commit 6fef14d7f399b9089a14d4ff64047f2fbd7034f3
author Serhiy Storchaka <storchaka@gmail.com> Sat Jan 26 11:51:42 2013 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Sat Jan 26 11:51:42 2013 +0200
tree db3d9341d06fbf170b04734182de8de20da63d35
parent 01b3a08f5ee6f1ffa4ab52e2e9ecd43e0b56bdd9

Optimize the test for issue #13454.
Now it requires almost 4x less memory and is almost 2x faster.

Lib/test/test_itertools.py

diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
index 6f933c5..db9f437 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -908,10 +908,8 @@
 
     # Issue 13454: Crash when deleting backward iterator from tee()
     def test_tee_del_backward(self):
-        forward, backward = tee(xrange(20000000))
-        for i in forward:
-            pass
-
+        forward, backward = tee(repeat(None, 20000000))
+        any(forward)  # exhaust the iterator
         del backward
 
     def test_StopIteration(self):