bug#16051: 24.3.50; Emacs hang - resize frame manually

[Eli Zaretskii]

> Date: Thu, 05 Dec 2013 20:21:42 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 16051@debbugs.gnu.org
> 
> > Date: Thu, 05 Dec 2013 18:59:33 +0100
> > From: martin rudalics <rudalics@gmx.at>
> > CC: drew.adams@oracle.com, 16051@debbugs.gnu.org
> > 
> > > Did you drag the mouse far enough to the left?
> > 
> > How could I?  It stops as expected when a minimum width
> > is encountered.
> 
> Yes, and that's when it aborts on my machine.  Do it several times and
> quickly, if it doesn't happen otherwise.

FWIW, it aborts because 'row' is 7, whereas matrix->nrows is 5.  From
these numbers, I'm guessing that the problem happens when Emacs tries
to redisplay the tool-bar window (which gets taller when you shrink
the frame width like this).

Some missing block_input somewhere, perhaps?