bug#27761: Crash while using proof-general/company-coq on OS X

[Eli Zaretskii]

> From: Денис Редозубов <denis.redozubov@gmail.com>
> Date: Wed, 2 Aug 2017 01:48:36 +0300
> Cc: Eli Zaretskii <eliz@gnu.org>, 27761@debbugs.gnu.org, 
>       "Charles A. Roelli" <charles@aurox.ch>
> 
> (gdb) tb
> Temporary breakpoint 1 at 0x1000377c5: file xdisp.c, line 6922.

No, that's not a good idea, IMO: this place will hit the breakpoint
all the time.  xdisp.c:6922 is in the call-stack because that's where
get_next_display_element calls another function, which caused stack
overflow due to what seems to be infinite recursion.

> > Also, does it also happen with Emacs master?
> 
> I haven't tried it yet, it's emacs-25 branch. Should I switch to master?

Not yet, let's first see what's causing this with the session you
already have captured in the debugger.

Thanks!