metacity crashed with SIGABRT in g_assertion_message()

[Steve Langasek]

Was toggling through windows at the time that included a gnome-terminal window and a firefox window that had a vimeo video loaded. The video rendering was stalling out; I don't know if this was a contributing cause, or an effect, of the wm crash.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: metacity 1:2.34.1-1ubuntu4
ProcVersionSignature: Ubuntu 3.1.0-3.3-generic 3.1.0
Uname: Linux 3.1.0-3-generic x86_64
ApportVersion: 1.25-0ubuntu1
Architecture: amd64
Date: Sat Nov 12 23:08:48 2011
ExecutablePath: /usr/bin/metacity
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
ProcCmdline: metacity --sm-client-id 10e5cc126abf0b176131576611918349900000023330047
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: metacity
StacktraceTop:
 g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: metacity crashed with SIGABRT in g_assertion_message()
UpgradeStatus: Upgraded to precise on 2011-11-08 (4 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin mythtv plugdev sambashare src

[Apport retracing service (apport)]

StacktraceTop:
 g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x463190 "meta_rectangle_edge_aligns", message=0x7fd50b467717 "code should not be reached") at /build/buildd/glib2.0-2.30.1/./glib/gtestutils.c:1425
 meta_rectangle_edge_aligns (rect=<optimized out>, edge=<optimized out>) at core/boxes.c:1165
 apply_edge_resistance (old_pos=770, new_pos=1422, old_rect=0x7fff4551fd40, new_rect=0x7fff4551fd60, edges=0x1026e60, resistance_data=<optimized out>, xdir=0, keyboard_op=0, window=<optimized out>, timeout_func=<optimized out>) at core/edge-resistance.c:391
 apply_edge_resistance_to_each_side (old_outer=0x7fff4551fd40, new_outer=0x7fff4551fd60, auto_snap=<optimized out>, keyboard_op=0, is_resize=0, display=<optimized out>, window=<optimized out>, timeout_func=<optimized out>) at core/edge-resistance.c:639
 meta_window_edge_resistance_for_move (window=0x10d7500, old_x=165, old_y=71, new_x=0x7fff4551fe08, new_y=0x7fff4551fe0c, timeout_func=<optimized out>, snap=0, is_keyboard_op=0) at core/edge-resistance.c:1162