                                         )
                                         (Assert
                                             (RealCompare
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(RealBinOp
                                                         (RealBinOp
@@ -1641,9 +1652,9 @@
                                     [test_nd_to_1d
                                     test_1d_to_nd]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 222 a)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1653,6 +1664,7 @@
                                                 (IntegerConstant 16 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1681,7 +1693,7 @@
                                                 (IntegerConstant 15 (Integer 4))
                                             )
                                             (IntegerConstant 1 (Integer 4)))
-                                            [(=
+                                            [(Assignment
                                                 (ArrayItem
                                                     (Var 222 a)
                                                     [(()
@@ -1740,9 +1752,9 @@
                                         ))]
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 222 d)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -1750,6 +1762,7 @@
                                                 (IntegerConstant 4096 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -1766,7 +1779,7 @@
                                             (IntegerConstant 4095 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (Var 222 i)
                                             (Cast
                                                 (RealBinOp
@@ -1795,9 +1808,9 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 222 j)
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 FloorDiv
                                                 [(IntegerBinOp
                                                     (Var 222 l)
@@ -1819,7 +1832,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (Var 222 k)
                                             (IntegerBinOp
                                                 (IntegerBinOp
@@ -1848,7 +1861,7 @@
                                             )
                                             ()
                                         )
-                                        (=
+                                        (Assignment
                                             (ArrayItem
                                                 (Var 222 d)
                                                 [(()
diff --git a/tests/reference/asr-test_numpy_04-ecbb614.json b/tests/reference/asr-test_numpy_04-ecbb614.json
index 5b681bab99a..af3af53fb2b 100644
--- a/tests/reference/asr-test_numpy_04-ecbb614.json
+++ b/tests/reference/asr-test_numpy_04-ecbb614.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_numpy_04-ecbb614.stdout",
-    "stdout_hash": "9ef682c04c3f77549cef1fd1073983fdfef987c2491900a3bfa6dd02",
+    "stdout_hash": "19c7ccaca422743ad98392c5641b61a0874cc42140d1ad9fd0abaacf",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_numpy_04-ecbb614.stdout b/tests/reference/asr-test_numpy_04-ecbb614.stdout
index 7c26dc63af5..f47f146f624 100644
--- a/tests/reference/asr-test_numpy_04-ecbb614.stdout
+++ b/tests/reference/asr-test_numpy_04-ecbb614.stdout
@@ -146,7 +146,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 220 x)
                                         (ArrayConstant
                                             [(RealConstant
@@ -171,7 +171,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 eps)
                                         (RealConstant
                                             0.000000
@@ -181,7 +181,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ArrayItem
@@ -214,7 +214,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ArrayItem
@@ -247,7 +247,7 @@
                                     )
                                     (Assert
                                         (RealCompare
-                                            (IntrinsicScalarFunction
+                                            (IntrinsicElementalFunction
                                                 Abs
                                                 [(RealBinOp
                                                     (ArrayItem
@@ -344,7 +344,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 221 x)
                                         (ArrayConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -360,7 +360,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 221 eps)
                                         (RealConstant
                                             0.000000
@@ -371,7 +371,7 @@
                                     (Assert
                                         (RealCompare
                                             (Cast
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(IntegerBinOp
                                                         (ArrayItem
@@ -406,7 +406,7 @@
                                     (Assert
                                         (RealCompare
                                             (Cast
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(IntegerBinOp
                                                         (ArrayItem
@@ -441,7 +441,7 @@
                                     (Assert
                                         (RealCompare
                                             (Cast
-                                                (IntrinsicScalarFunction
+                                                (IntrinsicElementalFunction
                                                     Abs
                                                     [(IntegerBinOp
                                                         (ArrayItem
diff --git a/tests/reference/asr-test_operator_01-0f232bf.json b/tests/reference/asr-test_operator_01-0f232bf.json
index 9cb9b85ba82..c154bb190cb 100644
--- a/tests/reference/asr-test_operator_01-0f232bf.json
+++ b/tests/reference/asr-test_operator_01-0f232bf.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_operator_01-0f232bf.stderr",
-    "stderr_hash": "6f529c2fc1fc5a489879c5d684c3415269794e563be85d62098aed7c",
+    "stderr_hash": "6e1377772200a65ab05a2abdab74d350f87c4a1f1f3c69cc321106fe",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_operator_01-0f232bf.stderr b/tests/reference/asr-test_operator_01-0f232bf.stderr
index 1a939f05a86..d95933177dd 100644
--- a/tests/reference/asr-test_operator_01-0f232bf.stderr
+++ b/tests/reference/asr-test_operator_01-0f232bf.stderr
@@ -3,3 +3,7 @@ semantic error: Unary operator '-' not supported for type struct A
   |
 9 |     print(-a)
   |           ^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_optional-97e5371.json b/tests/reference/asr-test_optional-97e5371.json
index 7dbe53ca63d..7b11169efae 100644
--- a/tests/reference/asr-test_optional-97e5371.json
+++ b/tests/reference/asr-test_optional-97e5371.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_optional-97e5371.stderr",
-    "stderr_hash": "b9cc75eb200847db5d4d39d9f511959ebf22faad68cf0096c7a2b68c",
+    "stderr_hash": "651a42d14e426b122a1048a63882de59e3508c8c68cdb1c25449e47a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_optional-97e5371.stderr b/tests/reference/asr-test_optional-97e5371.stderr
index 4c93a66d6b5..1dfcd81cb4f 100644
--- a/tests/reference/asr-test_optional-97e5371.stderr
+++ b/tests/reference/asr-test_optional-97e5371.stderr
@@ -3,3 +3,7 @@ semantic error: The type 'Optional' is undeclared.
   |
 1 | def match(pat : str, string : str) -> Optional[list[str] | str]:
   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_ord-316ce61.json b/tests/reference/asr-test_ord-316ce61.json
index 362e582d03a..b7b87531755 100644
--- a/tests/reference/asr-test_ord-316ce61.json
+++ b/tests/reference/asr-test_ord-316ce61.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_ord-316ce61.stderr",
-    "stderr_hash": "dda39c93777d64449510b35e893d516cd53ac299cd2b5f19b08464bd",
+    "stderr_hash": "46657c4e3818a75f46a02f519ec235038d7b7b026dc486817d2457c8",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_ord-316ce61.stderr b/tests/reference/asr-test_ord-316ce61.stderr
index 45103fea108..7c55fcceaac 100644
--- a/tests/reference/asr-test_ord-316ce61.stderr
+++ b/tests/reference/asr-test_ord-316ce61.stderr
@@ -3,3 +3,7 @@ semantic error: ord() is only supported for `str` of length 1
   |
 3 |     i = ord('ab')
   |             ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_pointer_types-1bf0d01.json b/tests/reference/asr-test_pointer_types-1bf0d01.json
index a8320672759..7e1031bd8b5 100644
--- a/tests/reference/asr-test_pointer_types-1bf0d01.json
+++ b/tests/reference/asr-test_pointer_types-1bf0d01.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_pointer_types-1bf0d01.stderr",
-    "stderr_hash": "3fcd692a6b79b6b3f22fc7a2957df19219fc817446aa6d46f47d049f",
+    "stderr_hash": "b4df27ea3ce9cb7b84a7dc30a2411e1b0521995bc564c60bdd1944f3",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_pointer_types-1bf0d01.stderr b/tests/reference/asr-test_pointer_types-1bf0d01.stderr
index 4a61aeb2e6b..9cc01c29ad5 100644
--- a/tests/reference/asr-test_pointer_types-1bf0d01.stderr
+++ b/tests/reference/asr-test_pointer_types-1bf0d01.stderr
@@ -3,3 +3,7 @@ semantic error: Casting not supported for different pointer types. Received targ
   |
 8 |     yptr1 = pointer(y)
   |     ^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_pow-3f5d550.json b/tests/reference/asr-test_pow-3f5d550.json
index 894399f6545..71a5367d842 100644
--- a/tests/reference/asr-test_pow-3f5d550.json
+++ b/tests/reference/asr-test_pow-3f5d550.json
@@ -8,6 +8,6 @@
     "stdout": "asr-test_pow-3f5d550.stdout",
     "stdout_hash": "407d7a20ed3b5b82ff211a9578e4978b68beca005c6791f49a0a6c1d",
     "stderr": "asr-test_pow-3f5d550.stderr",
-    "stderr_hash": "3d950301563cce75654f28bf41f6f53428ed1f5ae997774345f374a3",
+    "stderr_hash": "c8d2ad5bada75565722f6b33ab7bcc685bbf13892eb141b8086b56cf",
     "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_pow-3f5d550.stderr b/tests/reference/asr-test_pow-3f5d550.stderr
index 712d80384b8..71556ee754b 100644
--- a/tests/reference/asr-test_pow-3f5d550.stderr
+++ b/tests/reference/asr-test_pow-3f5d550.stderr
@@ -3,3 +3,7 @@ style suggestion: Could have used '**' instead of 'pow'
   |
 2 |     print(pow(2, 2))
   |           ^^^^^^^^^ '**' could be used instead
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_pow1-581ef42.json b/tests/reference/asr-test_pow1-581ef42.json
index a5584b1bc70..a39546dc88c 100644
--- a/tests/reference/asr-test_pow1-581ef42.json
+++ b/tests/reference/asr-test_pow1-581ef42.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_pow1-581ef42.stderr",
-    "stderr_hash": "7f7cc07cf6f08f2d953d6e6c1f4892e6379faaf8aa668117234293d0",
+    "stderr_hash": "21da5f9184a23c2acd4c61ce960a2223f03ef94a7c64bd8541e13d88",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_pow1-581ef42.stderr b/tests/reference/asr-test_pow1-581ef42.stderr
index fa7160f5849..26d3347bfb6 100644
--- a/tests/reference/asr-test_pow1-581ef42.stderr
+++ b/tests/reference/asr-test_pow1-581ef42.stderr
@@ -9,3 +9,7 @@ semantic error: Arguments do not match for any generic procedure, pow
   |
 4 |     print(pow(x,3))
   |           ^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_pow2-0dcbd7d.json b/tests/reference/asr-test_pow2-0dcbd7d.json
index 083bc76b8d0..4c75f9c0ad6 100644
--- a/tests/reference/asr-test_pow2-0dcbd7d.json
+++ b/tests/reference/asr-test_pow2-0dcbd7d.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_pow2-0dcbd7d.stderr",
-    "stderr_hash": "1d1d3a4a308e068439ac40685fcad6f29750560722b910be3341ce3c",
+    "stderr_hash": "bfb63764cf1f2e0ba85a55ac662e175793c1277192dda8663bca016e",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_pow2-0dcbd7d.stderr b/tests/reference/asr-test_pow2-0dcbd7d.stderr
index 896faa98e57..81cc979f801 100644
--- a/tests/reference/asr-test_pow2-0dcbd7d.stderr
+++ b/tests/reference/asr-test_pow2-0dcbd7d.stderr
@@ -9,3 +9,7 @@ semantic error: Arguments do not match for any generic procedure, pow
    |
 12 |     print(pow(a, b, c, d))
