[issue30624] selectors should use bare except clauses

[Giampaolo Rodola']

New submission from Giampaolo Rodola':

Right now it uses "except Exception: ...; raise" which does not take KeyboardInterrupt and SystemExit into account, leaving the fd in a bad state (it's not unregister()ed).

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components: asyncio
messages: 295648
nosy: berker.peksag, giampaolo.rodola, gvanrossum, haypo, neologix, serhiy.storchaka, yselivanov
priority: normal
severity: normal
status: open
title: selectors should use bare except clauses
versions: 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/issue30624>
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