https://bugs.python.org/issue31687 test_semaphore_tracker() of test_multiprocessing_spawn fails randomly (race condition?)

====================================================================== FAIL: test_semaphore_tracker (test.test_multiprocessing_forkserver.TestSemaphoreTracker)

Traceback (most recent call last): File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/_test_multiprocessing.py", line 4380, in test_semaphore_tracker _multiprocessing.sem_unlink(name2) AssertionError: OSError not raised

====================================================================== FAIL: test_forkserver_sigkill (test.test_multiprocessing_forkserver.WithProcessesTestProcess)

Traceback (most recent call last): File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/_test_multiprocessing.py", line 653, in test_forkserver_sigkill self.check_forkserver_death(signal.SIGKILL) File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/_test_multiprocessing.py", line 643, in check_forkserver_death self.assertTrue(evt.is_set()) AssertionError: False is not true

2017-12-01 0:32 GMT+01:00 <buildbot@python.org>:

The Buildbot has detected a failed build on builder x86 Tiger 3.x while building python/cpython. Full details are available at: http://buildbot.python.org/all/#builders/30/builds/260

Buildbot URL: http://buildbot.python.org/all/

Worker for this Build: bolen-tiger

Build Reason: <unknown> Blamelist: Serhiy Storchaka <storchaka@gmail.com>, Victor Stinner <victor.stinner@gmail.com>

BUILD FAILED: failed test (failure)

Sincerely, -The Buildbot

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