GNU bug report logs - #28770
25.3; Issue displaying Images after first image is displayed

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

From: Joseph Mingrone <jrm <at> ftfl.ca>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.3; Issue displaying Images after first image is displayed
Date: Mon, 09 Oct 2017 19:01:56 -0300

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

Hello,

Here is a recipe to replicate the problem.

- emacs -Q
- open an image file (displays fine)
- open more image files (displays an empty box while the error below
  is shown in the *Messages* buffer.)

ImageMagick error: no decode delegate for this image format `PNG' @
error/constitute.c/ReadImage/504

Other in #emacs on FreeNode confirmed they see the same problem.

This is with ImageMagick-6.9.9.15 installed.

Regards,

Joseph

In GNU Emacs 25.3.1 (amd64-portbld-freebsd11.1, GTK+ Version 3.22.15)
 of 2017-09-29 built on 11amd64-default-job-01
Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
Configured using:
 'configure --localstatedir=/var --with-gameuser=games:games
 --disable-acl --with-dbus --with-gnutls --with-modules --with-x
 --with-xml2 --with-file-notification=kqueue --with-sound=oss
 --with-x-toolkit=gtk3 --without-cairo --with-gif --with-jpeg
 --with-imagemagick --with-png --with-rsvg --with-tiff --with-xpm
 --without-gconf --without-gsettings --with-m17n-flt --with-libotf
 --without-toolkit-scroll-bars --with-xft --with-xim --without-xwidgets
 --x-libraries=/usr/local/lib --x-includes=/usr/local/include
 --prefix=/usr/local --mandir=/usr/local/man --disable-silent-rules
 --infodir=/usr/local/share/emacs/info/
 --build=amd64-portbld-freebsd11.1 'CFLAGS=-O2 -pipe -fstack-protector
 -fno-strict-aliasing' CPPFLAGS= 'LDFLAGS= -fstack-protector''

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS NOTIFY GNUTLS LIBXML2
FREETYPE M17N_FLT LIBOTF XFT ZLIB GTK3 X11 MODULES

Important settings:
  value of $LANG: en_CA.UTF-8
  locale-coding-system: utf-8-unix

Major mode: ERC

Minor modes in effect:
  semantic-minor-modes-format: ((:eval (if (or semantic-highlight-edits-mode semantic-show-unmatched-syntax-mode)  S)))
  pdf-occur-global-minor-mode: t
  magit-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  TeX-PDF-mode: t
  TeX-source-correlate-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-spelling-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
  erc-netsplit-mode: t
  erc-menu-mode: t
  erc-match-mode: t
  erc-log-mode: t
  erc-list-mode: t
  erc-pcomplete-mode: t
  erc-button-mode: t
  erc-stamp-mode: t
  erc-autojoin-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  flyspell-mode: t
  global-company-mode: t
  company-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  show-paren-mode: t
  savehist-mode: t
  global-auto-revert-mode: t
  counsel-mode: t
  ivy-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent messages:
Updating buffer list...done
Commands: m, u, t, RET, g, k, S, D, Q; q to quit; h for help
C-x C-g is undefined
QuitImageMagick error: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/504
ImageMagick error: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/504
Type C-c C-c to view the image as text.
ImageMagick error: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/504 [6 times]
ad-Advice-delete-char: Text is read-only [3 times]
Mark set
GNU Emacs 25.3.1 (amd64-portbld-freebsd11.1, GTK+ Version 3.22.15) of 2017-09-29

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Memory information:
((conses 16 12098537 1120710)
 (symbols 48 92394 1018)
 (miscs 40 1445 6655)
 (strings 32 424368 200871)
 (string-bytes 1 17839538)
 (vectors 16 139381)
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[signature.asc (application/pgp-signature, inline)]

Message #8 received at 28770 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: Joseph Mingrone <jrm <at> ftfl.ca>
Cc: 28770 <at> debbugs.gnu.org
Subject: Re: bug#28770: 25.3;
 Issue displaying Images after first image is displayed
Date: Mon, 09 Oct 2017 18:25:30 -0400

forcemerge 28633 28770
quit

Joseph Mingrone <jrm <at> ftfl.ca> writes:

> Hello,
>
> Here is a recipe to replicate the problem.
>
> - emacs -Q
> - open an image file (displays fine)
> - open more image files (displays an empty box while the error below
>   is shown in the *Messages* buffer.)
>
> ImageMagick error: no decode delegate for this image format `PNG' @
> error/constitute.c/ReadImage/504
>
> Other in #emacs on FreeNode confirmed they see the same problem.
>
> This is with ImageMagick-6.9.9.15 installed.

