bug#18815: 25.0.50; emacs crash

[Eli Zaretskii]

> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 18815@debbugs.gnu.org
> 
> > From: Yagnesh Raghava Yakkala <hi@yagnesh.org>
> > Date: Fri, 24 Oct 2014 20:41:20 +0900
> > 
> > I see frequent crashes with latest emacs. gdb backtrace is attached.
> 
> Thanks, but I need a reproducible test case to debug this.
> 
> It seems to abort while displaying the mode line, so perhaps you have
> some special setup of the mode line which triggers the bug.

Actually, I've just spotted and fixed a thinko in bidi.c, so please
try the latest trunk.  If the problem still persists, please tell what
is your mode-line-format at the moment of the assertion violation.

Thanks.