bug#26531: Emacs crashes with adding space character

[Eli Zaretskii]

> Date: Sat, 15 Apr 2017 22:18:56 -0500
> From: Ranjan Maitra <maitra@gmx.com>
> 
> I am running emacs 25.1 on a fully updated Fedora 25 linux.
> 
> I have stumbled upon the bug when editing the attached file and I can not 
> figure out the issues.
> 
> In the above file, if I go to before "Usage..." and start typing anything, 
> including whitespace, emacs crashes. Here is gdb output with bt full and 
> backtrace.

Not reproducible here.

Could this be bug#24358 again?  When was your Emacs built?  (You
didn't use "M-x report-emacs-bug", so this information is absent from
your report.)