[issue30703] test_multiprocessing_forkserver hangs on the master branch

[Antoine Pitrou]

Changes by Antoine Pitrou <pitrou at free.fr>:


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dependencies: +Make CHECK_STATUS_PTHREAD signal-safe, PyThread_acquire_lock can block even when asked not ot

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30703>
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