bug#23869: 25.0.95; replace-match can crash emacs

[Eli Zaretskii]

> From:  Leo Liu <sdl.web@gmail.com>
> Cc: 23869@debbugs.gnu.org
> Date: Thu, 30 Jun 2016 00:00:56 +0800
> 
> > Do you still have this crashed session in a debugger?  Because some of
> > the values involved in this crash are not clear or not shown.
> 
> Yes.

You can kill it now.

> 1. Save the attached bug.el and bug.m to disk
> 2. start emacs like this:
>    emacs -q -l ./bug.el ./bug.m
> 3. Make sure we are in the bug.m buffer and eval
>    (unexport-defun "is_odd/1")
> 
> Emacs should crash.

Thanks, reproduced.  I will take a look if no one beats me to it.