[issue38182] test_asyncio.test_subprocess: test_stdin_stdout() failed on AMD64 FreeBSD 10-STABLE Non-Debug 3.x

[STINNER Victor]

New submission from STINNER Victor <vstinner at python.org>:

AMD64 FreeBSD 10-STABLE Non-Debug 3.x:
https://buildbot.python.org/all/#/builders/167/builds/1535

======================================================================
ERROR: test_stdin_stdout (test.test_asyncio.test_subprocess.SubprocessMultiLoopWatcherTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/test_asyncio/test_subprocess.py", line 129, in test_stdin_stdout
    exitcode, stdout = self.loop.run_until_complete(task)
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/asyncio/base_events.py", line 608, in run_until_complete
    return future.result()
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/asyncio/tasks.py", line 490, in wait_for
    raise exceptions.TimeoutError()
asyncio.exceptions.TimeoutError

and then when asyncio is re-run in verbose mode:

ERROR: test_stdin_stdout (test.test_asyncio.test_subprocess.SubprocessMultiLoopWatcherTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/test_asyncio/test_subprocess.py", line 129, in test_stdin_stdout
    exitcode, stdout = self.loop.run_until_complete(task)
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/asyncio/base_events.py", line 608, in run_until_complete
    return future.result()
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/asyncio/tasks.py", line 490, in wait_for
    raise exceptions.TimeoutError()
asyncio.exceptions.TimeoutError

----------
components: Tests, asyncio
messages: 352521
nosy: asvetlov, vstinner, yselivanov
priority: normal
severity: normal
status: open
title: test_asyncio.test_subprocess: test_stdin_stdout() failed on AMD64 FreeBSD 10-STABLE Non-Debug 3.x
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38182>
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