Test premature segfaulting.

test/usecases/global/test_without_instance.py

@@ -0,0 +1,28 @@
+from neuron import h, gui
+
+
+def make_accessors(mech_name):
+    get = getattr(h, f"get_gbl_{mech_name}")
+    set = getattr(h, f"set_gbl_{mech_name}")
+
+    return get, set
+
+
+def check_write_read_cycle(mech_name):
+    get, set = make_accessors(mech_name)
+
+    expected = 278.045
+    set(expected)
+
+    actual = get()
+    assert (
+        actual == expected
+    ), f"{actual = }, {expected = }, delta = {actual - expected}"
+
+
+def test_top_local():
+    check_write_read_cycle("top_local")
+
+
+if __name__ == "__main__":
+    test_top_local()

test/usecases/global/top_local.mod

@@ -23,3 +23,11 @@ BREAKPOINT {
     y = gbl
     il = 0.0000001 * (v - 10.0)
 }
+
+FUNCTION get_gbl() {
+    get_gbl = gbl
+}
+
+PROCEDURE set_gbl(value) {
+    gbl = value
+}