    |           ^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_pow3-79749ed.json b/tests/reference/asr-test_pow3-79749ed.json
index cd0f9f0d335..fbf05560d0c 100644
--- a/tests/reference/asr-test_pow3-79749ed.json
+++ b/tests/reference/asr-test_pow3-79749ed.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_pow3-79749ed.stderr",
-    "stderr_hash": "4a6600740ad466d250f39b76130ab5ab796312b1ee89c2d72847500f",
+    "stderr_hash": "e10268a09c7b62c80c73519819df3a0244adb3e7751802c3d9cf24de",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_pow3-79749ed.stderr b/tests/reference/asr-test_pow3-79749ed.stderr
index 64564988036..631c4bf14d3 100644
--- a/tests/reference/asr-test_pow3-79749ed.stderr
+++ b/tests/reference/asr-test_pow3-79749ed.stderr
@@ -9,3 +9,7 @@ semantic error: Arguments do not match for any generic procedure, pow
   |
 8 |     print(pow(x, a))
   |           ^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_pow4-ef60978.json b/tests/reference/asr-test_pow4-ef60978.json
index 2e98c401ceb..d7db59f1972 100644
--- a/tests/reference/asr-test_pow4-ef60978.json
+++ b/tests/reference/asr-test_pow4-ef60978.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_pow4-ef60978.stderr",
-    "stderr_hash": "ddc8a81609479bf82d256c9cb8d4d54526bd6656632a0d1e2f1ada2c",
+    "stderr_hash": "ca9308b1cd1d33f159f59c7181ed31e75579eb657f066f97604dee84",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_pow4-ef60978.stderr b/tests/reference/asr-test_pow4-ef60978.stderr
index 0663475b445..825dbaaed47 100644
--- a/tests/reference/asr-test_pow4-ef60978.stderr
+++ b/tests/reference/asr-test_pow4-ef60978.stderr
@@ -9,3 +9,7 @@ semantic error: Arguments do not match for any generic procedure, pow
    |
 10 |     print(pow(x, a, b))
    |           ^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_print1-f1f36f1.json b/tests/reference/asr-test_print1-f1f36f1.json
index 0c4988e3a32..e0adc68f516 100644
--- a/tests/reference/asr-test_print1-f1f36f1.json
+++ b/tests/reference/asr-test_print1-f1f36f1.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_print1-f1f36f1.stderr",
-    "stderr_hash": "da6324bcc282ecb93fe6784b206f8a9d8f04ae56341339b13de71bd4",
+    "stderr_hash": "d410c2fa1582a61b0760f4417c734352412008486e9120cdf392c933",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_print1-f1f36f1.stderr b/tests/reference/asr-test_print1-f1f36f1.stderr
index b28bc75a728..13346da034d 100644
--- a/tests/reference/asr-test_print1-f1f36f1.stderr
+++ b/tests/reference/asr-test_print1-f1f36f1.stderr
@@ -3,3 +3,7 @@ semantic error: Separator is expected to be of string type
   |
 2 |     print("a", "b", sep=2)
   |                         ^ Expected string, found: integer
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_print2-64acb15.json b/tests/reference/asr-test_print2-64acb15.json
index 050b4cc6982..c99ecf4788e 100644
--- a/tests/reference/asr-test_print2-64acb15.json
+++ b/tests/reference/asr-test_print2-64acb15.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_print2-64acb15.stderr",
-    "stderr_hash": "e92bba85b957e7034c5172981b3b27ed7b3f0ac62167d82175890bc9",
+    "stderr_hash": "a6e1dac571eb446d22562c399026488538fd181edd7455cf5d2fd92a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_print2-64acb15.stderr b/tests/reference/asr-test_print2-64acb15.stderr
index 6ed1c334b1f..8a2c71172d0 100644
--- a/tests/reference/asr-test_print2-64acb15.stderr
+++ b/tests/reference/asr-test_print2-64acb15.stderr
@@ -3,3 +3,7 @@ semantic error: End is expected to be of string type
   |
 2 |      print("a", "b", end=1)
   |                          ^ Expected string, found: integer
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_return1-2603c9e.json b/tests/reference/asr-test_return1-2603c9e.json
index cc65ed1a6af..f41bf64d242 100644
--- a/tests/reference/asr-test_return1-2603c9e.json
+++ b/tests/reference/asr-test_return1-2603c9e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_return1-2603c9e.stderr",
-    "stderr_hash": "6449cc5e148acf72281e7ef604decd32889ceb27b87052fe8ff8eb50",
+    "stderr_hash": "e15b438a085131755392d90c9b2f3c760d765200844fd13ae44b6efe",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_return1-2603c9e.stderr b/tests/reference/asr-test_return1-2603c9e.stderr
index 82fec8d42d4..5f8496938dc 100644
--- a/tests/reference/asr-test_return1-2603c9e.stderr
+++ b/tests/reference/asr-test_return1-2603c9e.stderr
@@ -3,3 +3,7 @@ semantic error: Type Mismatch in return, found ('f64' and 'i32')
   |
 4 |     return x
   |     ^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_return2-add829b.json b/tests/reference/asr-test_return2-add829b.json
index abdb4461f75..3b6762bb2dd 100644
--- a/tests/reference/asr-test_return2-add829b.json
+++ b/tests/reference/asr-test_return2-add829b.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_return2-add829b.stderr",
-    "stderr_hash": "493f7a8431e00a1bfeb1756b0718b0a40458883c8b9eb379f0c5b536",
+    "stderr_hash": "774b498d1df74f52cd7cd4992c98059f1895a0f5cb182538e79080db",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_return2-add829b.stderr b/tests/reference/asr-test_return2-add829b.stderr
index a9070a952de..152ae041272 100644
--- a/tests/reference/asr-test_return2-add829b.stderr
+++ b/tests/reference/asr-test_return2-add829b.stderr
@@ -3,3 +3,7 @@ semantic error: Return type of function is not defined
   |
 4 |     return x
   |     ^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_set1-11379c7.json b/tests/reference/asr-test_set1-11379c7.json
index 417bba61b82..df336cdc658 100644
--- a/tests/reference/asr-test_set1-11379c7.json
+++ b/tests/reference/asr-test_set1-11379c7.json
@@ -5,9 +5,9 @@
     "infile_hash": "54179c34d3818cd0b57d582c930226ce5443a43386ae981aab02e50b",
     "outfile": null,
     "outfile_hash": null,
-    "stdout": null,
-    "stdout_hash": null,
+    "stdout": "asr-test_set1-11379c7.stdout",
+    "stdout_hash": "857687f9f250fb69bc80b8c9645929d6cb586a0397ce964a15fd81d2",
     "stderr": "asr-test_set1-11379c7.stderr",
-    "stderr_hash": "64dea3d94817d0666cf71481546f7ec61639f47a3b696fe96ae287c6",
-    "returncode": 2
+    "stderr_hash": "e027b0450496c25fb49e362f0f9a98bea7327dc37bdd5da486bc2f69",
+    "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_set1-11379c7.stderr b/tests/reference/asr-test_set1-11379c7.stderr
index f5851bc83d0..9fe2f48e9ad 100644
--- a/tests/reference/asr-test_set1-11379c7.stderr
+++ b/tests/reference/asr-test_set1-11379c7.stderr
@@ -3,3 +3,7 @@ semantic error: Argument to set.add must be of same type as set's element type
   |
 6 |     a.add('err')
   |     ^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_set1-11379c7.stdout b/tests/reference/asr-test_set1-11379c7.stdout
new file mode 100644
index 00000000000..883a3343ea9
--- /dev/null
+++ b/tests/reference/asr-test_set1-11379c7.stdout
@@ -0,0 +1,88 @@
+(TranslationUnit
+    (SymbolTable
+        1
+        {
+            __main__:
+                (Module
+                    (SymbolTable
+                        2
+                        {
+                            test1:
+                                (Function
+                                    (SymbolTable
+                                        3
+                                        {
+                                            a:
+                                                (Variable
+                                                    3
+                                                    a
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (Set
+                                                        (Integer 4)
+                                                    )
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                )
+                                        })
+                                    test1
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    []
+                                    []
+                                    [(Assignment
+                                        (Var 3 a)
+                                        (SetConstant
+                                            [(IntegerConstant 1 (Integer 4))
+                                            (IntegerConstant 2 (Integer 4))
+                                            (IntegerConstant 3 (Integer 4))]
+                                            (Set
+                                                (Integer 4)
+                                            )
+                                        )
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                )
+                        })
+                    __main__
+                    []
+                    .false.
+                    .false.
+                ),
+            main_program:
+                (Program
+                    (SymbolTable
+                        4
+                        {
+                            
+                        })
+                    main_program
+                    []
+                    []
+                )
+        })
+    []
+)
diff --git a/tests/reference/asr-test_set2-d91a6f0.json b/tests/reference/asr-test_set2-d91a6f0.json
index 4c1d7ad258a..1600612a878 100644
--- a/tests/reference/asr-test_set2-d91a6f0.json
+++ b/tests/reference/asr-test_set2-d91a6f0.json
@@ -5,9 +5,9 @@
     "infile_hash": "2d561d934090bedc052b2ef17bc3ac9b59ed94298fd39cbea2c9ba15",
     "outfile": null,
     "outfile_hash": null,
-    "stdout": null,
-    "stdout_hash": null,
+    "stdout": "asr-test_set2-d91a6f0.stdout",
+    "stdout_hash": "857687f9f250fb69bc80b8c9645929d6cb586a0397ce964a15fd81d2",
     "stderr": "asr-test_set2-d91a6f0.stderr",
-    "stderr_hash": "36a3e507b04f030fc4e281ffe82947765ef640b6c558030957bd3e90",
-    "returncode": 2
+    "stderr_hash": "4fae03841fb86eb53e927579d7a9d8baf4759043afb220fff1f450df",
+    "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_set2-d91a6f0.stderr b/tests/reference/asr-test_set2-d91a6f0.stderr
index 29a2683c115..1803823d03c 100644
--- a/tests/reference/asr-test_set2-d91a6f0.stderr
+++ b/tests/reference/asr-test_set2-d91a6f0.stderr
@@ -3,3 +3,7 @@ semantic error: Call to set.remove must have exactly one argument
   |
 6 |     a.remove('error', 'error2')
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_set2-d91a6f0.stdout b/tests/reference/asr-test_set2-d91a6f0.stdout
new file mode 100644
index 00000000000..883a3343ea9
--- /dev/null
+++ b/tests/reference/asr-test_set2-d91a6f0.stdout
@@ -0,0 +1,88 @@
+(TranslationUnit
+    (SymbolTable
+        1
+        {
+            __main__:
+                (Module
+                    (SymbolTable
+                        2
+                        {
+                            test1:
+                                (Function
+                                    (SymbolTable
+                                        3
+                                        {
+                                            a:
+                                                (Variable
+                                                    3
+                                                    a
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (Set
+                                                        (Integer 4)
+                                                    )
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                )
+                                        })
+                                    test1
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    []
+                                    []
+                                    [(Assignment
+                                        (Var 3 a)
+                                        (SetConstant
+                                            [(IntegerConstant 1 (Integer 4))
+                                            (IntegerConstant 2 (Integer 4))
+                                            (IntegerConstant 3 (Integer 4))]
+                                            (Set
+                                                (Integer 4)
+                                            )
+                                        )
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                )
+                        })
+                    __main__
+                    []
+                    .false.
+                    .false.
