I tried test_tar_pipe_open_read_error_v2.py on py3k,
I saw 3 uncollectable objects are reported. But they
are *collected* by gc.collect() without
gc.set_debug(gc.DEBUG_LEAK). (I'm not familiar to gc,
so maybe this is normal)

I didn't see uncollectable objects in release27-maint
and release31-maint.

And I replaced py3k's Lib/unittest with release31-maint's
one, the error was gone. Maybe problem is in Lib/unittest.
Actually, if I run the code in test_null_tarfile without
unittest, everything runs fine.

E:\python-dev>py3k test_tar_pipe_open_read_error_v2.py
.
----------------------------------------------------------------------
Ran 1 test in 0.050s

OK
===========================
gc: collectable <cell 00C4F968>
gc: collectable <tuple 00BF1968>
gc: collectable <function 00C53C98>
gc: collectable <tuple 00BF5C78>
gc: collectable <function 00C53CF8>
gc: collectable <tuple 00BF99A0>
gc: collectable <function 00C53D58>
gc: collectable <tuple 00C2D8C0>
gc: collectable <function 00C53DB8>
gc: collectable <tuple 00C37348>
gc: collectable <function 00C53E18>
gc: collectable <tuple 00C37460>
gc: collectable <function 00C53E78>
gc: collectable <tuple 00C37540>
gc: collectable <function 00C53ED8>
gc: collectable <function 00C53F38>
gc: collectable <type 00C73CE0>
gc: collectable <dict 00C4DD58>
gc: collectable <getset_descriptor 00C52AB8>
gc: collectable <getset_descriptor 00C52AF8>
gc: collectable <tuple 00AF7778>
gc: collectable <frame 00C28D70>
gc: collectable <method 00AE6278>
gc: collectable <frame 00C299A8>
gc: collectable <tuple 00BD4498>
gc: collectable <frame 00C29B50>
gc: collectable <frame 00C29CF8>
gc: collectable <frame 00C753A0>
gc: collectable <frame 00C75F40>
gc: collectable <tuple 00C375E8>
gc: collectable <frame 00C760E8>
gc: collectable <method 00C52B38>
gc: collectable <frame 00C766C8>
gc: collectable <_io.FileIO 00C52D38>
gc: collectable <_io.BufferedWriter 00BF0758>
gc: collectable <frame 00C78F80>
gc: collectable <tuple 00AEB9F8>
gc: collectable <_AssertRaisesContext 00C4FAF0>
gc: collectable <dict 00C554D0>
gc: collectable <frame 00C79328>
gc: collectable <TarFile 00C4FB98>
gc: collectable <frame 00C89390>
gc: collectable <dict 00C55770>
gc: collectable <list 00AEF978>
gc: collectable <frame 00C89780>
gc: collectable <frame 00C8A040>
gc: collectable <frame 00C89CC0>
gc: collectable <frame 00C89E70>
gc: collectable <traceback 00C56038>
gc: collectable <tuple 00C4F850>
gc: collectable <IOError 00C508F8>
gc: collectable <tuple 00C4FC08>
gc: collectable <ReadError 00C4CC50>
gc: collectable <method 00AE6338>
gc: collectable <tuple 00BF5150>
gc: collectable <tuple_iterator 00C4FA80>
gc: collectable <map 00C4FAB8>
gc: collectable <list 00AFAD38>
gc: uncollectable <_Stream 00C4FB28>
gc: uncollectable <dict 00C55620>
gc: uncollectable <_LowLevelFile 00C4FB60>
===========================
Traceback (most recent call last):
  File "test_tar_pipe_open_read_error_v2.py", line 25, in test_main
    unittest.main()
  File "e:\python-dev\py3k\lib\unittest\main.py", line 95, in __init__
    self.runTests()
  File "e:\python-dev\py3k\lib\unittest\main.py", line 231, in runTests
    sys.exit(not self.result.wasSuccessful())
SystemExit: False

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "test_tar_pipe_open_read_error_v2.py", line 33, in <module>
    test_main()
  File "test_tar_pipe_open_read_error_v2.py", line 30, in test_main
    shutil.rmtree(TEMPDIR)
  File "e:\python-dev\py3k\lib\shutil.py", line 283, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
  File "e:\python-dev\py3k\lib\shutil.py", line 281, in rmtree
    os.remove(fullname)
WindowsError: [Error 32] プロセスはファイルにアクセスできません。別のプロセスが
使用中です。: 'c:\\docume~1\\ocean\\locals~1\\temp\\__foobarbaz__\\tmp.tar'
gc: 61 uncollectable objects at shutdown:
[54634 refs]