bug#12745: crash in bidi_pop_it during (idle) redisplay

[Eli Zaretskii]

> Date: Mon, 29 Oct 2012 22:24:12 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: alptekin.aker@gmail.com, 12745@debbugs.gnu.org
> 
> > Date: Mon, 29 Oct 2012 12:23:25 -0700
> > From: Ami Fischman <ami@fischman.org>
> > Cc: Eli Zaretskii <eliz@gnu.org>, 12745@debbugs.gnu.org
> > 
> > (gdb) p it->glyph_row->glyphs[1][20].object
> > $44 = 101922033
> > (gdb) xtype
> > Lisp_String
> > (gdb) xstring it->glyph_row->glyphs[1][20].object
> > $45 = (struct Lisp_String *) 0x61334f0
> >   ""
> > 
> > (gdb) p ((struct Lisp_String *)0x61334f0)->data
> > $48 = (unsigned char *) 0x4fe9388 ""
> 
> Thanks, this is clear.
> 
> Anyway, the problem happened at position 1295, which I believe is the
> newline that ends this line.  I need to think...

After some thinking, can you show the values of these members of
'struct it' in frame #7 of the crashed 24.2 session (using the core
file):

   it->n_overlay_strings
   it->overlay_strings_charpos
   it->sp