--- Downloads/Python-2.4.3/Lib/test/pickletester.py	2009-05-01 19:33:24.000000000 -0700
+++ pickletester.py	2009-05-01 19:33:18.000000000 -0700
@@ -825,6 +825,18 @@
             y = self.loads(s)
             self.assertEqual(y._proto, None)
 
+    def test_attribute_name_interning(self):
+        for proto in 0, 1, 2:
+            x = MyInt(1)
+            x.foo = 42
+            x.bar = "hello"
+            s = self.dumps(x, proto)
+            y = self.loads(s)
+            x_keys = sorted(x.__dict__.keys())
+            y_keys = sorted(y.__dict__.keys())
+            for x_key, y_key in zip(x_keys, y_keys):
+                self.assertEqual(id(x_key), id(y_key))
+
 # Test classes for reduce_ex
 
 class REX_one(object):