+                ),
+            main_program:
+                (Program
+                    (SymbolTable
+                        4
+                        {
+                            
+                        })
+                    main_program
+                    []
+                    []
+                )
+        })
+    []
+)
diff --git a/tests/reference/asr-test_set3-f9bbffb.json b/tests/reference/asr-test_set3-f9bbffb.json
index 877113068e1..e9142fb6a05 100644
--- a/tests/reference/asr-test_set3-f9bbffb.json
+++ b/tests/reference/asr-test_set3-f9bbffb.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_set3-f9bbffb.stderr",
-    "stderr_hash": "1ec6cfef0827e97a905c5927de43b74452777394b1f5110e94e5cf97",
+    "stderr_hash": "cc740ba3fe5e858473af83c53e76abf8862b1b3a9e2ef2acf774606a",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_set3-f9bbffb.stderr b/tests/reference/asr-test_set3-f9bbffb.stderr
index ecc3bf61773..156c762d2bb 100644
--- a/tests/reference/asr-test_set3-f9bbffb.stderr
+++ b/tests/reference/asr-test_set3-f9bbffb.stderr
@@ -3,3 +3,7 @@ semantic error: pop() takes no arguments (1 given)
   |
 5 |     i = s.pop(3)
   |         ^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_set4-53fea39.json b/tests/reference/asr-test_set4-53fea39.json
index aad37eb089f..f765383e83b 100644
--- a/tests/reference/asr-test_set4-53fea39.json
+++ b/tests/reference/asr-test_set4-53fea39.json
@@ -5,9 +5,9 @@
     "infile_hash": "3d78c7ad82aa32c3a4cc5f1a7d44e53b81639194f55672ddc99b4d2d",
     "outfile": null,
     "outfile_hash": null,
-    "stdout": null,
-    "stdout_hash": null,
+    "stdout": "asr-test_set4-53fea39.stdout",
+    "stdout_hash": "23bfad9943e2e8e357c231e80e963e3d43273857a5c011ef5739a97e",
     "stderr": "asr-test_set4-53fea39.stderr",
-    "stderr_hash": "d9646bd3609c55ff39f57ca435fedc7dabed530caf28caddc9e58a06",
-    "returncode": 2
+    "stderr_hash": "926265c535aa5cc581a1e427cc1aea9279568b7b56de80e8232d4d7e",
+    "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_set4-53fea39.stderr b/tests/reference/asr-test_set4-53fea39.stderr
index 9ce2e3863cc..c3879154ee0 100644
--- a/tests/reference/asr-test_set4-53fea39.stderr
+++ b/tests/reference/asr-test_set4-53fea39.stderr
@@ -3,3 +3,7 @@ semantic error: Call to set.add must have exactly one argument
   |
 6 |     a.add(3, 4)
   |     ^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_set4-53fea39.stdout b/tests/reference/asr-test_set4-53fea39.stdout
new file mode 100644
index 00000000000..5753962ce28
--- /dev/null
+++ b/tests/reference/asr-test_set4-53fea39.stdout
@@ -0,0 +1,88 @@
+(TranslationUnit
+    (SymbolTable
+        1
+        {
+            __main__:
+                (Module
+                    (SymbolTable
+                        2
+                        {
+                            test4:
+                                (Function
+                                    (SymbolTable
+                                        3
+                                        {
+                                            a:
+                                                (Variable
+                                                    3
+                                                    a
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (Set
+                                                        (Integer 4)
+                                                    )
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                )
+                                        })
+                                    test4
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    []
+                                    []
+                                    [(Assignment
+                                        (Var 3 a)
+                                        (SetConstant
+                                            [(IntegerConstant 1 (Integer 4))
+                                            (IntegerConstant 2 (Integer 4))
+                                            (IntegerConstant 3 (Integer 4))]
+                                            (Set
+                                                (Integer 4)
+                                            )
+                                        )
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                )
+                        })
+                    __main__
+                    []
+                    .false.
+                    .false.
+                ),
+            main_program:
+                (Program
+                    (SymbolTable
+                        4
+                        {
+                            
+                        })
+                    main_program
+                    []
+                    []
+                )
+        })
+    []
+)
diff --git a/tests/reference/asr-test_set_indexing-a1c21b8.json b/tests/reference/asr-test_set_indexing-a1c21b8.json
index 6bb6e96be35..c98fd7babc6 100644
--- a/tests/reference/asr-test_set_indexing-a1c21b8.json
+++ b/tests/reference/asr-test_set_indexing-a1c21b8.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_set_indexing-a1c21b8.stderr",
-    "stderr_hash": "fe69096aca9c3be072acac0e28081e5378f30d4ba335176abc76c555",
+    "stderr_hash": "8c029f85f2a003973287c72d0e800a5723a4e408cf9d697b1d98fc18",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_set_indexing-a1c21b8.stderr b/tests/reference/asr-test_set_indexing-a1c21b8.stderr
index 1a7be881565..cb502632db1 100644
--- a/tests/reference/asr-test_set_indexing-a1c21b8.stderr
+++ b/tests/reference/asr-test_set_indexing-a1c21b8.stderr
@@ -3,3 +3,7 @@ semantic error: 'set' object is not subscriptable
   |
 7 |     a = s[0]
   |         ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_capitalize-9f8dfa9.json b/tests/reference/asr-test_str_capitalize-9f8dfa9.json
index 88a959a54da..d3d78923fc3 100644
--- a/tests/reference/asr-test_str_capitalize-9f8dfa9.json
+++ b/tests/reference/asr-test_str_capitalize-9f8dfa9.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_capitalize-9f8dfa9.stderr",
-    "stderr_hash": "7dea3deffeee54e7f479d4c0dbcd7b5aab3b1a28e4a568adfb52cf51",
+    "stderr_hash": "7da52775a48272ea41acf548fc9b0230c4978de9263ae0e06f22a6ff",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_capitalize-9f8dfa9.stderr b/tests/reference/asr-test_str_capitalize-9f8dfa9.stderr
index c04687d5728..3898e44e766 100644
--- a/tests/reference/asr-test_str_capitalize-9f8dfa9.stderr
+++ b/tests/reference/asr-test_str_capitalize-9f8dfa9.stderr
@@ -3,3 +3,7 @@ semantic error: str.capitalize() takes no arguments
   |
 4 |     s = s.capitalize(23)
   |         ^^^^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_indexing-b200a4e.json b/tests/reference/asr-test_str_indexing-b200a4e.json
index 1193d8bad76..47a68e0897a 100644
--- a/tests/reference/asr-test_str_indexing-b200a4e.json
+++ b/tests/reference/asr-test_str_indexing-b200a4e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_indexing-b200a4e.stderr",
-    "stderr_hash": "eddc45a6ba83dc10551fd9685b6ea1096828ae29f6b9cce07cfe5de1",
+    "stderr_hash": "0219e81533d69f5cf7a5664282908bf507ace1a571febcf7c2938698",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_indexing-b200a4e.stderr b/tests/reference/asr-test_str_indexing-b200a4e.stderr
index fb521217df0..64311de077a 100644
--- a/tests/reference/asr-test_str_indexing-b200a4e.stderr
+++ b/tests/reference/asr-test_str_indexing-b200a4e.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in index, expected a single integer or slice
   |
 4 |     print(s[1.2])
   |             ^^^ type mismatch (found: 'f64', expected: 'i32' or slice)
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_slicing-eca1381.json b/tests/reference/asr-test_str_slicing-eca1381.json
index 684a869d6a1..51efc8dc650 100644
--- a/tests/reference/asr-test_str_slicing-eca1381.json
+++ b/tests/reference/asr-test_str_slicing-eca1381.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_slicing-eca1381.stderr",
-    "stderr_hash": "7374319e4378d1cc717e1bab3f68f207cb90c40c168d5700c77d189b",
+    "stderr_hash": "2b843ddc51109f0b9edeb15655b9c5fab27ca0b521b74da99ab50351",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_slicing-eca1381.stderr b/tests/reference/asr-test_str_slicing-eca1381.stderr
index d50b2ffd945..c8bef51c648 100644
--- a/tests/reference/asr-test_str_slicing-eca1381.stderr
+++ b/tests/reference/asr-test_str_slicing-eca1381.stderr
@@ -3,3 +3,7 @@ semantic error: slice indices must be integers or None
   |
 4 |     print(s[1:2.2])
   |               ^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_slicing2-2f07e9a.json b/tests/reference/asr-test_str_slicing2-2f07e9a.json
index dc63e9a7b0a..52f94de8a59 100644
--- a/tests/reference/asr-test_str_slicing2-2f07e9a.json
+++ b/tests/reference/asr-test_str_slicing2-2f07e9a.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_slicing2-2f07e9a.stderr",
-    "stderr_hash": "48a9286126c2333bdf5237358bd4ad27acac4a16a78069c9bd36d089",
+    "stderr_hash": "ad9eb0eea074a4462ebc45713d14d3b6e11e2c4ca86c82f053f53a25",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_slicing2-2f07e9a.stderr b/tests/reference/asr-test_str_slicing2-2f07e9a.stderr
index 94a5f032593..edea305c9ee 100644
--- a/tests/reference/asr-test_str_slicing2-2f07e9a.stderr
+++ b/tests/reference/asr-test_str_slicing2-2f07e9a.stderr
@@ -3,3 +3,7 @@ semantic error: slice indices must be integers or None
   |
 4 |     print(s[1.5:3])
   |             ^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_slicing3-fe6a03c.json b/tests/reference/asr-test_str_slicing3-fe6a03c.json
index d1fe49fdfe8..8e12247a837 100644
--- a/tests/reference/asr-test_str_slicing3-fe6a03c.json
+++ b/tests/reference/asr-test_str_slicing3-fe6a03c.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_slicing3-fe6a03c.stderr",
-    "stderr_hash": "5f7553d1509bed25d5137abc4fc2cb1d2cb983a1fab81d8d178ed197",
+    "stderr_hash": "d5d6a1b00748dccfea12a4e78c3047d22cee746035e20953bff636ee",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_slicing3-fe6a03c.stderr b/tests/reference/asr-test_str_slicing3-fe6a03c.stderr
index b1180c30aef..8833eb55391 100644
--- a/tests/reference/asr-test_str_slicing3-fe6a03c.stderr
+++ b/tests/reference/asr-test_str_slicing3-fe6a03c.stderr
@@ -3,3 +3,7 @@ semantic error: slice indices must be integers or None
   |
 4 |     print(s[1:3:0.5])
   |                 ^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_slicing4-a0c7a69.json b/tests/reference/asr-test_str_slicing4-a0c7a69.json
index ceff8659bbb..9203e1aae93 100644
--- a/tests/reference/asr-test_str_slicing4-a0c7a69.json
+++ b/tests/reference/asr-test_str_slicing4-a0c7a69.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_slicing4-a0c7a69.stderr",
-    "stderr_hash": "a5dd047df86649936606a0b134d10e76c6aacb224319be4aefd64bfe",
+    "stderr_hash": "09940a012368e10f6c63113d8eef43973da2570f1e3eda18b4db1016",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_slicing4-a0c7a69.stderr b/tests/reference/asr-test_str_slicing4-a0c7a69.stderr
index 8709b99ee83..3888ac89a44 100644
--- a/tests/reference/asr-test_str_slicing4-a0c7a69.stderr
+++ b/tests/reference/asr-test_str_slicing4-a0c7a69.stderr
@@ -3,3 +3,7 @@ semantic error: slice step cannot be zero
   |
 4 |     print(s[0:1:0])
   |                 ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_str_to_int-61553e7.json b/tests/reference/asr-test_str_to_int-61553e7.json
index ac1093b9c8d..78e8f24156d 100644
--- a/tests/reference/asr-test_str_to_int-61553e7.json
+++ b/tests/reference/asr-test_str_to_int-61553e7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_str_to_int-61553e7.stderr",
-    "stderr_hash": "1998e37d9abe044f164c73ea1e000ce748ed43af5ea14c2eb4715f11",
+    "stderr_hash": "18dc06e9636f1028811bf8add4615471ff55ced13de0bb9c6c9c35c6",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_str_to_int-61553e7.stderr b/tests/reference/asr-test_str_to_int-61553e7.stderr
index 785d95ba7f9..f96780d8665 100644
--- a/tests/reference/asr-test_str_to_int-61553e7.stderr
+++ b/tests/reference/asr-test_str_to_int-61553e7.stderr
@@ -3,3 +3,7 @@ semantic error: invalid literal for int() with base 10: '3abc'
   |
 2 |     print(int('3abc'))
   |               ^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_tuple1-7abe88f.json b/tests/reference/asr-test_tuple1-7abe88f.json
index e308970eea4..dab943945da 100644
--- a/tests/reference/asr-test_tuple1-7abe88f.json
+++ b/tests/reference/asr-test_tuple1-7abe88f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_tuple1-7abe88f.stderr",
-    "stderr_hash": "56df3d46c63077fcdd09c3b54b63e6e096d7d39b2f8cfb61dab0930a",
+    "stderr_hash": "e7c4c4d58e01c5214ed5347828ca2b067a54a3525ee036ac564d6001",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_tuple1-7abe88f.stderr b/tests/reference/asr-test_tuple1-7abe88f.stderr
index c66cc649468..5f2473b23ad 100644
--- a/tests/reference/asr-test_tuple1-7abe88f.stderr
+++ b/tests/reference/asr-test_tuple1-7abe88f.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in assignment, the types must be compatible
   |
 3 |   t = (1, 2)
   |   ^   ^^^^^^ type mismatch ('tuple[i32, str]' and 'tuple[i32, i32]')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_tuple2-b046610.json b/tests/reference/asr-test_tuple2-b046610.json
index 051ed20bfb7..f6c6125d0b6 100644
--- a/tests/reference/asr-test_tuple2-b046610.json
+++ b/tests/reference/asr-test_tuple2-b046610.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_tuple2-b046610.stderr",
-    "stderr_hash": "1e22bbde9c9fdc171314f1158dcac6bf6373d94e00c9878f66d7b667",
+    "stderr_hash": "6e5fabb92f9ff098bd66a44fc35fa3ad474ec51d76277166a474552b",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_tuple2-b046610.stderr b/tests/reference/asr-test_tuple2-b046610.stderr
index e99518093e3..a32a938a78f 100644
--- a/tests/reference/asr-test_tuple2-b046610.stderr
+++ b/tests/reference/asr-test_tuple2-b046610.stderr
@@ -3,3 +3,7 @@ semantic error: Runtime Indexing with tuple[i32, i32, i32] is not possible.
