** Changed in: gdk-pixbuf
       Status: Unknown => Fix Released

** Changed in: gdk-pixbuf
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/1174253

Title:
  Segfault (core dumped) in gdk-pixbuf on upgrade

Status in pixbuf library for gtk+:
  Fix Released
Status in “gdk-pixbuf” package in Ubuntu:
  Fix Released
Status in “gdk-pixbuf” source package in Precise:
  In Progress

Bug description:
  [ Description ]

  In the Raring cycle, libgobject gained a global constructor.

  If a dynamically loaded module (by gdk-pixbuf-query-modules, which is
  called by a postinst trigger in this package, so quite common on
  upgrades) happens to dlclose() libgobject then we get this crash.

  This can easily happen in dist-upgrades if you get unlucky with the
  ordering.

  [ Proposed fix ]

  Build with -Wl,--no-as-needed to ensure we get linked against
  libgobject even though we use none of its symbols.

  In later glib & gdk-pixbuf releases, there's a function
  g_type_ensure() which is used for this purpose, but we don't have that
  in 12.04.

  [ Development Fix ]

  Described above: g_type_ensure() is used.

  [ Regression potential ]

  Not sure. The library will now be linked against more things so it
  could be a bit slower to initialise.

  [ QA ]

  1. Be in a precise chroot without precise-proposed
  2. apt-get install libgdk-pixbuf2.0-0
  3. sed -i 's/precise/trusty/' /etc/apt/sources.list
  4. apt-get update
  5. apt-get install libglib2.0-0
  6. /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders # or 
your arch here
  # that should have segfaulted
  7. echo 'deb http://archive.ubuntu.com/ubuntu precise-proposed main' | tee -a 
/etc/apt/sources.list
  8. apt-get update
  9. apt-get install libgdk-pixbuf2.0-0/precise-proposed
  10. /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders # or 
your arch here
  # that should have worked

  [ Original description ]

  In two machines I had errors in the upgrade from Precise to Raring.

  Preparing to replace librsvg2-2:i386 2.36.3-0ubuntu1 (using 
.../librsvg2-2_2.36.4-1_i386.deb) ...
  Unpacking replacement librsvg2-2:i386 ...
  Processing triggers for libgdk-pixbuf2.0-0:i386 ...
  Segmentation fault (core dumped)
  Processing triggers for libgdk-pixbuf2.0-0:amd64 ...
  Segmentation fault (core dumped)
  Setting up librsvg2-2:i386 (2.36.4-1) ...
  Setting up librsvg2-2:amd64 (2.36.4-1) ...
  Setting up librsvg2-common:i386 (2.36.4-1) ...
  Setting up librsvg2-common:amd64 (2.36.4-1) ...
  Processing triggers for libc-bin ...
  ldconfig deferred processing now taking place
  Processing triggers for libgdk-pixbuf2.0-0:i386 ...
  Segmentation fault (core dumped)
  Processing triggers for libgdk-pixbuf2.0-0:amd64 ...
  Segmentation fault (core dumped)
  (Reading database ...
  (Reading database ... 5%
  (Reading database ... 10%

  I guess that due to that error, the gdk-pixbuf-query-loaders crashes
  later in the installation process.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: libgdk-pixbuf2.0-0 2.28.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.5.0-27.46-generic 3.5.7.7
  Uname: Linux 3.5.0-27-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  Date: Mon Apr 29 12:17:40 2013
  InstallationDate: Installed on 2009-11-25 (1251 days ago)
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  MarkForUpload: True
  SourcePackage: gdk-pixbuf
  UpgradeStatus: Upgraded to raring on 2013-04-29 (0 days ago)

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