The goal is to fix this failure:

http://buildbot.python.org/all/builders/AMD64%20Windows8.1%20Refleaks%203.x/builds/29/steps/test/logs/stdio

Re-running test 'test_largefile' in verbose mode
(...)
test_lseek (test.test_largefile.CLargeFileTest) ... ok
test_osstat (test.test_largefile.CLargeFileTest) ... ok
test_seek_read (test.test_largefile.CLargeFileTest) ... ok
test_seekable (test.test_largefile.CLargeFileTest) ... ok
test_truncate (test.test_largefile.CLargeFileTest) ... ok
test_lseek (test.test_largefile.PyLargeFileTest) ... Timeout (0:20:00)!
Thread 0x0000032c (most recent call first):
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\_pyio.py", line 1617 in write
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\_pyio.py", line 1220 in _flush_unlocked
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\_pyio.py", line 1213 in flush
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\test_largefile.py", line 37 in setUp
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\case.py", line 601 in run
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\case.py", line 653 in __call__
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\unittest\runner.py", line 176 in run
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\support\__init__.py", line 1896 in _run_suite
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\support\__init__.py", line 1936 in run_unittest
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\runtest.py", line 164 in test_runner
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\refleak.py", line 84 in dash_R
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\runtest.py", line 167 in runtest_inner
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\runtest.py", line 129 in runtest
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\main.py", line 262 in rerun_failed_tests
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\main.py", line 506 in _main
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\main.py", line 480 in main
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\libregrtest\main.py", line 544 in main
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\test\__main__.py", line 2 in <module>
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\runpy.py", line 85 in _run_code
  File "D:\buildarea\3.x.ware-win81-release.refleak\build\lib\runpy.py", line 193 in _run_module_as_main