[Bug 52213] Thread crashes because pthread_exit is called in a signal handler

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52213

--- Comment #10 from Giovanni Mascellani  ---
I tried to reproduce the same crash in a pure C program (without all the Wine
instrumentation) and it doesn't happen: the program creates a thread, installs
an alternate signal stack, waits on a variable condition, is killed with
SIGQUIT and calls pthread_exit, and all of this seems to work properly. So it
seems that there is something Wine-specific leading to the crash.