[issue38402] crypt: check error from library call

[Benjamin Peterson]

New submission from Benjamin Peterson <benjamin at python.org>:

(split off from #36161)

The crypt module currently doesn't check for errors from crypt or crypt_r. It should.

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messages: 354166
nosy: benjamin.peterson
priority: normal
severity: normal
status: open
title: crypt: check error from library call
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38402>
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