From 4108a5021eb1425a46349fc283a2c4d54c50130f Mon Sep 17 00:00:00 2001
From: Jeffrey Wilges <jeffrey@wilges.com>
Date: Fri, 3 Apr 2020 17:22:12 -0700
Subject: [PATCH] Patch the Python 3.6 copy module to support re

---
 drover/_copy_patch.py | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 drover/_copy_patch.py

diff --git a/drover/_copy_patch.py b/drover/_copy_patch.py
new file mode 100644
index 0000000..78100ac
--- /dev/null
+++ b/drover/_copy_patch.py
@@ -0,0 +1,8 @@
+"""Conditional patches for Python's `copy` module"""
+import copy
+import re
+import sys
+
+if sys.version_info < (3, 7):
+    # See: <https://stackoverflow.com/questions/6279305/typeerror-cannot-deepcopy-this-pattern-object>
+    copy._deepcopy_dispatch[type(re.compile(''))] = lambda r, _: r # pylint: disable=protected-access