Merged revisions 72930 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r72930 | collin.winter | 2009-05-25 21:12:39 -0700 (Mon, 25 May 2009) | 1 line

  Issue 5794: fix cPickle's unpickling of recursive tuples.
........
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index 1585586..58ce3b5 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -432,6 +432,16 @@
             self.assertEqual(len(x), 1)
             self.assert_(x is x[0])
 
+    def test_recursive_tuple(self):
+        t = ([],)
+        t[0].append(t)
+        for proto in protocols:
+            s = self.dumps(t, proto)
+            x = self.loads(s)
+            self.assertEqual(len(x), 1)
+            self.assertEqual(len(x[0]), 1)
+            self.assert_(x is x[0][0])
+
     def test_recursive_dict(self):
         d = {}
         d[1] = d