commit 5bb893c44b9fd8304b91a5033e10cc868af8fba1
author Serhiy Storchaka <storchaka@gmail.com> Sat Jan 26 11:52:06 2013 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Sat Jan 26 11:52:06 2013 +0200
tree f0ab53cd19be60f5953a6eb78221339497724431
parent ace3ad3bf79a8a3b0ea9d1de97c8f8b59d1ac7b2

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 66e307d..dfa371e 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -932,10 +932,8 @@
 
     # Issue 13454: Crash when deleting backward iterator from tee()
     def test_tee_del_backward(self):
-        forward, backward = tee(range(20000000))
-        for i in forward:
-            pass
-
+        forward, backward = tee(repeat(None, 20000000))
+        any(forward)  # exhaust the iterator
         del backward
 
     def test_StopIteration(self):