[issue33532] test_multiprocessing_forkserver: TestIgnoreEINTR.test_ignore() fails on Travis CI

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

I added more traces to PR 7261 and the bug still occurred on Travis CI.

https://travis-ci.org/python/cpython/jobs/385990848

0:05:04 load avg: 42.62 [342/415/1] test_multiprocessing_forkserver failed -- running: test_concurrent_futures (69 sec)
child: pid=19401 ppid=19348
child: send BIG
child: done
test_answer_challenge_auth_failure (test.test_multiprocessing_forkserver.OtherTest) ... ok
test_deliver_challenge_auth_failure (test.test_multiprocessing_forkserver.OtherTest) ... ok
test_closefd (test.test_multiprocessing_forkserver.TestCloseFds) ... ok
test_flags (test.test_multiprocessing_forkserver.TestFlags) ... ok
test_lock (test.test_multiprocessing_forkserver.TestForkAwareThreadLock) ... ok
test_ignore (test.test_multiprocessing_forkserver.TestIgnoreEINTR) ... parent: pid=19342
parent: second SIGUSR1
ERROR

Hum... maybe the child exited, before the parent sent SIGUSR1: the child didn't block on sending 1 MB?

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<https://bugs.python.org/issue33532>
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