From 2a6f5b38acfc0ee59ea265d17b31caaa4de1c266 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Thu, 27 Dec 2001 16:27:28 +0000
Subject: _reduce(): Avoid infinite recursion in the pickler when
 self.__class__ doesn't have the _HEAPTYPE flag set, e.g. for time.struct_time
 and posix.stat_result.

This fixes the immediate symptoms of SF bug #496873 (cPickle /
time.struct_time loop), replacing the infinite loop with an exception.
---
 Lib/copy_reg.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/copy_reg.py b/Lib/copy_reg.py
index 92cbd53..8a3550a 100644
--- a/Lib/copy_reg.py
+++ b/Lib/copy_reg.py
@@ -53,6 +53,8 @@ def _reduce(self):
     if base is object:
         state = None
     else:
+        if base is self.__class__:
+            raise TypeError, "can't pickle %s objects" % base.__name__
         state = base(self)
     args = (self.__class__, base, state)
     try:
-- 
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