Bernt Røskar Brenna added the comment: Here's an improved repro script.
I believe it demonstrates that it is the combination of subprocess.Popen and threading that causes the problem. Here's the output from my Windows XP VM: *** c:\...> c:\Python33\python.exe repro_improved.py Windows-XP-5.1.2600-SP3 Concurrency: 2 Task kind: subprocess_redirfile 3 errors of 10 Concurrency: 1 Task kind: subprocess_redirfile 0 errors of 10 Concurrency: 2 Task kind: subprocess_devnull 5 errors of 10 Concurrency: 1 Task kind: subprocess_devnull 0 errors of 10 Concurrency: 2 Task kind: nosubprocess 0 errors of 10 Concurrency: 1 Task kind: nosubprocess 0 errors of 10 *** Note that: - even when subprocess redirects to DEVNULL there are errors - when no subprocess.Popen is executed, no errors occur (the file is created as normal, but is not used by subprocess.Popen) ---------- Added file: http://bugs.python.org/file32604/repro_improved.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue19575> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com