   |
 4 |     print(t[x])
   |           ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_tuple3-19fa47f.json b/tests/reference/asr-test_tuple3-19fa47f.json
index 0a703f17d46..d1674c36aaf 100644
--- a/tests/reference/asr-test_tuple3-19fa47f.json
+++ b/tests/reference/asr-test_tuple3-19fa47f.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_tuple3-19fa47f.stderr",
-    "stderr_hash": "780d951c4bfa3476ee84d16d9a89c5a9255691b270bfb312d974608e",
+    "stderr_hash": "842e7a83a11ec5b255d3891c08438a4ce4b0e1a375b754d69434db93",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_tuple3-19fa47f.stderr b/tests/reference/asr-test_tuple3-19fa47f.stderr
index fe438fb3821..4e4d47db237 100644
--- a/tests/reference/asr-test_tuple3-19fa47f.stderr
+++ b/tests/reference/asr-test_tuple3-19fa47f.stderr
@@ -3,3 +3,7 @@ semantic error: Tuple index out of bounds
   |
 3 |     print(t[-4])
   |           ^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_type_mismatch_01-09e8af3.json b/tests/reference/asr-test_type_mismatch_01-09e8af3.json
index ce2513c9350..929c2262582 100644
--- a/tests/reference/asr-test_type_mismatch_01-09e8af3.json
+++ b/tests/reference/asr-test_type_mismatch_01-09e8af3.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_type_mismatch_01-09e8af3.stderr",
-    "stderr_hash": "78ff11b22438e133b740e778063db612841fb15ef00f8599bdf8602c",
+    "stderr_hash": "f7d859ea11d62a6c968ba5dcd8b9c8507f584beaaa6a48198e476f7d",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_type_mismatch_01-09e8af3.stderr b/tests/reference/asr-test_type_mismatch_01-09e8af3.stderr
index 3dc100fad67..cbbed3fb965 100644
--- a/tests/reference/asr-test_type_mismatch_01-09e8af3.stderr
+++ b/tests/reference/asr-test_type_mismatch_01-09e8af3.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in shorthand operator, the types must be compatibl
   |
 6 |     a /= b
   |     ^    ^ type mismatch ('i32' and 'f64')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_unary_op_03-e799eae.json b/tests/reference/asr-test_unary_op_03-e799eae.json
index e3cad84dd52..025e9de9a2f 100644
--- a/tests/reference/asr-test_unary_op_03-e799eae.json
+++ b/tests/reference/asr-test_unary_op_03-e799eae.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-test_unary_op_03-e799eae.stdout",
-    "stdout_hash": "4511db7e0936003a81bcb4c6b4c1cbc60070f29a9fd7dd04e8d3d137",
+    "stdout_hash": "15a19e670176a5670449287ffdb4a8b399018063c96175874a826507",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-test_unary_op_03-e799eae.stdout b/tests/reference/asr-test_unary_op_03-e799eae.stdout
index e4cdc4204fe..858f09690f7 100644
--- a/tests/reference/asr-test_unary_op_03-e799eae.stdout
+++ b/tests/reference/asr-test_unary_op_03-e799eae.stdout
@@ -98,12 +98,12 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 i)
                                         (IntegerConstant 5 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 res)
                                         (IntegerBitNot
                                             (Var 3 i)
@@ -126,7 +126,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 i)
                                         (IntegerUnaryMinus
                                             (IntegerConstant 235346 (Integer 4))
diff --git a/tests/reference/asr-test_unsupported_type-0d813dd.json b/tests/reference/asr-test_unsupported_type-0d813dd.json
index ab828c49dad..830a68264cc 100644
--- a/tests/reference/asr-test_unsupported_type-0d813dd.json
+++ b/tests/reference/asr-test_unsupported_type-0d813dd.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_unsupported_type-0d813dd.stderr",
-    "stderr_hash": "df2464bbcb9d52d4dbe40236762e965b1b771406f16ef90cf53b8611",
+    "stderr_hash": "21fc45a6699d6b420540b4b862766fc022ac9978ceffc10c2b613c25",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_unsupported_type-0d813dd.stderr b/tests/reference/asr-test_unsupported_type-0d813dd.stderr
index b5e52498137..d720e3ea49a 100644
--- a/tests/reference/asr-test_unsupported_type-0d813dd.stderr
+++ b/tests/reference/asr-test_unsupported_type-0d813dd.stderr
@@ -3,3 +3,7 @@ semantic error: The type 'i128' is undeclared.
   |
 2 |     i: i128
   |        ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_zero_division-3dd84e8.json b/tests/reference/asr-test_zero_division-3dd84e8.json
index 5c135e76d43..bce9c5dd5fd 100644
--- a/tests/reference/asr-test_zero_division-3dd84e8.json
+++ b/tests/reference/asr-test_zero_division-3dd84e8.json
@@ -5,9 +5,9 @@
     "infile_hash": "cef09721d9ea9f3846f213e1b1718f2aac2edba08d555af776293504",
     "outfile": null,
     "outfile_hash": null,
-    "stdout": null,
-    "stdout_hash": null,
-    "stderr": "asr-test_zero_division-3dd84e8.stderr",
-    "stderr_hash": "e1770a0ba87c5155926e3d6bb3bd67e14a5c040b7584c4cf114a41b2",
-    "returncode": 2
+    "stdout": "asr-test_zero_division-3dd84e8.stdout",
+    "stdout_hash": "ef34e51b3fe2cf233a43091adee05bccf5c782d5cc9df1a2d0afe64c",
+    "stderr": null,
+    "stderr_hash": null,
+    "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_zero_division-3dd84e8.stdout b/tests/reference/asr-test_zero_division-3dd84e8.stdout
new file mode 100644
index 00000000000..3a6e590a201
--- /dev/null
+++ b/tests/reference/asr-test_zero_division-3dd84e8.stdout
@@ -0,0 +1,141 @@
+(TranslationUnit
+    (SymbolTable
+        1
+        {
+            __main__:
+                (Module
+                    (SymbolTable
+                        2
+                        {
+                            __main__global_stmts:
+                                (Function
+                                    (SymbolTable
+                                        4
+                                        {
+                                            
+                                        })
+                                    __main__global_stmts
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    [f]
+                                    []
+                                    [(SubroutineCall
+                                        2 f
+                                        ()
+                                        []
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                ),
+                            f:
+                                (Function
+                                    (SymbolTable
+                                        3
+                                        {
+                                            i:
+                                                (Variable
+                                                    3
+                                                    i
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (Integer 4)
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                )
+                                        })
+                                    f
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    []
+                                    []
+                                    [(Assignment
+                                        (Var 3 i)
+                                        (IntegerConstant 4 (Integer 4))
+                                        ()
+                                    )
+                                    (Print
+                                        [(IntrinsicElementalFunction
+                                            FloorDiv
+                                            [(Var 3 i)
+                                            (IntegerConstant 0 (Integer 4))]
+                                            0
+                                            (Integer 4)
+                                            ()
+                                        )]
+                                        ()
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                )
+                        })
+                    __main__
+                    []
+                    .false.
+                    .false.