Apparently it is fixed in ImageMagic-6.9.9.18-1.

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28633#10

Message #15 received at 28770 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Nicolas Petton <nicolas <at> petton.fr>, Damien Cassou <damien <at> cassou.me>,
 s brown <sjbrown <at> live.co.uk>
Cc: Glenn Morris <rgm <at> gnu.org>, 28518 <at> debbugs.gnu.org, 28770 <at> debbugs.gnu.org,
 28632 <at> debbugs.gnu.org, 28633 <at> debbugs.gnu.org, 28626 <at> debbugs.gnu.org,
 Waleed Yousef <wyousef <at> fcih.net>, Joseph Mingrone <jrm <at> ftfl.ca>,
 Noam Postavsky <npostavs <at> users.sourceforge.net>, Eli Zaretskii <eliz <at> gnu.org>,
 Matt Lundin <mdl <at> imapmail.org>
Subject: Re: bug#28518: Daemon mode only renders the first image file loaded
Date: Mon, 16 Oct 2017 23:57:01 -0700

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

Nicolas Petton wrote:

> Apparently, the issue has been resolved in 6.9.9-18.

Yes, that's right. Still, the ImageMagick bug is so easy to work around, and the 
workaround so benign, that I installed the attached into the emacs-26 branch to 
do that.  Although Fedora will probably upgrade its ImageMagick version soon and 
this upgrade will eventually filter out to users, the testing hassles are 
significant in the meantime.

[0001-Work-around-ImageMagick-bug-825.patch (text/x-patch, attachment)]

Message #18 received at 28770 <at> debbugs.gnu.org (full text, mbox):

From: Damien Cassou <damien <at> cassou.me>
To: Paul Eggert <eggert <at> cs.ucla.edu>, Nicolas Petton <nicolas <at> petton.fr>,
 s brown <sjbrown <at> live.co.uk>
Cc: Glenn Morris <rgm <at> gnu.org>, 28518 <at> debbugs.gnu.org, 28770 <at> debbugs.gnu.org,
 28632 <at> debbugs.gnu.org, 28633 <at> debbugs.gnu.org, 28626 <at> debbugs.gnu.org,
 Waleed Yousef <wyousef <at> fcih.net>, Joseph Mingrone <jrm <at> ftfl.ca>,
 Noam Postavsky <npostavs <at> users.sourceforge.net>, Eli Zaretskii <eliz <at> gnu.org>,
 Matt Lundin <mdl <at> imapmail.org>
Subject: Re: bug#28518: Daemon mode only renders the first image file loaded
Date: Tue, 17 Oct 2017 09:19:52 +0200

Paul Eggert <eggert <at> cs.ucla.edu> writes:
> Yes, that's right. Still, the ImageMagick bug is so easy to work around, and the 
> workaround so benign, that I installed the attached into the emacs-26 branch to 
> do that.  Although Fedora will probably upgrade its ImageMagick
> version soon

the fixed ImageMagick is already in Fedora-s updates-testing and can be
installed with

    dnf --enablerepo=updates-testing update ImageMagick\*

-- 
Damien Cassou
http://damiencassou.seasidehosting.st

"Success is the ability to go from one failure to another without
losing enthusiasm." --Winston Churchill

Message #21 received at 28770 <at> debbugs.gnu.org (full text, mbox):

