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-rw-r--r--Lib/copy_reg.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/copy_reg.py b/Lib/copy_reg.py
index 2bff142..8099403 100644
--- a/Lib/copy_reg.py
+++ b/Lib/copy_reg.py
@@ -81,6 +81,8 @@ def _reduce(self):
extension_registry = {} # key -> code
inverted_registry = {} # code -> key
extension_cache = {} # code -> object
+# Don't ever rebind those names: cPickle grabs a reference to them when
+# it's initialized, and won't see a rebinding.
def add_extension(module, name, code):
"""Register an extension code."""