gnome-shell crashed with SIGABRT in g_assertion_message()

[Dave Stroud]

This occures when I have firefox oppened. It will freeze, mouse and keyboard have no affect on it. If you wait a minute or two firefox will close on it own,with this crash occuring.

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: gnome-shell 3.12.2-1ubuntu6
ProcVersionSignature: Ubuntu 3.16.0-21.28-generic 3.16.4
Uname: Linux 3.16.0-21-generic x86_64
ApportVersion: 2.14.7-0ubuntu5
Architecture: amd64
CrashCounter: 1
CurrentDesktop: GNOME
Date: Fri Oct 10 13:28:52 2014
DisplayManager: gdm
ExecutablePath: /usr/bin/gnome-shell
InstallationDate: Installed on 2014-07-23 (79 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
ProcCmdline: /usr/bin/gnome-shell
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: gnome-shell
StacktraceTop:
 g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 meta_window_unmanage () from /usr/lib/libmutter.so.0
 ?? () from /usr/lib/libmutter.so.0
 ?? () from /usr/lib/libmutter.so.0
Title: gnome-shell crashed with SIGABRT in g_assertion_message()
UpgradeStatus: Upgraded to utopic on 2014-10-04 (6 days ago)
UserGroups: adm audio avahi avahi-autoipd backup bin cdrom colord crontab daemon debian-spamd dialout dip disk fax floppy fuse games gdm gnats irc list lp lpadmin mail operator plugdev proxy root sambashare sudo tape users utempter uuidd video whoopsie

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1351011, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.