From: "Jan Djärv" <jan.h.d@swipnet.se>
To: michael_heerdegen@web.de
Cc: 9999@debbugs.gnu.org
Subject: bug#9999: 23.3; menu related segfault when making new frame
Date: Thu, 10 Nov 2011 20:43:06 +0100 [thread overview]
Message-ID: <AAFB199F-2326-4C42-8FA4-4AE77DD02741@swipnet.se> (raw)
In-Reply-To: <87fwhykv20.fsf@web.de>
9 nov 2011 kl. 01:18 skrev Michael Heerdegen:
> Hi,
>
Hello.
This is what happens for me in the trunk.
x-create-frame is called. The frame is made official by putting it in Vframe_list.
A signal is raised, so the debugger is called in a new frame. This is also put in Vframe_list.
When we quit from the debugger, unwind_create_frame is called, and this test is done:
/* If frame is ``official'', nothing to do. */
if (!CONSP (Vframe_list) || !EQ (XCAR (Vframe_list), frame))
But the faulty frame isn't XCAR, the debugger frame is.
So the test fails and x_free_frame_resources is called and eventually sets f->output_data.x to NULL.
But the f->output_method is not reset, so when an event comes, we loop over Vframe_list and kaboom happens here:
if (!FRAME_X_P (f) || FRAME_X_DISPLAY_INFO (f) != dpyinfo) ...
FRAME_X_P only checks if f->output_method is output_x_window, which it is,
but FRAME_X_DISPLAY_INFO (f) is the same as f->output_data.x->display_info and as x is NULL, this crashes.
So ethier FRAME_X_P needs to be improved (ditto for all terms I guess), or unwind_create_frame needs a better check (also ditto for all terms?).
Jan D.
> starting with emacs -Q, when I eval the following expression:
>
>
> (let* ((pop-up-frames t))
> (define-key (lookup-key global-map [menu-bar]) [foo]
> '(menu-item "Foo" ignore :enable (file-exists-p "http://www.foo.com")))
> (setq default-directory "/")
> (make-frame))
>
>
> Emacs crashs.
>
> I was able to produce the crash on different hosts.
>
> I can provide a backtrace if needed.
>
>
> In GNU Emacs 23.3.1 (i486-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
> of 2011-10-26 on murphy, modified by Debian
> Windowing system distributor `The X.Org Foundation', version 11.0.11101901
> configured using `configure '--build' 'i486-linux-gnu' '--build' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.3/site-lisp:/usr/share/emacs/site-lisp' '--with-crt-dir=/usr/lib/i386-linux-gnu' '--with-x=yes' '--with-x-toolkit=lucid' '--with-toolkit-scroll-bars' '--without-gconf' 'build_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2''
>
> Important settings:
> value of $LC_ALL: de_DE.utf8
> value of $LC_COLLATE: nil
> value of $LC_CTYPE: nil
> value of $LC_MESSAGES: nil
> value of $LC_MONETARY: nil
> value of $LC_NUMERIC: nil
> value of $LC_TIME: C
> value of $LANG: de_DE.utf8
> value of $XMODIFIERS: nil
> locale-coding-system: utf-8-unix
> default enable-multibyte-characters: t
> v
>
next prev parent reply other threads:[~2011-11-10 19:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-09 0:18 bug#9999: 23.3; menu related segfault when making new frame Michael Heerdegen
2011-11-10 19:43 ` Jan Djärv [this message]
2011-11-11 1:59 ` Stefan Monnier
2011-11-11 18:35 ` Jan Djärv
2011-11-11 19:34 ` Eli Zaretskii
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=AAFB199F-2326-4C42-8FA4-4AE77DD02741@swipnet.se \
--to=jan.h.d@swipnet.se \
--cc=9999@debbugs.gnu.org \
--cc=michael_heerdegen@web.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.