[Bug 1319897] Re: gnome-shell crashed with SIGABRT in g_assertion_message()

[Tim]

Thanks Marius! Uploaded, can you add the SRU paperwork to the bug description 
see https://wiki.ubuntu.com/StableReleaseUpdates#SRU_Bug_Template

** Changed in: gnome-shell (Ubuntu Trusty)
       Status: Confirmed => Fix Committed

** Changed in: ubuntu-gnome
       Status: New => Fix Committed

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Title:
  gnome-shell crashed with SIGABRT in g_assertion_message()

Status in Ubuntu GNOME:
  Fix Committed
Status in “gnome-shell” package in Ubuntu:
  Confirmed
Status in “gnome-shell” source package in Trusty:
  Fix Committed
Status in “gnome-shell” source package in Utopic:
  Confirmed

Bug description:
  This happened on resume from S3 sleep.  It seems related to multi-
  monitor support: I had an external display connected via VGA that I
  unplugged at around the same time as I suspended the laptop.  The
  external display was unplugged when I woke the laptop up.

  There was a long pause with a blank screen before gnome-shell crashed
  and restarted (I've observed that pause in other gnome-shell crashes
  too; maybe it's just apport taking a long time to process the core
  dump?  dunno).  It then restarted, flashing the picture of my desktop
  before restoring the lock screen (this could have privacy/security
  implications).

  Bug 1190535 might be a duplicate; I can't tell.  The stack trace in
  that bug seems mangled.

  FWIW the crash was a SIGABRT due to

    assertion failed: (n_outputs == config->n_outputs)

  which was visible in the function arguments passed to
  g_assertion_message() in the stack trace shown by apport before I
  submitted this bug.  I don't trust the retracer bot not to mess up the
  stack trace like it usually does for PPA packages.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: gnome-shell 3.12.1-0ubuntu1~trusty1 [origin: LP-PPA-gnome3-team-gnome3-staging]
  ProcVersionSignature: Ubuntu 3.13.0-26.48-generic 3.13.11
  Uname: Linux 3.13.0-26-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Thu May 15 18:18:13 2014
  DisplayManager: gdm
  EcryptfsInUse: Yes
  ExecutablePath: /usr/bin/gnome-shell
  GsettingsChanges:
   b'org.gnome.desktop.interface' b'clock-show-seconds' b'true'
   b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
   b'org.gnome.desktop.interface' b'clock-show-date' b'true'
  InstallationDate: Installed on 2012-07-25 (659 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  ProcCmdline: /usr/bin/gnome-shell
  Signal: 6
  SourcePackage: gnome-shell
  Title: gnome-shell crashed with SIGABRT in g_assertion_message()
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (27 days ago)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare shared sudo wireshark

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