GNU bug report logs - #24109
24.5; Long lines in message mode make Emacs irresponsive

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#24109: closed (24.5; Long lines in message mode make Emacs
 irresponsive)
Date: Sat, 08 Oct 2016 07:56:01 +0000

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

Your message dated Sat, 08 Oct 2016 10:55:13 +0300
with message-id <838ttzi8bi.fsf <at> gnu.org>
and subject line Re: bug#24109: 24.5; Long lines in message mode make Emacs irresponsive
has caused the debbugs.gnu.org bug report #24109,
regarding 24.5; Long lines in message mode make Emacs irresponsive
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
24109: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=24109
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Christophe Troestler <Christophe.Troestler <at> umons.ac.be>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 24.5; Long lines in message mode make Emacs irresponsive
Date: Fri, 29 Jul 2016 12:36:46 +0100

I am using mu4e <https://github.com/djcb/mu/> to read my mail and a spam 
mail with a very long subject line seems to trigger a bug in Emacs.  You 
can see the details (including a backtrace) at 
https://github.com/djcb/mu/issues/880




In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
of 2016-04-08 on binet, modified by Debian
Windowing system distributor `The X.Org Foundation', version 
11.0.11804000
System Description:	Debian GNU/Linux testing (stretch)

Configured using:
`configure --build x86_64-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/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp
--build x86_64-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/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp
--with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars
'CFLAGS=-g -O2 -fstack-protector-strong -Wformat
-Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
-D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro'
Important settings:
 value of $LC_MESSAGES: en_US.UTF-8
 value of $LC_MONETARY: en_GB.UTF-8
 value of $LC_NUMERIC: en_GB.UTF-8
 value of $LC_TIME: en_GB.UTF-8
 value of $LANG: en_US.UTF-8
 locale-coding-system: utf-8-unix

Major mode: Tuareg

Minor modes in effect:
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 auto-composition-mode: t
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 line-number-mode: t
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Recent messages:
[mu4e] Retrieving mail...done
[mu4e] Indexing... processed 79000, updated 2
[mu4e] Indexing completed; processed 79666, updated 2, cleaned-up 0
[mu4e] Contacts received: 9878
Making completion list... [6 times]
Please enter a number.
Quit
Making completion list...
2 days, 12 hours, 28 minutes, 51 seconds
Making completion list...

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pces-20 broken poe pym static apel-ver product mu4e-contrib mu4e desktop
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Memory information:
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(strings 32 158999 74865)
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(heap 1024 265606 14075))

[Message part 3 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: wavexx <at> thregr.org
Cc: 24109-done <at> debbugs.gnu.org, Christophe.Troestler <at> umons.ac.be,
 djcb <at> djcbsoftware.nl
Subject: Re: bug#24109: 24.5;
 Long lines in message mode make Emacs irresponsive
Date: Sat, 08 Oct 2016 10:55:13 +0300

> Date: Sun, 02 Oct 2016 10:09:53 +0300
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: 24109 <at> debbugs.gnu.org, djcb <at> djcbsoftware.nl,
> 	Christophe.Troestler <at> umons.ac.be
> 
> > From: Yuri D'Elia <wavexx <at> thregr.org>
> > Cc: 24109 <at> debbugs.gnu.org, djcb <at> djcbsoftware.nl, Christophe.Troestler <at> umons.ac.be
> > Date: Sat, 01 Oct 2016 20:25:57 +0200
> > 
> > Ok, after some testing, I was able to get a self-contained test case.
> > I was successfully able to test this into the current git's master with
> > emacs -q, built with lucid as the main toolkit.
> > 
> > Please load-file the attached sample. It will create a *test* buffer,
> > using a quoted representation of (buffer-substring) which is sufficient
> > to recreate the problem.
> > 
> > It will move the point to the beginning of the last line, as well as
> > switching on truncate-lines. Having the point on the beginning of the
> > line is important.
> > 
> > Switch to the *test* buffer and move up. It will hang at the "Luciaine"
> > line. I'm also attaching a screenshot of my current window state.
> > 
> > If you toggle auto-hscroll-mode instead, before scrolling, you'll see
> > how the cursor disappears instead when exactly at the beginning of the
> > line.
> 
> Thanks, I will look into this soon.

Tis is now fixed on the emacs-25 branch.

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