[Pkg-gmagick-im-team] Bug#773980: libmagickcore-6.q16-2: 8:6.8.9.9-4 breaks images in GNU Emacs 24 (displayed as single colour rectangles)

[Adam Sjøgren]

Package: libmagickcore-6.q16-2
Version: 8:6.8.9.9-4
Severity: normal

When displaying an image in GNU Emacs 24 (package emacs24), after upgrading
from ImageMagick 8:6.8.9.9-3 to 8:6.8.9.9-4, images with :type 'imagemagick
are displayed as single colour rectangles.

With 8:6.8.9.9-3 the image is (scaled and) displayed as expected:

 * http://koldfront.dk/misc/gnu-emacs/my-test-image-testing.png

With 8:6.8.9.9-4 a blue rectangle appears instead:

 * http://koldfront.dk/misc/gnu-emacs/my-test-image-unstable.png

To reproduce:

 * Install emacs24
 * Run emacs --no-init-file my-test-image.el
   Type M-x eval-buffer
   Where the file my-test-image.el contains:

== =
(defun my-test-image ()
  (let* ((image (create-image "/usr/share/emacs/24.4/etc/images/splash.xpm"))
         (magnitude 2.0)
         (size (image-size image t))
         (spec (cdr image)))
    (plist-put spec :type 'imagemagick)
    (plist-put spec :width  (round (* (car size) magnitude)))
    (plist-put spec :height (round (* (cdr size) magnitude)))
    (insert-image image)))

(my-test-image) ;; M-x eval-buffer should insert a scaled splash image.
                ;; With 8:6.8.9.9-4 a blue rectangle is shown instead.
== =

(The actual scaling is not necessary to trigger the problem, I only kept it to
illustrate why setting :type 'imagemagick might be relevant.)

If I go back to ImageMagick from testing:

== =
$ wajig install libmagickcore-6.q16-2:amd64/testing libmagickwand-6.q16-2/testing libmagick++-6-headers/testing libmagick++-6.q16-dev/testing libmagick++-dev/testing libmagickcore-6-arch-config/testing libmagickcore-6-headers/testing libmagickcore-6.q16-dev/testing libmagickwand-6-headers/testing libmagickwand-6.q16-dev/testing
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Selected version '8:6.8.9.9-3' (Debian:testing [all]) for 'libmagickwand-6-headers'
Selected version '8:6.8.9.9-3' (Debian:testing [amd64]) for 'libmagickcore-6-arch-config'
Selected version '8:6.8.9.9-3' (Debian:testing [all]) for 'imagemagick-common' because of 'libmagickcore-6-arch-config'
Selected version '8:6.8.9.9-3' (Debian:testing [amd64]) for 'libmagickcore-6.q16-2'
Selected version '8:6.8.9.9-3' (Debian:testing [amd64]) for 'libmagickcore-6.q16-dev'
Selected version '8:6.8.9.9-3' (Debian:testing [amd64]) for 'libmagickwand-6.q16-2'
Selected version '8:6.8.9.9-3' (Debian:testing [amd64]) for 'libmagickwand-6.q16-dev'
Selected version '8:6.8.9.9-3' (Debian:testing [all]) for 'libmagick++-dev'
Selected version '8:6.8.9.9-3' (Debian:testing [all]) for 'libmagickcore-6-heade
Selected version '8:6.8.9.9-3' (Debian:testing [amd64]) for 'libmagick++-6.q16-d
Selected version '8:6.8.9.9-3' (Debian:testing [all]) for 'libmagick++-6-headers
The following extra packages will be installed:
  imagemagick-common libmagick++-6.q16-5 libmagickcore-6.q16-2-extra
The following packages will be DOWNGRADED:
  imagemagick-common libmagick++-6-headers libmagick++-6.q16-5 libmagick++-6.q16
  libmagickcore-6.q16-dev libmagickwand-6-headers libmagickwand-6.q16-2 libmagic
0 upgraded, 0 newly installed, 13 downgraded, 0 to remove and 1 not upgraded.
Need to get 0 B/4,994 kB of archives.
After this operation, 476 kB of additional disk space will be used.
== =

Then the image is displayed correctly, as seen in the first screenshot.

-- System Information:
Debian Release: 8.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=da_DK.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)

Versions of packages libmagickcore-6.q16-2 depends on:
ii  dpkg                1.17.22
ii  imagemagick-common  8:6.8.9.9-4
ii  libbz2-1.0          1.0.6-7+b2
ii  libc6               2.19-13
ii  libfftw3-double3    3.3.4-2
ii  libfontconfig1      2.11.0-6.3
ii  libfreetype6        2.5.2-2koldfront1
ii  libgcc1             1:4.9.2-9
ii  libgomp1            4.9.2-9
ii  libjbig0            2.1-3.1
ii  libjpeg62-turbo     1:1.3.1-11
ii  liblcms2-2          2.6-3+b3
ii  liblqr-1-0          0.4.2-2
ii  libltdl7            2.4.2-1.11
ii  liblzma5            5.1.1alpha+20120614-2+b3
ii  libpng12-0          1.2.50-2+b2
ii  libtiff5            4.0.3-11
ii  libx11-6            2:1.6.2-3
ii  libxext6            2:1.3.3-1
ii  libxml2             2.9.2+dfsg1-1+b1
ii  multiarch-support   2.19-13
ii  zlib1g              1:1.2.8.dfsg-2+b1

Versions of packages libmagickcore-6.q16-2 recommends:
ii  ghostscript  9.06~dfsg-1.1+b1
ii  gsfonts      1:8.11+urwcyr1.0.7~pre44-4.2

Versions of packages libmagickcore-6.q16-2 suggests:
ii  libmagickcore-6.q16-2-extra  8:6.8.9.9-4

-- no debconf information