bug#11257: http://thread.gmane.org/gmane.emacs.orgmode/54775

[Eli Zaretskii]

> From: Marius Hofert <marius.hofert@math.ethz.ch>
> Date: Mon, 16 Apr 2012 21:07:31 +0200
> 
> I described the problem here:
> http://stackoverflow.com/questions/10164425/emacs-almost-random-crashes-about-2-3-times-a-day-on-mac-os-x/10176670#10176670
> 
> and in more detail here:
> http://thread.gmane.org/gmane.emacs.orgmode/54775

FWIW, the backtrace you posted indicates that the crash happens when
Emacs attempts to display a tooltip.  I'm guessing that the crash was
here:

  w = XWINDOW (window);

because 'window' is not a window object.

> Please let me know if you need more details.

It would be nice to know where exactly it crashes inside
remember_mouse_glyph, and why.