bug#31180: 25.3; latex and 6x13 font

[Eli Zaretskii]

> From: Bruno Deremble <bruno.deremble@ens.fr>
> Date: Mon, 16 Apr 2018 14:48:43 +0200
> 
> I am experiencing issues with emacs (25.3.1) and latex files.
> 
> If I set my font to
> (set-default-font "6x13")
> 
> any file .tex that contains a math subscript (e.g.: $b_d$) will crash
> emacs.

Can you try RC1 of Emacs 26.1?  It's available from alpha.gnu.org.

If Emacs 26.1 crashes as well, please show the C level backtrace from
the crash: run Emacs under GDB and when it crashes, type this command
at GDB prompt:

  (gdb) thread apply all bt

Also, does it happen if you evaluate the above in "emacs -Q" and then
visit a TeX file with subscripts?