GNU bug report logs - #33990
27.0.50; image-transform-fit-to-height/-width violates assert

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Benjamin Riefenstahl <b.riefenstahl <at> turtle-trading.net>
Subject: bug#33990: closed (Re: bug#33990: 27.0.50; image-transform-fit-to-height/-width
 violates assert)
Date: Fri, 25 Jan 2019 08:35:02 +0000

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

Your bug report

#33990: 27.0.50; image-transform-fit-to-height/-width violates assert

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 33990 <at> debbugs.gnu.org.

-- 
33990: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=33990
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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

From: Eli Zaretskii <eliz <at> gnu.org>
To: Benjamin Riefenstahl <b.riefenstahl <at> turtle-trading.net>
Cc: 33990-done <at> debbugs.gnu.org
Subject: Re: bug#33990: 27.0.50;
 image-transform-fit-to-height/-width violates assert
Date: Fri, 25 Jan 2019 10:33:59 +0200

> From: Benjamin Riefenstahl <b.riefenstahl <at> turtle-trading.net>
> Cc: 33990 <at> debbugs.gnu.org
> Date: Sat, 19 Jan 2019 18:21:06 +0100
> 
> How about fixing the bug and documentation on emacs-26 (patches 1 and 2)
> and making the behaviour change (patch 3) on master?

Done, thanks.

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

From: Benjamin Riefenstahl <b.riefenstahl <at> turtle-trading.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; image-transform-fit-to-height/-width violates assert
Date: Sat, 05 Jan 2019 18:26:06 +0100

When I resize images, using image-transform-fit-to-height or
image-transform-fit-to-width, the scaling is performed but than
image-transform-check-size is called and signals an error.  This uses
ImageMagick 6.9.7.4 as installed by Debian GNUS/Linux 9.6 (stretch).

Also, because the scale factor is kept globally after that operation (is
that intentional BTW?), loading other images afterwards also runs into
that error, thus image-mode fails to execute and instead in new image
buffers the raw bytes are shown.

I can reproduce this on emacs-26 as well as master with "emacs -Q" with
PBM and with JPEG images.


In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2019-01-03 built on arrian
Repository revision: f7ccac9f9d82019d4d5ba3182200422fbc9c7e67
Repository branch: harfbuzz
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description: Debian GNU/Linux 9 (stretch)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB
NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ LIBOTF
XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM THREADS LCMS2 GMP

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

Major mode: Emacs-Lisp

Minor modes in effect:
  global-magit-file-mode: t
  magit-file-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  shell-dirtrack-mode: t
  desktop-save-mode: t
  display-time-mode: t
  diff-auto-refine-mode: t
  delete-selection-mode: t
  cua-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

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