New submission from Evgeny Kapun:

When called with a file descriptor as an argument, os.listdir() duplicates it 
to pass to fdopendir(3). If this call fails, the new file descriptor is not 
closed, which leads to file descriptor leak.

----------
components: Library (Lib)
messages: 188322
nosy: abacabadabacaba
priority: normal
severity: normal
status: open
title: os.listdir() leaks FDs if invoked on FD pointing to a non-directory
type: resource usage
versions: Python 3.3, Python 3.4

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17899>
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