+                ),
+            main_program:
+                (Program
+                    (SymbolTable
+                        5
+                        {
+                            __main__global_stmts:
+                                (ExternalSymbol
+                                    5
+                                    __main__global_stmts
+                                    2 __main__global_stmts
+                                    __main__
+                                    []
+                                    __main__global_stmts
+                                    Public
+                                )
+                        })
+                    main_program
+                    [__main__]
+                    [(SubroutineCall
+                        5 __main__global_stmts
+                        2 __main__global_stmts
+                        []
+                        ()
+                    )]
+                )
+        })
+    []
+)
diff --git a/tests/reference/asr-test_zero_division2-d84989f.json b/tests/reference/asr-test_zero_division2-d84989f.json
index f1fb7cbb0e8..d5d4f636d51 100644
--- a/tests/reference/asr-test_zero_division2-d84989f.json
+++ b/tests/reference/asr-test_zero_division2-d84989f.json
@@ -5,9 +5,9 @@
     "infile_hash": "0ddca188fc2e8d665c5af0d438e34ed8afe255611320caa3a27ed483",
     "outfile": null,
     "outfile_hash": null,
-    "stdout": null,
-    "stdout_hash": null,
-    "stderr": "asr-test_zero_division2-d84989f.stderr",
-    "stderr_hash": "d2bac61e7df0875a7c93edb706661c80154b7b4d05dbf26663c36176",
-    "returncode": 2
+    "stdout": "asr-test_zero_division2-d84989f.stdout",
+    "stdout_hash": "726cdac1b505c25ff2737167120685da62c20c9c42852b35b74888e1",
+    "stderr": null,
+    "stderr_hash": null,
+    "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_zero_division2-d84989f.stdout b/tests/reference/asr-test_zero_division2-d84989f.stdout
new file mode 100644
index 00000000000..4e1d3599b09
--- /dev/null
+++ b/tests/reference/asr-test_zero_division2-d84989f.stdout
@@ -0,0 +1,147 @@
+(TranslationUnit
+    (SymbolTable
+        1
+        {
+            __main__:
+                (Module
+                    (SymbolTable
+                        2
+                        {
+                            __main__global_stmts:
+                                (Function
+                                    (SymbolTable
+                                        4
+                                        {
+                                            
+                                        })
+                                    __main__global_stmts
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    [f]
+                                    []
+                                    [(SubroutineCall
+                                        2 f
+                                        ()
+                                        []
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                ),
+                            f:
+                                (Function
+                                    (SymbolTable
+                                        3
+                                        {
+                                            v:
+                                                (Variable
+                                                    3
+                                                    v
+                                                    []
+                                                    Local
+                                                    ()
+                                                    ()
+                                                    Default
+                                                    (Real 8)
+                                                    ()
+                                                    Source
+                                                    Public
+                                                    Required
+                                                    .false.
+                                                )
+                                        })
+                                    f
+                                    (FunctionType
+                                        []
+                                        ()
+                                        Source
+                                        Implementation
+                                        ()
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        .false.
+                                        []
+                                        .false.
+                                    )
+                                    []
+                                    []
+                                    [(Assignment
+                                        (Var 3 v)
+                                        (RealConstant
+                                            4.000000
+                                            (Real 8)
+                                        )
+                                        ()
+                                    )
+                                    (Print
+                                        [(IntrinsicElementalFunction
+                                            FloorDiv
+                                            [(Var 3 v)
+                                            (RealConstant
+                                                0.000000
+                                                (Real 8)
+                                            )]
+                                            0
+                                            (Real 8)
+                                            ()
+                                        )]
+                                        ()
+                                        ()
+                                    )]
+                                    ()
+                                    Public
+                                    .false.
+                                    .false.
+                                    ()
+                                )
+                        })
+                    __main__
+                    []
+                    .false.
+                    .false.
+                ),
+            main_program:
+                (Program
+                    (SymbolTable
+                        5
+                        {
+                            __main__global_stmts:
+                                (ExternalSymbol
+                                    5
+                                    __main__global_stmts
+                                    2 __main__global_stmts
+                                    __main__
+                                    []
+                                    __main__global_stmts
+                                    Public
+                                )
+                        })
+                    main_program
+                    [__main__]
+                    [(SubroutineCall
+                        5 __main__global_stmts
+                        2 __main__global_stmts
+                        []
+                        ()
+                    )]
+                )
+        })
+    []
+)
diff --git a/tests/reference/asr-test_zero_division3-29efb9e.json b/tests/reference/asr-test_zero_division3-29efb9e.json
index 0c4f4b3d5d3..b564c04e242 100644
--- a/tests/reference/asr-test_zero_division3-29efb9e.json
+++ b/tests/reference/asr-test_zero_division3-29efb9e.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_zero_division3-29efb9e.stderr",
-    "stderr_hash": "061f891a72cebaa335b5db060b27e04f21f6a09d150f78f1a572c135",
+    "stderr_hash": "a74c3ad340a5b24ffc911bbdb579d30825cb802c2449e86f34d12fc1",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_zero_division3-29efb9e.stderr b/tests/reference/asr-test_zero_division3-29efb9e.stderr
index 519946bb811..75c2b32f45c 100644
--- a/tests/reference/asr-test_zero_division3-29efb9e.stderr
+++ b/tests/reference/asr-test_zero_division3-29efb9e.stderr
@@ -3,3 +3,7 @@ semantic error: division by zero is not allowed
   |
 3 |     print(i/0)
   |             ^ division by zero
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-test_zero_division4-bf4af64.json b/tests/reference/asr-test_zero_division4-bf4af64.json
index e1f6ce6bc07..b5907afe878 100644
--- a/tests/reference/asr-test_zero_division4-bf4af64.json
+++ b/tests/reference/asr-test_zero_division4-bf4af64.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-test_zero_division4-bf4af64.stderr",
-    "stderr_hash": "1d16ac2d95ab997ff9b94f4028d8741121e41471445179d185264884",
+    "stderr_hash": "514f4599064030f7b57f47d9f18d675203a94ccdb95fe5d81295db96",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-test_zero_division4-bf4af64.stderr b/tests/reference/asr-test_zero_division4-bf4af64.stderr
index bdf0d76816c..23b24e3fa30 100644
--- a/tests/reference/asr-test_zero_division4-bf4af64.stderr
+++ b/tests/reference/asr-test_zero_division4-bf4af64.stderr
@@ -3,3 +3,7 @@ semantic error: division by zero is not allowed
   |
 5 |     print(f/0.0)
   |             ^^^ division by zero
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-tuple1-09972ab.json b/tests/reference/asr-tuple1-09972ab.json
index a8e83fae284..e72fc9f4948 100644
--- a/tests/reference/asr-tuple1-09972ab.json
+++ b/tests/reference/asr-tuple1-09972ab.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-tuple1-09972ab.stdout",
-    "stdout_hash": "fcbdc7bd437d77534509c9da987f7b735c1bd319de51956b28924f73",
+    "stdout_hash": "8d34b15fa3ca19f09a6b0358145ca1b279a67be381729efad479b662",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-tuple1-09972ab.stdout b/tests/reference/asr-tuple1-09972ab.stdout
index d4bcbe5dada..8239da91fb5 100644
--- a/tests/reference/asr-tuple1-09972ab.stdout
+++ b/tests/reference/asr-tuple1-09972ab.stdout
@@ -263,7 +263,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a1)
                                         (TupleConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -277,7 +277,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a1)
                                         (TupleConstant
                                             [(IntegerUnaryMinus
@@ -303,7 +303,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a2)
                                         (TupleConstant
                                             [(StringConstant
@@ -326,7 +326,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 float_mem)
                                         (Cast
                                             (RealConstant
@@ -342,7 +342,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a3)
                                         (TupleConstant
                                             [(IntegerUnaryMinus
@@ -369,7 +369,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a4)
                                         (TupleConstant
                                             [(TupleConstant
@@ -407,7 +407,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 float_mem1)
                                         (Cast
                                             (RealConstant
@@ -423,7 +423,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 float_mem2)
                                         (Cast
                                             (RealConstant
@@ -439,7 +439,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a5)
                                         (TupleConstant
                                             [(TupleConstant
@@ -486,7 +486,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b0)
                                         (TupleItem
                                             (Var 3 a1)
@@ -496,7 +496,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (TupleConstant
                                             [(Var 3 b0)
                                             (Var 3 b1)]
@@ -525,7 +525,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 a11)
                                         (TupleConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -537,7 +537,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b11)
                                         (TupleConstant
                                             [(IntegerConstant 1 (Integer 4))
diff --git a/tests/reference/asr-type_mismatch-61052c7.json b/tests/reference/asr-type_mismatch-61052c7.json
index 80ce9f69b3c..66dde5f7f14 100644
--- a/tests/reference/asr-type_mismatch-61052c7.json
+++ b/tests/reference/asr-type_mismatch-61052c7.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-type_mismatch-61052c7.stderr",
-    "stderr_hash": "8c0de9edb133ff8cfa5c0e7c6b2a8d425c5d84a5ec98844eb367040c",
+    "stderr_hash": "b5474d2ae119f3be899c38b058af70e24aac3cbe38b17e8e7e57e0e7",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-type_mismatch-61052c7.stderr b/tests/reference/asr-type_mismatch-61052c7.stderr
index 6a402fb67ca..2597c4e0777 100644
--- a/tests/reference/asr-type_mismatch-61052c7.stderr
+++ b/tests/reference/asr-type_mismatch-61052c7.stderr
@@ -3,3 +3,7 @@ semantic error: Type mismatch in shorthand operator, the types must be compatibl
   |
 8 |     a *= b
   |     ^    ^ type mismatch ('i32' and 'f32')
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-unsigned_01-892b178.json b/tests/reference/asr-unsigned_01-892b178.json
index 0a797a2c113..8fc2de6a31d 100644
--- a/tests/reference/asr-unsigned_01-892b178.json
+++ b/tests/reference/asr-unsigned_01-892b178.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-unsigned_01-892b178.stderr",
-    "stderr_hash": "54c7cfbd16c73cbe802a3492cd9c9e8d2fb25035192d229232c377b2",
+    "stderr_hash": "f19389db60f2168bed6694b7a2fc796362a9e5df5a5f5c0b63ee9ab0",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-unsigned_01-892b178.stderr b/tests/reference/asr-unsigned_01-892b178.stderr
index c3526cf36e6..f30017b04b1 100644
--- a/tests/reference/asr-unsigned_01-892b178.stderr
+++ b/tests/reference/asr-unsigned_01-892b178.stderr
@@ -3,3 +3,7 @@ semantic error: Cannot cast negative value to unsigned integer
   |
 3 | i: u16 = u16(-5)
   |          ^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-unsigned_02-6563e58.json b/tests/reference/asr-unsigned_02-6563e58.json
index 40e7b2a0f0f..a035a634e32 100644
--- a/tests/reference/asr-unsigned_02-6563e58.json
+++ b/tests/reference/asr-unsigned_02-6563e58.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-unsigned_02-6563e58.stderr",
-    "stderr_hash": "93f2cf309dfa7f13d56df9184615fde6a832b79510d8541f95ad5a70",
+    "stderr_hash": "48d94d3244a0f54eef37ac93bb7da8bd2be35c3a971e4a1a0babeda4",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-unsigned_02-6563e58.stderr b/tests/reference/asr-unsigned_02-6563e58.stderr
