[issue39148] DatagramProtocol + IPv6 does not work with ProactorEventLoop

[Nathaniel Smith]

Change by Nathaniel Smith <njs at pobox.com>:


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pull_requests: +19469
pull_request: https://github.com/python/cpython/pull/20170

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39148>
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