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bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs
From: |
Alan Third |
Subject: |
bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs |
Date: |
Sat, 19 Nov 2016 19:05:39 +0000 |
User-agent: |
Mutt/1.7.0 (2016-08-17) |
On Sat, Nov 19, 2016 at 08:12:07PM +0200, Eli Zaretskii wrote:
> > Date: Sat, 19 Nov 2016 15:51:12 +0000
> > From: Alan Third <alan@idiocy.org>
> > Cc: josh@berdine.net, 22818@debbugs.gnu.org
> >
> > (gdb) p s->face.id
> > $1 = 17
> > (gdb) p lface_id_to_name[17]
> > $2 = 31008
> > (gdb) xsymbol
> > $3 = (struct Lisp_Symbol *) 0x7ab8
> > Cannot access memory at address 0x7ac0
> > (gdb)
>
> So I guess that face was freed or otherwise made invalid. I thought
> we've got rid of these problems, sigh...
>
> If you start "emacs -Q", let Emacs start up, and then look at that
> face ID, do you see a valid symbol? IOW, do this:
>
> $ gdb ./emacs
> ...
> (gdb) break Fredraw_display
> (gdb) r -Q
>
> Then, after Emacs starts up, type "M-x redraw-display RET", and at the
> GDB prompt type:
>
> (gdb) p lface_id_to_name[17]
> (gdb) xsymbol
>
> What does that show?
>
> And what is the value of next_lface_id at that point?
(gdb) p lface_id_to_name[17]
$1 = 31008
(gdb) xsymbol
$2 = (struct Lisp_Symbol *) 0x7ab8
Cannot access memory at address 0x7ac0
(gdb) p next_lface_id
$3 = 84
--
Alan Third
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Josh Berdine, 2016/11/18
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Eli Zaretskii, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Alan Third, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Eli Zaretskii, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Alan Third, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Eli Zaretskii, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Alan Third, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Eli Zaretskii, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Alan Third, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Eli Zaretskii, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs,
Alan Third <=
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Eli Zaretskii, 2016/11/19
- bug#22818: 25.1.1 Emacs.app crash ns_compute_glyph_string_overhangs, Alan Third, 2016/11/19