From 526286725d3fae0d9ebea9b32308e07b701afec6 Mon Sep 17 00:00:00 2001
From: Fred Drake <fdrake@acm.org>
Date: Mon, 5 Nov 2001 17:41:48 +0000
Subject: [PATCH] Add regression test for SF bug #476616 -- make sure copy of a
 derived class does not share data with the original.

---
 Lib/test/test_userdict.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Lib/test/test_userdict.py b/Lib/test/test_userdict.py
index 49be8c65b9d..0f2fbb8f8e4 100644
--- a/Lib/test/test_userdict.py
+++ b/Lib/test/test_userdict.py
@@ -75,6 +75,10 @@ m2 = MyUserDict(u2)
 m2a = m2.copy()
 verify(m2a == m2)
 
+# SF bug #476616 -- copy() of UserDict subclass shared data
+m2['foo'] = 'bar'
+verify(m2a != m2)
+
 # Test keys, items, values
 
 verify(u2.keys() == d2.keys())