It seems this change is causing some (intermittent?) buildbot failures in 2.7:

http://buildbot.python.org/all/builders/s390x%20RHEL%202.7/builds/273/steps/test/logs/stdio

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FAIL: test_saveall (test.test_gc.GCTests)
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Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/2.7.edelsohn-rhel-z/build/Lib/test/test_gc.py", line 199, in test_saveall
    self.assertEqual(gc.garbage, [])
AssertionError: Lists differ: [<fileinput.FileInput instance... != []

First list contains 28 additional elements.
First extra element 0:
<fileinput.FileInput instance at 0x3fff6821a68>

Diff is 1461 characters long. Set self.maxDiff to None to see it.

======================================================================
FAIL: test_create_read (test.test_csv.TestLeaks)
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Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/2.7.edelsohn-rhel-z/build/Lib/test/test_csv.py", line 1103, in test_create_read
    self.assertEqual(gc.garbage, [])
AssertionError: Lists differ: [<fileinput.FileInput instance... != []

First list contains 28 additional elements.
First extra element 0:
<fileinput.FileInput instance at 0x3fff6821a68>

Diff is 1461 characters long. Set self.maxDiff to None to see it.