[3.6] bpo-33329: Fix multiprocessing regression on newer glibcs (GH-6575) #6582
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…onGH-6575) Starting with glibc 2.27.9000-xxx, sigaddset() can return EINVAL for some reserved signal numbers between 1 and NSIG. The `range(1, NSIG)` idiom is commonly used to select all signals for blocking with `pthread_sigmask`. So we ignore the sigaddset() return value until we expose sigfillset() to provide a better idiom. (cherry picked from commit 25038ec)
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Starting with glibc 2.27.9000-xxx, sigaddset() can return EINVAL for some
reserved signal numbers between 1 and NSIG. The
range(1, NSIG)idiomis commonly used to select all signals for blocking with
pthread_sigmask.So we ignore the sigaddset() return value until we expose sigfillset()
to provide a better idiom.
(cherry picked from commit 25038ec)
https://bugs.python.org/issue33329