called. The test checks that SIG_UNBLOCK calls immediatly the signal handler of
the pending SIGUSR1. Improve also the tests using an exception (division by
zero) instead of a flag (a function attribute).

Disable faulthandler timeout thread on Mac OS X: it interacts with
pthread_sigmask() tests.

Patch by Victor Stinner.

to get around a mmap bug with sparse files. Patch written by Steffen Daode
Nurpmeso.

to get around a mmap bug with sparse files. Patch written by Steffen Daode
Nurpmeso.

mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.

descriptor, the check of the object type doesn't read the __class__ attribute
anymore.  Fix a crash if a class override its __class__ attribute (e.g. a proxy
of the str type).

descriptor, the check of the object type doesn't read the __class__ attribute
anymore.  Fix a crash if a class override its __class__ attribute (e.g. a proxy
of the str type).