[issue6721] Locks in python standard library should be sanitized on fork

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

I encountered this issue while debugging some multiprocessing code; fork() would be called from one thread while sys.stdout was in use in another thread (simply because of a couple of debugging statements). As a result the IO lock would be already "taken" in the child process and any operation on sys.stdout would deadlock.

This is definitely something that can happen more easily than I thought.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6721>
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