index d00c5647fdc..b510a16155c 100644
--- a/tests/reference/asr-unsigned_02-6563e58.stderr
+++ b/tests/reference/asr-unsigned_02-6563e58.stderr
@@ -3,3 +3,7 @@ semantic error: The result of the unary minus `-` operation is negative, thus ou
   |
 3 | i: u16 = -u16(5)
   |          ^^^^^^^ use -i32(u) for signed result
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-unsigned_03-f785652.json b/tests/reference/asr-unsigned_03-f785652.json
index 6929c59a27c..e9ed5cb7d74 100644
--- a/tests/reference/asr-unsigned_03-f785652.json
+++ b/tests/reference/asr-unsigned_03-f785652.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-unsigned_03-f785652.stderr",
-    "stderr_hash": "d90013a25d9aaa91fbbf2b1193cd06be94a4e716f0fe99771cde5601",
+    "stderr_hash": "acf949ff5d4a2eafc20b9c2ccb96fdf9b45b43bd4ef3c9651e14e5dc",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-unsigned_03-f785652.stderr b/tests/reference/asr-unsigned_03-f785652.stderr
index a68ae96697d..5e7e5b8b4a9 100644
--- a/tests/reference/asr-unsigned_03-f785652.stderr
+++ b/tests/reference/asr-unsigned_03-f785652.stderr
@@ -3,3 +3,7 @@ semantic error: The result of the unary minus `-` operation is negative, thus ou
   |
 3 | print(-u64(u32(10)))
   |       ^^^^^^^^^^^^^ use -i64(u) for signed result
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-unsigned_04-c856d3a.json b/tests/reference/asr-unsigned_04-c856d3a.json
index 3753e9ae308..93d267b30cf 100644
--- a/tests/reference/asr-unsigned_04-c856d3a.json
+++ b/tests/reference/asr-unsigned_04-c856d3a.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-unsigned_04-c856d3a.stderr",
-    "stderr_hash": "3dcdf2e97f8c5f2816bed266587c7c3743f666cf2a4602f65e8ec9b8",
+    "stderr_hash": "1836dc76ffbf584fbff929aab3ce104b7004dd3729459c313cc7adb9",
     "returncode": 2
 }
\ No newline at end of file
diff --git a/tests/reference/asr-unsigned_04-c856d3a.stderr b/tests/reference/asr-unsigned_04-c856d3a.stderr
index 8547a0848c1..829c2bc86a8 100644
--- a/tests/reference/asr-unsigned_04-c856d3a.stderr
+++ b/tests/reference/asr-unsigned_04-c856d3a.stderr
@@ -3,3 +3,7 @@ semantic error: The result of the bitnot ~ operation is negative, thus out of ra
   |
 4 | i = ~i
   |     ^^ use ~i32(u) for signed result or bitnot_u16(u) for unsigned result
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/asr-vec_01-66ac423.json b/tests/reference/asr-vec_01-66ac423.json
index 0eccea5f38a..996baeb0f39 100644
--- a/tests/reference/asr-vec_01-66ac423.json
+++ b/tests/reference/asr-vec_01-66ac423.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-vec_01-66ac423.stdout",
-    "stdout_hash": "3322da0205ca932ee6037839d41a406a93609339bc4b3bbbe0a88638",
+    "stdout_hash": "4b766cc5368d34ae43b8f00bcf9fe26bfee8ffb23452f0929e784b8f",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/asr-vec_01-66ac423.stdout b/tests/reference/asr-vec_01-66ac423.stdout
index 0dc4ab1dd52..98515083354 100644
--- a/tests/reference/asr-vec_01-66ac423.stdout
+++ b/tests/reference/asr-vec_01-66ac423.stdout
@@ -124,9 +124,9 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 220 a)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -134,13 +134,14 @@
                                                 (IntegerConstant 9216 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 b)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -148,6 +149,7 @@
                                                 (IntegerConstant 9216 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -164,7 +166,7 @@
                                             (IntegerConstant 9215 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 220 b)
                                                 [(()
@@ -194,7 +196,7 @@
                                             (IntegerConstant 9215 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 220 a)
                                                 [(()
diff --git a/tests/reference/ast-prefix_string_01-cf221fd.json b/tests/reference/ast-prefix_string_01-cf221fd.json
index ed1984236ea..7b35875d684 100644
--- a/tests/reference/ast-prefix_string_01-cf221fd.json
+++ b/tests/reference/ast-prefix_string_01-cf221fd.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "ast-prefix_string_01-cf221fd.stderr",
-    "stderr_hash": "b600057f41f59ba7fdebe3971bfea0eadca972747ccf70d575c1cdcd",
+    "stderr_hash": "01778a489f20dcff14eb922861f176cb7b5998337b0688af164af6e2",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/ast-prefix_string_01-cf221fd.stderr b/tests/reference/ast-prefix_string_01-cf221fd.stderr
index e2a05a52c70..12dd736d4d1 100644
--- a/tests/reference/ast-prefix_string_01-cf221fd.stderr
+++ b/tests/reference/ast-prefix_string_01-cf221fd.stderr
@@ -3,3 +3,7 @@ syntax error: Token '"Hello"' (of type 'string') is unexpected here
   |
 3 |     print "Hello", "World" 
   |           ^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/ast-prefix_string_02-3d530b2.json b/tests/reference/ast-prefix_string_02-3d530b2.json
index 9c3ce1081b5..1e9358fc959 100644
--- a/tests/reference/ast-prefix_string_02-3d530b2.json
+++ b/tests/reference/ast-prefix_string_02-3d530b2.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "ast-prefix_string_02-3d530b2.stderr",
-    "stderr_hash": "cd72affed29823c0364d52bfb3ba0674d9d7950390b7cd6b04f7538b",
+    "stderr_hash": "f85ac10d8c4cec3da1256b5b69cc6b383a1c2a66b21e30d094b477fa",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/ast-prefix_string_02-3d530b2.stderr b/tests/reference/ast-prefix_string_02-3d530b2.stderr
index 869d52864a7..6197e0b89e7 100644
--- a/tests/reference/ast-prefix_string_02-3d530b2.stderr
+++ b/tests/reference/ast-prefix_string_02-3d530b2.stderr
@@ -3,3 +3,7 @@ syntax error: Token '"Hello World"' (of type 'string') is unexpected here
   |
 7 |     print(r "Hello World")
   |             ^^^^^^^^^^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/c-expr7-bb2692a.json b/tests/reference/c-expr7-bb2692a.json
index 84ee9e5ed52..1b8797d6e8a 100644
--- a/tests/reference/c-expr7-bb2692a.json
+++ b/tests/reference/c-expr7-bb2692a.json
@@ -6,8 +6,8 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "c-expr7-bb2692a.stdout",
-    "stdout_hash": "1d75b4cf61dcee73adafec2a5448c953bae5476aab2502115df2eecb",
+    "stdout_hash": "92e36dc1146bef152cab7c8086ce6de203a3d966dc5415331bd27257",
     "stderr": "c-expr7-bb2692a.stderr",
-    "stderr_hash": "6e9790ac88db1a9ead8f64a91ba8a6605de67167037908a74b77be0c",
+    "stderr_hash": "14266d9eecb4272a8102f9495568abd799c50f1741a894f56101ddd8",
     "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/c-expr7-bb2692a.stderr b/tests/reference/c-expr7-bb2692a.stderr
index a4fad29beb7..3658b5c161b 100644
--- a/tests/reference/c-expr7-bb2692a.stderr
+++ b/tests/reference/c-expr7-bb2692a.stderr
@@ -9,3 +9,7 @@ style suggestion: Could have used '**' instead of 'pow'
   |
 8 |     res = i32(pow(a, b))
   |               ^^^^^^^^^ '**' could be used instead
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/c-expr7-bb2692a.stdout b/tests/reference/c-expr7-bb2692a.stdout
index b85fda16c9a..cfd6f33429a 100644
--- a/tests/reference/c-expr7-bb2692a.stdout
+++ b/tests/reference/c-expr7-bb2692a.stdout
@@ -8,26 +8,6 @@
 #include <string.h>
 #include <lfortran_intrinsics.h>
 
-float _lcompilers_optimization_floordiv_f32(float a, float b);
-double _lcompilers_optimization_floordiv_f64(double a, double b);
-int16_t _lcompilers_optimization_floordiv_i16(int16_t a, int16_t b);
-int32_t _lcompilers_optimization_floordiv_i32(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i321(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i3210(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i322(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i323(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i324(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i325(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i326(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i327(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i328(int32_t a, int32_t b);
-int32_t _lcompilers_optimization_floordiv_i329(int32_t a, int32_t b);
-int64_t _lcompilers_optimization_floordiv_i64(int64_t a, int64_t b);
-int8_t _lcompilers_optimization_floordiv_i8(int8_t a, int8_t b);
-uint16_t _lcompilers_optimization_floordiv_u16(uint16_t a, uint16_t b);
-uint32_t _lcompilers_optimization_floordiv_u32(uint32_t a, uint32_t b);
-uint64_t _lcompilers_optimization_floordiv_u64(uint64_t a, uint64_t b);
-uint8_t _lcompilers_optimization_floordiv_u8(uint8_t a, uint8_t b);
 void test_pow();
 int32_t test_pow_1(int32_t a, int32_t b);
 void main0();
@@ -36,286 +16,6 @@ void __main__global_stmts();
 
 
 // Implementations
-float _lcompilers_optimization_floordiv_f32(float a, float b)
-{
-    double r;
-    float result;
-    int64_t tmp;
-    r = a/b;
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = (float)(tmp);
-    return result;
-}
-
-double _lcompilers_optimization_floordiv_f64(double a, double b)
-{
-    double r;
-    double result;
-    int64_t tmp;
-    r = a/b;
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = (double)(tmp);
-    return result;
-}
-
-int16_t _lcompilers_optimization_floordiv_i16(int16_t a, int16_t b)
-{
-    double r;
-    int16_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i32(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i321(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i3210(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i322(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i323(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i324(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i325(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i326(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i327(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i328(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int32_t _lcompilers_optimization_floordiv_i329(int32_t a, int32_t b)
-{
-    double r;
-    int32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int64_t _lcompilers_optimization_floordiv_i64(int64_t a, int64_t b)
-{
-    double r;
-    int64_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-int8_t _lcompilers_optimization_floordiv_i8(int8_t a, int8_t b)
-{
-    double r;
-    int8_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = tmp;
-    return result;
-}
-
-uint16_t _lcompilers_optimization_floordiv_u16(uint16_t a, uint16_t b)
-{
-    double r;
-    uint16_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = (uint16_t)(tmp);
-    return result;
-}
-
-uint32_t _lcompilers_optimization_floordiv_u32(uint32_t a, uint32_t b)
-{
-    double r;
-    uint32_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = (uint32_t)(tmp);
-    return result;
-}
-
-uint64_t _lcompilers_optimization_floordiv_u64(uint64_t a, uint64_t b)
-{
-    double r;
-    uint64_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = (uint64_t)(tmp);
-    return result;
-}
-
-uint8_t _lcompilers_optimization_floordiv_u8(uint8_t a, uint8_t b)
-{
-    double r;
-    uint8_t result;
-    int64_t tmp;
-    r = (double)(a)/(double)(b);
-    tmp = (int64_t)(r);
-    if (r <   0.00000000000000000e+00 && (double)(tmp) != r) {
-        tmp = tmp - 1;
-    }
-    result = (uint8_t)(tmp);
-    return result;
-}
-
 double __lpython_overloaded_0__pow(int32_t x, int32_t y)
 {
     double _lpython_return_variable;
diff --git a/tests/reference/cpp-expr7-529bd53.json b/tests/reference/cpp-expr7-529bd53.json
index 9697eaa92d3..c1ffa27ca4f 100644
--- a/tests/reference/cpp-expr7-529bd53.json
+++ b/tests/reference/cpp-expr7-529bd53.json
@@ -8,6 +8,6 @@
     "stdout": "cpp-expr7-529bd53.stdout",
     "stdout_hash": "8f72ce4b2d8f170884e171b1bdfa4a4ea07344825b6787d814a446cf",
     "stderr": "cpp-expr7-529bd53.stderr",
-    "stderr_hash": "6e9790ac88db1a9ead8f64a91ba8a6605de67167037908a74b77be0c",
+    "stderr_hash": "14266d9eecb4272a8102f9495568abd799c50f1741a894f56101ddd8",
     "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/cpp-expr7-529bd53.stderr b/tests/reference/cpp-expr7-529bd53.stderr
index a4fad29beb7..3658b5c161b 100644
--- a/tests/reference/cpp-expr7-529bd53.stderr
+++ b/tests/reference/cpp-expr7-529bd53.stderr
@@ -9,3 +9,7 @@ style suggestion: Could have used '**' instead of 'pow'
   |
 8 |     res = i32(pow(a, b))
   |               ^^^^^^^^^ '**' could be used instead
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/cpp-test_builtin_pow-56b3f92.json b/tests/reference/cpp-test_builtin_pow-56b3f92.json
index a18ad0aab97..70edf5661bd 100644
--- a/tests/reference/cpp-test_builtin_pow-56b3f92.json
+++ b/tests/reference/cpp-test_builtin_pow-56b3f92.json
@@ -8,6 +8,6 @@
     "stdout": "cpp-test_builtin_pow-56b3f92.stdout",
     "stdout_hash": "dec0af96e013cd38032672f4812f876e586bf697757278addd17b591",
     "stderr": "cpp-test_builtin_pow-56b3f92.stderr",
-    "stderr_hash": "859ce76c74748f2d32c7eab92cfbba789a78d4cbf5818646b99806ea",
+    "stderr_hash": "c6495babe2f9dc8ec8cdc1e8009ed03c4bca6316839caed43f198e7a",
     "returncode": 0
 }
\ No newline at end of file
diff --git a/tests/reference/cpp-test_builtin_pow-56b3f92.stderr b/tests/reference/cpp-test_builtin_pow-56b3f92.stderr
index 5dbb75ad245..f43034705cc 100644
--- a/tests/reference/cpp-test_builtin_pow-56b3f92.stderr
+++ b/tests/reference/cpp-test_builtin_pow-56b3f92.stderr
@@ -3,3 +3,7 @@ style suggestion: Could have used '**' instead of 'pow'
    |
 11 |     assert i32(pow(a, b)) == 32
    |                ^^^^^^^^^ '**' could be used instead
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/pass_class_constructor-structs_16-5e3508f.json b/tests/reference/pass_class_constructor-structs_16-5e3508f.json
index 62901bd56ce..8204d2a621c 100644
--- a/tests/reference/pass_class_constructor-structs_16-5e3508f.json
+++ b/tests/reference/pass_class_constructor-structs_16-5e3508f.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "pass_class_constructor-structs_16-5e3508f.stdout",
-    "stdout_hash": "74b7cad17c2d6f7774e930e8a24b9bf35ca37425c7a3fa6f4851ef84",
+    "stdout_hash": "b2d0bddf9e8ba1877d428e44cb6bc2a32bb7d2c9db18a20d649dd7cf",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/pass_class_constructor-structs_16-5e3508f.stdout b/tests/reference/pass_class_constructor-structs_16-5e3508f.stdout
index a3b30d3762d..7ab18fc44d0 100644
--- a/tests/reference/pass_class_constructor-structs_16-5e3508f.stdout
+++ b/tests/reference/pass_class_constructor-structs_16-5e3508f.stdout
@@ -233,7 +233,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 bd)
                                         (UnionTypeConstructor
                                             5 A_B
@@ -245,7 +245,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (UnionInstanceMember
                                             (Var 5 bd)
                                             4 x
@@ -255,7 +255,7 @@
                                         (IntegerConstant 1 (Integer 4))
