Subject: bug#12251: 24.2.50; crash in note_mouse_highlight

From: Eli Zaretskii <[email-masked]>
Date: Sat, 01 Sep 2012 12:40:29 +0300

> From: Sam Steingold <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>,  [email-masked]
> Date: Thu, 23 Aug 2012 09:19:36 -0400
> 
> > BTW I see that note_mouse_highlight has
> >
> >   /* Not on a window -> return.  */
> >   if (!WINDOWP (window))
> >     return;
> >
> > Shouldn't the window be live here?
> 
> definitely!

Are you saying that non-live windows can have valid mouse-highlight
information in them?  If so, the code that makes those windows dead is
the culprit.  Which code makes a live window dead?