bug#36280: 26.2.90; 'emacs -Q' receives SIGSEGV, Segmentation fault

[Eli Zaretskii]

> From: VanL <van@scratch.space>
> Date: Thu, 20 Jun 2019 23:07:05 +1000
> Cc: 36280@debbugs.gnu.org
> 
>   Thread 1 received signal SIGSEGV, Segmentation fault.
>   0x00007fff91c9645c in pthread_mutex_lock ()
>      from /usr/lib/system/libsystem_pthread.dylib
>   (gdb) quit

Instead of "quit" say "thread apply all bt", and show the results.

Thanks.