[issue18763] subprocess: file descriptors should be closed after preexec_fn is called

[Gregory P. Smith]

Gregory P. Smith added the comment:

Thanks!  Backported to subprocess32 in https://code.google.com/p/python-subprocess32/source/detail?r=4ba30d9c64296ea0d2959790ab22d0f1a2678064

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18763>
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