New submission from Kjell Braden <[email protected]>:
on Windows 10 with Python 3.8.2 and Python 3.9.0a4, the ProactorEventLoop
raises "OSError: [WinError 87] The parameter is incorrect" when recvfrom on an
AF_INET6 socket returns data:
DEBUG:asyncio:Using proactor: IocpProactor
INFO:asyncio:Datagram endpoint local_addr=('::', 11111) remote_addr=None
created: (<_ProactorDatagramTransport fd=288>, <__main__.Prot object at
0x0000028739A09580>)
ERROR:root:error_received
Traceback (most recent call last):
File "...\Python\Python39\lib\asyncio\proactor_events.py", line 548, in
_loop_reading
res = fut.result()
File "...\Python\Python39\lib\asyncio\windows_events.py", line 808, in _poll
value = callback(transferred, key, ov)
File "...\Python\Python39\lib\asyncio\windows_events.py", line 496, in
finish_recv
return ov.getresult()
OSError: [WinError 87] The parameter is incorrect
The same code works without issues on python 3.7 or when using
WindowsSelectorEventLoopPolicy.
----------
components: asyncio
files: udp_ipv6_server.py
messages: 364794
nosy: asvetlov, kbr, yselivanov
priority: normal
severity: normal
status: open
title: ProactorEventLoop fails on recvfrom with IPv6 sockets
type: behavior
versions: Python 3.8, Python 3.9
Added file: https://bugs.python.org/file48995/udp_ipv6_server.py
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<https://bugs.python.org/issue40040>
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