On 8 October 2016 at 06:53, Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Reuben Thomas <rrt@sc3d.org>
> > Date: Sat, 8 Oct 2016 00:12:26 +0100
> >
> > In both cases, the crash occurs while Emacs is lazy-loading my desktop.
>
> What does "lazy-loading" mean in this context?
>
> > I can't tell exactly what it's doing, but it appears to be about the
> > same place each time.
>
> If you run Emacs under GDB, and source the src/.gdbinit file provided
> in the source tree, the backtrace command will automatically try to
> produce a Lisp-level backtrace as well.  That could be helpful.
>
> This string in the 1st backtrace you show could help figure out what
> form was being evaluated:
>
>   #41 0x000000000059af2d in read_process_output (coding=0x53b3920,
> nbytes=652, chars=0x7fff0376eaa0
>   "Unescaped left brace in regex is deprecated, passed through in regex;
> marked by <-- HERE in m/\\\\begin{
>   <-- HERE tex}(.*?)\\\\end{tex}/ at /usr/bin/texify line 521.\nUnescaped
> left brace in regex is depre"..., p=0x287)
>   at process.c:5440
>
> The SIGSEGV happens here:
>
>       nextsym:
>         if (ptr->gcmarkbit)  <<<<<<<<<<<<<<<<<<
>           break;
>
> So the value of 'ptr' there (frame 20 in the 1st backtrace) is of
> interest.
>

​The current backtrace seems to have crashed at a different point, and
doesn't even include this line, but this time I've kept the gdb session
running in case I can tell you anything else of ​

​interest.​