The pthread_barrier_init manpage specifies that count must be > 0.
indeed, pthread_barrier_init() is returning EINVAL, and swrast_dri is
ignoring this return value. So this is a latent bug in mesa.
** Also affects: mesa (Ubuntu)
Importance: Undecided
Status: New
** Changed in: mesa (Ubuntu Xenial)
Status: New => Triaged
** Changed in: mesa (Ubuntu Xenial)
Importance: Undecided => Critical
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which is subscribed to mesa in Ubuntu.
https://bugs.launchpad.net/bugs/1559842
Title:
SIGFPE in pthread_barrier_destroy in glibc 2.23
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