From: Nicolas Petton <nicolas <at> petton.fr>
To: Damien Cassou <damien <at> cassou.me>, Paul Eggert <eggert <at> cs.ucla.edu>,
 s brown <sjbrown <at> live.co.uk>
Cc: Glenn Morris <rgm <at> gnu.org>, 28518 <at> debbugs.gnu.org, 28770 <at> debbugs.gnu.org,
 28632 <at> debbugs.gnu.org, 28633 <at> debbugs.gnu.org, 28626 <at> debbugs.gnu.org,
 Waleed Yousef <wyousef <at> fcih.net>, Joseph Mingrone <jrm <at> ftfl.ca>,
 Noam Postavsky <npostavs <at> users.sourceforge.net>, Eli Zaretskii <eliz <at> gnu.org>,
 Matt Lundin <mdl <at> imapmail.org>
Subject: Re: bug#28518: Daemon mode only renders the first image file loaded
Date: Tue, 17 Oct 2017 10:53:48 +0200

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

Damien Cassou <damien <at> cassou.me> writes:

> the fixed ImageMagick is already in Fedora-s updates-testing and can be
> installed with
>
>     dnf --enablerepo=updates-testing update ImageMagick\*

Thanks, that worked for me as well.

Cheers,
Nico

[signature.asc (application/pgp-signature, inline)]

Message #24 received at 28770 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: sjbrown <at> live.co.uk, 28518 <at> debbugs.gnu.org, 28770 <at> debbugs.gnu.org,
 damien <at> cassou.me, 28633 <at> debbugs.gnu.org, nicolas <at> petton.fr,
 28626 <at> debbugs.gnu.org, wyousef <at> fcih.net, 28632 <at> debbugs.gnu.org, rgm <at> gnu.org,
 jrm <at> ftfl.ca, npostavs <at> users.sourceforge.net, mdl <at> imapmail.org
Subject: Re: bug#28518: Daemon mode only renders the first image file loaded
Date: Tue, 17 Oct 2017 17:42:05 +0300

> Cc: 28518 <at> debbugs.gnu.org, 28626 <at> debbugs.gnu.org, 28632 <at> debbugs.gnu.org,
>  28633 <at> debbugs.gnu.org, 28770 <at> debbugs.gnu.org, Glenn Morris <rgm <at> gnu.org>,
>  Noam Postavsky <npostavs <at> users.sourceforge.net>, Eli Zaretskii
>  <eliz <at> gnu.org>, Waleed Yousef <wyousef <at> fcih.net>,
>  Matt Lundin <mdl <at> imapmail.org>, Joseph Mingrone <jrm <at> ftfl.ca>
> From: Paul Eggert <eggert <at> cs.ucla.edu>
> Date: Mon, 16 Oct 2017 23:57:01 -0700
> 
> > Apparently, the issue has been resolved in 6.9.9-18.
> 
> Yes, that's right. Still, the ImageMagick bug is so easy to work around, and the 
> workaround so benign, that I installed the attached into the emacs-26 branch to 
> do that.  Although Fedora will probably upgrade its ImageMagick version soon and 
> this upgrade will eventually filter out to users, the testing hassles are 
> significant in the meantime.

Thanks.  However, IME such workarounds should be conditioned on the
pertinent versions of ImageMagick, otherwise they might get in the way
further down the road.

Message #27 received at 28770 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: sjbrown <at> live.co.uk, 28518 <at> debbugs.gnu.org, 28770 <at> debbugs.gnu.org,
 damien <at> cassou.me, 28633 <at> debbugs.gnu.org, nicolas <at> petton.fr,
 28626 <at> debbugs.gnu.org, wyousef <at> fcih.net, 28632 <at> debbugs.gnu.org, rgm <at> gnu.org,
 jrm <at> ftfl.ca, npostavs <at> users.sourceforge.net, mdl <at> imapmail.org
Subject: Re: bug#28518: Daemon mode only renders the first image file loaded
Date: Tue, 17 Oct 2017 11:24:40 -0700

On 10/17/2017 07:42 AM, Eli Zaretskii wrote:
> IME such workarounds should be conditioned on the
> pertinent versions of ImageMagick, otherwise they might get in the way
> further down the road.

Normally I'd do that, and I first wrote code to operate that way. 
However, in this particular case the version-number testing code (which 
must be done at runtime, and cannot be done via simple integer 
comparison) was significantly more complicated and error-prone than 
simply working around the bug everywhere. As the workaround changes 
Emacs to use ImageMagick the way most other programs use ImageMagick, 
it's unlikely to cause problems in the future.

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