bug#14986: Latest Emacs trunk crashes when changing Ispell dictionary

[Eli Zaretskii <eliz@gnu.org>]

> From: "Sebastien Vauban" <sva-news@mygooglest.com>
> Date: Tue, 30 Jul 2013 17:00:13 +0200
> 
> When using the following code on any buffer (email, document, etc.):
> 
> --8<---------------cut here---------------start------------->8---
>   (defun my/flyspell-toggle-dictionary ()
>     "Change the dictionary."
>     (interactive)
>     (let ((dict (or ispell-local-dictionary
>                     ispell-dictionary)))
>       (setq dict (if (string= dict "francais") "american" "francais"))
>       (message "Switched to %S" dict)
>       (sit-for 0.5)
>       (ispell-change-dictionary dict)
>       (when flyspell-mode
>         (flyspell-buffer))))
> --8<---------------cut here---------------end--------------->8---
> 
> I've had multiple crashes (3 or 4, over 2 days) with the latest Emacs trunk.
> 
> The crash happens at the exact time of calling the above code (through a key
> binding).

Any chance of getting a backtrace from GDB?