[issue38912] test_asyncio altered the execution environment

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Another error?

aarch64 RHEL8 LTO + PGO 3.x:
https://buildbot.python.org/all/#/builders/618/builds/835

1 test altered the execution environment:
    test_asyncio

0:01:55 load avg: 7.00 [329/423/1] test_asyncio failed (env changed) (1 min 25 sec) -- running: test_peg_generator (1 min)
Warning -- Unraisable exception
Exception ignored in: <function _SSLProtocolTransport.__del__ at 0xffffbd0d68b0>
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/sslproto.py", line 321, in __del__
    self.close()
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/sslproto.py", line 316, in close
    self._ssl_protocol._start_shutdown()
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/sslproto.py", line 590, in _start_shutdown
    self._abort()
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/sslproto.py", line 731, in _abort
    self._transport.abort()
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/selector_events.py", line 678, in abort
    self._force_close(None)
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/selector_events.py", line 729, in _force_close
    self._loop.call_soon(self._call_connection_lost, exc)
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/base_events.py", line 746, in call_soon
    self._check_closed()
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/asyncio/base_events.py", line 510, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed
(...)

The error occurred in _SSLProtocolTransport.__del__() on self.close(). The previous line is:

_warn(f"unclosed transport {self!r}", ResourceWarning, source=self)

But I cannot see the warning in tests. Maybe the bug occurred in a test which hides logs.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38912>
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