bug#11417: 24.0.96; infinite looping in xdisp.c

[Eli Zaretskii]

> Date: Thu, 10 May 2012 20:43:26 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: cyd@gnu.org, 11417@debbugs.gnu.org
> 
>   emacs -Q -nw
>   C-x C-f xdisp.c RET
>   M-: (let ((ov (make-overlay 4928 4933 nil t t)) (fringe (propertize "!" 
> 'display (list 'left-fringe 'question-mark)))) (overlay-put ov 'before-string 
> fringe)) RET
> 
> (The last one is a single long line to type into the minibuffer.)
> 
> Redisplay only shows part of the screen after that, but Emacs doesn't
> yet infloop.  Move a cursor a bit, and it will.

This happens in Emacs 23.4 as well.  But I don't think we can release
Emacs 24.1 with this infinite loop.