GNU bug report logs - #13717
scrolling very fast makes emacs-nox segfault

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Troy Sankey <sankeytms <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: scrolling very fast makes emacs-nox segfault
Date: Thu, 14 Feb 2013 19:42:09 -0800

Steps:
1. install GNU Emacs 24.2 (openSUSE 12.2)
2. delete ~/.emacs
3. open gnome-terminal (I'm using gnome-shell)
4. $ emacs-nox
5. scroll very fast -- I've tried both mouse wheel and touchpad
6. segfault

I can't get a proper backtrace because I don't have the appropriate
debugging symbols. I've installed emacs-debuginfo and
emacs-nox-debuginfo, but that did not help.

Troy

Message #8 received at 13717 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Troy Sankey <sankeytms <at> gmail.com>
Cc: 13717 <at> debbugs.gnu.org
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Fri, 15 Feb 2013 10:01:52 +0200

> From: Troy Sankey <sankeytms <at> gmail.com>
> Date: Thu, 14 Feb 2013 19:42:09 -0800
> 
> Steps:
> 1. install GNU Emacs 24.2 (openSUSE 12.2)
> 2. delete ~/.emacs
> 3. open gnome-terminal (I'm using gnome-shell)
> 4. $ emacs-nox
> 5. scroll very fast -- I've tried both mouse wheel and touchpad
> 6. segfault

Scroll which file?  The *scratch* buffer is too short, and cannot be
scrolled.

> I can't get a proper backtrace because I don't have the appropriate
> debugging symbols. I've installed emacs-debuginfo and
> emacs-nox-debuginfo, but that did not help.

I hope someone can post a backtrace, because this is 100% not
reproducible on my system (but I don't have gnome-terminal or
gnome-shell).

Also, could you perhaps try a recent pretest of Emacs 24.3?  If that
problem doesn't exist there, it probably was already solved.

Message #11 received at 13717 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 13717 <at> debbugs.gnu.org, Troy Sankey <sankeytms <at> gmail.com>
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Fri, 15 Feb 2013 03:32:21 -0500

Eli Zaretskii wrote:

> I hope someone can post a backtrace, because this is 100% not
> reproducible on my system (but I don't have gnome-terminal or
> gnome-shell).

Nor on mine (I did try gnome-terminal inside gnome-shell, and scrolled
24.2 as fast as I could).

Message #14 received at 13717 <at> debbugs.gnu.org (full text, mbox):

From: Troy Sankey <sankeytms <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 13717 <at> debbugs.gnu.org
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Fri, 15 Feb 2013 10:25:57 -0800

[Message part 1 (text/plain, inline)]

> Scroll which file?  The *scratch* buffer is too short, and cannot be
> scrolled.

Yes, the *scratch* buffer (but any buffer will do). It doesn't visually
scroll, but on my machine scrolling produces a lot of audible bells and
emacs keeps saying "Beginning/End of buffer".

> I hope someone can post a backtrace, because this is 100% not
> reproducible on my system (but I don't have gnome-terminal or
> gnome-shell).

I was able to produce a backtrace by ensuring my *-debuginfo packages
were the same version as my emacs packages :P  I'm not entirely sure how
this bug tracker takes pastes... so I've attached it. Also mirrored
here: http://eserver.sytes.net/tmp/emacs-nox-scrolling-bt.txt

> Also, could you perhaps try a recent pretest of Emacs 24.3?  If that
> problem doesn't exist there, it probably was already solved.

I'm a little busy, but I'll get back to compiling emacs later today.

[emacs-nox-scrolling-bt.txt (text/plain, attachment)]

Message #17 received at 13717 <at> debbugs.gnu.org (full text, mbox):

From: Troy Sankey <sankeytms <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Glenn Morris <rgm <at> gnu.org>, 13717 <at> debbugs.gnu.org
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Sat, 16 Feb 2013 22:05:08 -0800

> I'm a little busy, but I'll get back to compiling emacs later today.

I compiled trunk, and it does not segfault no matter how fast I scroll.

I used the following flags:

 --with-gpm \
 --without-x \
 --without-sound \
 --without-sync-input \
 --without-xpm \
 --without-jpeg \
 --without-tiff \
 --without-gif \
 --without-png

which are the same flags used in the emacs RPM for openSUSE.

Message #20 received at 13717 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Troy Sankey <sankeytms <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 13717 <at> debbugs.gnu.org
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Sun, 17 Feb 2013 01:41:25 -0500

Troy Sankey wrote:

>> I'm a little busy, but I'll get back to compiling emacs later today.
>
> I compiled trunk, and it does not segfault no matter how fast I scroll.

Could you also try

http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.93.tar.xz

Message #23 received at 13717 <at> debbugs.gnu.org (full text, mbox):

From: Troy Sankey <sankeytms <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 13717 <at> debbugs.gnu.org
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Sat, 16 Feb 2013 23:33:03 -0800

Glenn Morris wrote:

> Could you also try
> 
> http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.93.tar.xz

Here are the results of my compile-spree:
http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.93.tar.xz -> works
http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.90.tar.gz -> works
ftp://ftp.gnu.org/gnu/emacs/emacs-24.2.tar.xz ---------------> crashes

Message #28 received at 13717-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 13717-done <at> debbugs.gnu.org
Subject: Re: bug#13717: scrolling very fast makes emacs-nox segfault
Date: Sun, 17 Feb 2013 14:13:36 -0500

Version: 24.3

Troy Sankey wrote:

> Here are the results of my compile-spree:
> http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.93.tar.xz -> works
> http://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.90.tar.gz -> works
> ftp://ftp.gnu.org/gnu/emacs/emacs-24.2.tar.xz ---------------> crashes

Great, thanks.
This means it (whatever it is) will be fixed in the upcoming Emacs 24.3
release.

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