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 5 ad)
                                             5 1_A_b
@@ -267,7 +267,7 @@
                                         (Var 5 bd)
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (StructInstanceMember
                                             (Var 5 ad)
                                             5 1_A_c
diff --git a/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.json b/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.json
index 447a7b2cdfa..4c672f0719c 100644
--- a/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.json
+++ b/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "pass_inline_function_calls-func_inline_01-fba3c47.stdout",
-    "stdout_hash": "1705050e9a2183a2f6aa493125e093e7c4d17a4f2f4949749950e11a",
+    "stdout_hash": "1aa0f1c94c3cb04aa6009f15f823c65cbda2fd3f3a0b52eedd945469",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.stdout b/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.stdout
index 049c262de1a..96ffb8f606f 100644
--- a/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.stdout
+++ b/tests/reference/pass_inline_function_calls-func_inline_01-fba3c47.stdout
@@ -111,7 +111,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 3 _lpython_return_variable)
                                             (Var 3 n)
                                             ()
@@ -119,7 +119,7 @@
                                         (Return)]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 _lpython_return_variable)
                                         (IntegerBinOp
                                             (FunctionCall
@@ -270,7 +270,7 @@
                                     )
                                     [fib]
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 x)
                                         (Cast
                                             (IntegerConstant 40 (Integer 4))
@@ -280,7 +280,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 n_fib)
                                         (Var 4 x)
                                         ()
@@ -298,7 +298,7 @@
                                             (Logical 4)
                                             ()
                                         )
-                                        [(=
+                                        [(Assignment
                                             (Var 4 _lpython_return_variable_fib)
                                             (Var 4 n_fib)
                                             ()
@@ -309,7 +309,7 @@
                                         )]
                                         []
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 _lpython_return_variable_fib)
                                         (IntegerBinOp
                                             (FunctionCall
@@ -364,7 +364,7 @@
                                         1
                                         4 ~empty_block
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 ans)
                                         (Var 4 _lpython_return_variable_fib)
                                         ()
diff --git a/tests/reference/pass_loop_vectorise-vec_01-be9985e.json b/tests/reference/pass_loop_vectorise-vec_01-be9985e.json
index 7295f200486..50e0e90dae5 100644
--- a/tests/reference/pass_loop_vectorise-vec_01-be9985e.json
+++ b/tests/reference/pass_loop_vectorise-vec_01-be9985e.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "pass_loop_vectorise-vec_01-be9985e.stdout",
-    "stdout_hash": "6f16af23ec8a9515bab82fb531b6813f5df3831eceaeaed946112957",
+    "stdout_hash": "fcaa5608fe5f73d0fabcae7c837606ab6b80aafd29d3a108c19f4e1c",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/pass_loop_vectorise-vec_01-be9985e.stdout b/tests/reference/pass_loop_vectorise-vec_01-be9985e.stdout
index 984c118408e..2c26bc65632 100644
--- a/tests/reference/pass_loop_vectorise-vec_01-be9985e.stdout
+++ b/tests/reference/pass_loop_vectorise-vec_01-be9985e.stdout
@@ -271,7 +271,7 @@
                                                     (Var 226 arg3)
                                                     (Var 226 arg4)
                                                     (Var 226 arg5)]
-                                                    [(=
+                                                    [(Assignment
                                                         (Var 226 __1_k)
                                                         (IntegerBinOp
                                                             (Var 226 arg2)
@@ -297,7 +297,7 @@
                                                             (Logical 4)
                                                             ()
                                                         )
-                                                        [(=
+                                                        [(Assignment
                                                             (Var 226 __1_k)
                                                             (IntegerBinOp
                                                                 (Var 226 __1_k)
@@ -308,7 +308,7 @@
                                                             )
                                                             ()
                                                         )
-                                                        (=
+                                                        (Assignment
                                                             (ArrayItem
                                                                 (Var 226 arg0)
                                                                 [(()
@@ -355,9 +355,9 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 220 a)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -365,13 +365,14 @@
                                                 (IntegerConstant 9216 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 220 b)
-                                        (ArrayConstant
+                                        (ArrayConstructor
                                             []
                                             (Array
                                                 (Real 8)
@@ -379,6 +380,7 @@
                                                 (IntegerConstant 9216 (Integer 4)))]
                                                 FixedSizeArray
                                             )
+                                            ()
                                             RowMajor
                                         )
                                         ()
@@ -395,7 +397,7 @@
                                             (IntegerConstant 9215 (Integer 4))
                                         )
                                         (IntegerConstant 1 (Integer 4)))
-                                        [(=
+                                        [(Assignment
                                             (ArrayItem
                                                 (Var 220 b)
                                                 [(()
diff --git a/tests/reference/pass_print_list_tuple-print_02-09600eb.json b/tests/reference/pass_print_list_tuple-print_02-09600eb.json
index 8cff508098d..a256225c9da 100644
--- a/tests/reference/pass_print_list_tuple-print_02-09600eb.json
+++ b/tests/reference/pass_print_list_tuple-print_02-09600eb.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "pass_print_list_tuple-print_02-09600eb.stdout",
-    "stdout_hash": "16568187a4448877082b52b613458830bbad14ec61abbf478bcf4cb7",
+    "stdout_hash": "b518803746ffd1666ff29f4bfa2347eb621d81af5e52dc36964cd249",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/pass_print_list_tuple-print_02-09600eb.stdout b/tests/reference/pass_print_list_tuple-print_02-09600eb.stdout
index 8145eddc4b5..89340fd8929 100644
--- a/tests/reference/pass_print_list_tuple-print_02-09600eb.stdout
+++ b/tests/reference/pass_print_list_tuple-print_02-09600eb.stdout
@@ -499,7 +499,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 a)
                                         (ListConstant
                                             [(StringConstant
@@ -520,7 +520,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 b)
                                         (ListConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -533,7 +533,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 c)
                                         (ListConstant
                                             [(RealConstant
@@ -562,7 +562,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 d)
                                         (ListConstant
                                             []
@@ -2783,7 +2783,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 4 w)
                                         (ListConstant
                                             [(ListConstant
@@ -2872,7 +2872,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 x)
                                         (ListConstant
                                             [(ListConstant
@@ -2959,7 +2959,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 y)
                                         (ListConstant
                                             [(ListConstant
@@ -3010,7 +3010,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 4 z)
                                         (ListConstant
                                             [(ListConstant
@@ -4623,7 +4623,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 6 p)
                                         (ListConstant
                                             [(ListConstant
@@ -4784,7 +4784,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 q)
                                         (ListConstant
                                             [(ListConstant
@@ -5607,7 +5607,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 6 r)
                                         (ListConstant
                                             [(ListConstant
@@ -7468,7 +7468,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 5 a)
                                         (ListConstant
                                             [(TupleConstant
@@ -7504,7 +7504,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 c)
                                         (ListConstant
                                             [(ListConstant
@@ -7578,7 +7578,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b1)
                                         (ListConstant
                                             [(StringConstant
@@ -7607,7 +7607,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b2)
                                         (ListConstant
                                             [(IntegerConstant 10 (Integer 4))
@@ -7620,7 +7620,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 5 b)
                                         (TupleConstant
                                             [(Var 5 b1)
diff --git a/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.json b/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.json
index a8ff500c91e..51e2d47a18b 100644
--- a/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.json
+++ b/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "pass_print_list_tuple-print_list_tuple_03-195fa9c.stdout",
-    "stdout_hash": "7f36160fc04369f1dc328606f82179f31dfcf5e375451708012816ec",
+    "stdout_hash": "080b6913697774b6f98669a991fb0f6d0346e52adc4f2de889d7ffcd",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.stdout b/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.stdout
index 6724a6115e8..1e565734821 100644
--- a/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.stdout
+++ b/tests/reference/pass_print_list_tuple-print_list_tuple_03-195fa9c.stdout
@@ -125,7 +125,7 @@
                                     )
                                     []
                                     []
-                                    [(=
+                                    [(Assignment
                                         (Var 3 x)
                                         (DictConstant
                                             [(IntegerConstant 1 (Integer 4))
@@ -156,7 +156,7 @@
                                         )
                                         ()
                                     )
-                                    (=
+                                    (Assignment
                                         (Var 3 y)
                                         (DictConstant
                                             [(IntegerConstant 1 (Integer 4))
diff --git a/tests/reference/run_dbg-test_quit_01-30889cc.json b/tests/reference/run_dbg-test_quit_01-30889cc.json
index d46739a9521..37ce5d232aa 100644
--- a/tests/reference/run_dbg-test_quit_01-30889cc.json
+++ b/tests/reference/run_dbg-test_quit_01-30889cc.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "run_dbg-test_quit_01-30889cc.stderr",
-    "stderr_hash": "b3dac87462f9f0650e5a6af68791137ca9d29f9a64139ba7718a9f96",
+    "stderr_hash": "56a8b2a9b2ee213cbfab4c18870ed93ddbfaa37e421f171155d06d4f",
     "returncode": 10
 }
\ No newline at end of file
diff --git a/tests/reference/run_dbg-test_quit_01-30889cc.stderr b/tests/reference/run_dbg-test_quit_01-30889cc.stderr
index c1c7a54e601..5fd4fe85c8b 100644
--- a/tests/reference/run_dbg-test_quit_01-30889cc.stderr
+++ b/tests/reference/run_dbg-test_quit_01-30889cc.stderr
@@ -4,4 +4,4 @@
     test()
   File "tests/runtime_errors/test_quit_01.py", line 2
     quit(10)
-STOP
+STOP 10
diff --git a/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.json b/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.json
index d580243c7ba..fde8aee79c1 100644
--- a/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.json
+++ b/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.json
@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "runtime-test_list_item_mixed_print-a3fd49f.stdout",
-    "stdout_hash": "cffcdb43864ef4e234dec5a10923f9077b7c6d1f4d9c37df1882f375",
+    "stdout_hash": "9d9a68fea29f11320efb0764ce38ed3d4090f64457b0f1eb10251a2b",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0
diff --git a/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.stdout b/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.stdout
index 8659fad42da..a3f624820b5 100644
--- a/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.stdout
+++ b/tests/reference/runtime-test_list_item_mixed_print-a3fd49f.stdout
@@ -1,12 +1,12 @@
- Hello
-This is LPython
+Hello
+This isLPython
 1 2 3 ... 3 4 5
 The first element is: 1
 The middle element is: 3
 3.14000000000000012e+00 * 2 = 6.28000000000000025e+00
 Total: 9.41999999999999993e+00
 (1, 2, 3) is a tuple, but 1 is a number.
