[issue28708] Low FD_SETSIZE limit on Windows

[Eryk Sun]

Change by Eryk Sun <eryksun at gmail.com>:


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components: +Extension Modules -Build
versions: +Python 3.10 -Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue28708>
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