[issue30931] Race condition in asyncore wrongly closes channel

[Jaume]

Changes by Jaume <jaumemarhuenda at gmail.com>:


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type:  -> resource usage
versions: +Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30931>
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