-1 is smaller than 2 is smaller than 3
+123
 1 # 2 # 3 # 4 # 5 # 
 
 List  0 : [1, 2]
diff --git a/tests/reference/tokens-indent1-0b243c5.json b/tests/reference/tokens-indent1-0b243c5.json
index 8f6a69248b1..7cfa2371c01 100644
--- a/tests/reference/tokens-indent1-0b243c5.json
+++ b/tests/reference/tokens-indent1-0b243c5.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-indent1-0b243c5.stderr",
-    "stderr_hash": "d642cbfab3b7f5cdc1d373d420877c776d64b9eb6dcdd2491f7970f7",
+    "stderr_hash": "4aa1509a66bac651d22be84453a3532bb771094363034cd45970bf75",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-indent1-0b243c5.stderr b/tests/reference/tokens-indent1-0b243c5.stderr
index ce7ce194d9e..5a3c7aac6a5 100644
--- a/tests/reference/tokens-indent1-0b243c5.stderr
+++ b/tests/reference/tokens-indent1-0b243c5.stderr
@@ -3,3 +3,7 @@ tokenizer error: Indentation should be of the same type (either tabs or spaces)
   |
 3 |   pass
   | ^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-indent2-a8438a0.json b/tests/reference/tokens-indent2-a8438a0.json
index 6842962c04f..ae3c3870475 100644
--- a/tests/reference/tokens-indent2-a8438a0.json
+++ b/tests/reference/tokens-indent2-a8438a0.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-indent2-a8438a0.stderr",
-    "stderr_hash": "ab862ff68983c5975d21f13c5b159de2a2888cae1d38a38a24700a88",
+    "stderr_hash": "17e55ff96e413590e93fd83bb06dc065dda4e0ee563c4216349342f7",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-indent2-a8438a0.stderr b/tests/reference/tokens-indent2-a8438a0.stderr
index 75f882f0a8b..4e0ac75a40f 100644
--- a/tests/reference/tokens-indent2-a8438a0.stderr
+++ b/tests/reference/tokens-indent2-a8438a0.stderr
@@ -3,3 +3,7 @@ tokenizer error: Indentation should be of the same type (either tabs or spaces)
   |
 4 |  else:
   | ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-indent3-0eaf3e6.json b/tests/reference/tokens-indent3-0eaf3e6.json
index e1ee281ca3b..efe6052467b 100644
--- a/tests/reference/tokens-indent3-0eaf3e6.json
+++ b/tests/reference/tokens-indent3-0eaf3e6.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-indent3-0eaf3e6.stderr",
-    "stderr_hash": "1eddb6f37641a3eee16900c7025e6420f21cd97d3f877720bc90401b",
+    "stderr_hash": "6a6419de94ff032184aedcbe49c8243becdef462d84e66cabd891467",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-indent3-0eaf3e6.stderr b/tests/reference/tokens-indent3-0eaf3e6.stderr
index d6f7eb62241..d9926ca2b81 100644
--- a/tests/reference/tokens-indent3-0eaf3e6.stderr
+++ b/tests/reference/tokens-indent3-0eaf3e6.stderr
@@ -3,3 +3,7 @@ tokenizer error: Expected an indented block.
   |
 5 |     pass
   | ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-paren1-94fa736.json b/tests/reference/tokens-paren1-94fa736.json
index b939a408f36..9bc01f82d32 100644
--- a/tests/reference/tokens-paren1-94fa736.json
+++ b/tests/reference/tokens-paren1-94fa736.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-paren1-94fa736.stderr",
-    "stderr_hash": "d0af4503aa7935c5215252efbb68900d95a6b897f6ad195850573db0",
+    "stderr_hash": "8596596679a7a8dc30d0716edf502040725d61cb75a8cc420f0cb295",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-paren1-94fa736.stderr b/tests/reference/tokens-paren1-94fa736.stderr
index 9d1d1aee5ad..1be82791587 100644
--- a/tests/reference/tokens-paren1-94fa736.stderr
+++ b/tests/reference/tokens-paren1-94fa736.stderr
@@ -3,3 +3,7 @@ tokenizer error: Too many nested parentheses
   |
 1 | -(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
   |                                                                                                                                                                                                          ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-paren2-0eef339.json b/tests/reference/tokens-paren2-0eef339.json
index 8d1ac74d270..313e04d5ef8 100644
--- a/tests/reference/tokens-paren2-0eef339.json
+++ b/tests/reference/tokens-paren2-0eef339.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-paren2-0eef339.stderr",
-    "stderr_hash": "60430252b0f0f0ab667252a10da601d08dcc962d240fbc7c3fe3fd6c",
+    "stderr_hash": "f17a1fd53733f79a0c99cc3450feb8619f0eec0884dbdd2ed766bb65",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-paren2-0eef339.stderr b/tests/reference/tokens-paren2-0eef339.stderr
index e1fa73a259d..fa08291d16a 100644
--- a/tests/reference/tokens-paren2-0eef339.stderr
+++ b/tests/reference/tokens-paren2-0eef339.stderr
@@ -3,3 +3,7 @@ tokenizer error: Parentheses does not match
   |
 6 | [{]}
   |   ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-paren3-0d47100.json b/tests/reference/tokens-paren3-0d47100.json
index a0fc7a5fe86..0789a089f5f 100644
--- a/tests/reference/tokens-paren3-0d47100.json
+++ b/tests/reference/tokens-paren3-0d47100.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-paren3-0d47100.stderr",
-    "stderr_hash": "5dfebef8a231835dd95c490a961ef3981b73e717a91351ad9d327676",
+    "stderr_hash": "cdf04cdb67804d155e043d9966d42bd9046d70d2cd6aecf9201775ea",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-paren3-0d47100.stderr b/tests/reference/tokens-paren3-0d47100.stderr
index fd5422d82bf..6efa2545756 100644
--- a/tests/reference/tokens-paren3-0d47100.stderr
+++ b/tests/reference/tokens-paren3-0d47100.stderr
@@ -3,3 +3,7 @@ tokenizer error: Parenthesis unexpected
   |
 2 | ] {}}
   | ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-paren4-5c2fc32.json b/tests/reference/tokens-paren4-5c2fc32.json
index 184481775c9..969c12364c2 100644
--- a/tests/reference/tokens-paren4-5c2fc32.json
+++ b/tests/reference/tokens-paren4-5c2fc32.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-paren4-5c2fc32.stderr",
-    "stderr_hash": "4ee038fab6af5c6ed6e0bfc147b98031946c9aa227364e263aaa4913",
+    "stderr_hash": "d1b1369b365f63a4a700a34fce46c2785ff5b52b99f9ab87250e1aef",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-paren4-5c2fc32.stderr b/tests/reference/tokens-paren4-5c2fc32.stderr
index 28331acf020..1d8c03df3bf 100644
--- a/tests/reference/tokens-paren4-5c2fc32.stderr
+++ b/tests/reference/tokens-paren4-5c2fc32.stderr
@@ -3,3 +3,7 @@ tokenizer error: Parentheses was never closed
   |
 6 | 
   | ^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.
diff --git a/tests/reference/tokens-test_literal-e20c024.json b/tests/reference/tokens-test_literal-e20c024.json
index de80ac4c4e1..efa0c9cb68a 100644
--- a/tests/reference/tokens-test_literal-e20c024.json
+++ b/tests/reference/tokens-test_literal-e20c024.json
@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "tokens-test_literal-e20c024.stderr",
-    "stderr_hash": "58fe8b74550bd6f81761b173626f3d45eaae346665862f1b085eebe8",
+    "stderr_hash": "c2e777b21eb08794f3349833d07db3b29df8c62203812cb2af8d2cd5",
     "returncode": 1
 }
\ No newline at end of file
diff --git a/tests/reference/tokens-test_literal-e20c024.stderr b/tests/reference/tokens-test_literal-e20c024.stderr
index 977e7c1fd16..8f8f2d3a9fa 100644
--- a/tests/reference/tokens-test_literal-e20c024.stderr
+++ b/tests/reference/tokens-test_literal-e20c024.stderr
@@ -3,3 +3,7 @@ tokenizer error: Leading zeros in decimal integer are not allowed
   |
 2 |     x: i32 = 0123
   |              ^^^^ 
+
+
+Note: Please report unclear or confusing messages as bugs at
+https://github.com/lcompilers/lpython/issues.