gnome-panel crashed with SIGSEGV in gtk_widget_verify_invariants()

[Alberts Muktupāvels]

...

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: gnome-panel 1:3.5.4-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-13.13-generic 3.5.3
Uname: Linux 3.5.0-13-generic x86_64
ApportVersion: 2.5.1-0ubuntu3
Architecture: amd64
Date: Wed Aug 29 07:45:00 2012
ExecutablePath: /usr/bin/gnome-panel
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120809.1)
ProcCmdline: gnome-panel
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f81487c3209: mov 0x80(%rax),%ecx
 PC (0x7f81487c3209) ok
 source "0x80(%rax)" (0xaaaaaaaaaaaaab2a) not located in a known VMA region (needed readable region)!
 destination "%ecx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-panel
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 gtk_widget_size_allocate () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? ()
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-panel crashed with SIGSEGV in gtk_widget_size_allocate()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 gtk_widget_verify_invariants (widget=0x20869e0) at /build/buildd/gtk+3.0-3.5.12/./gtk/gtkwidget.c:8485
 gtk_widget_size_allocate (widget=0x2223000, allocation=allocation@entry=0x7fffb5d474d0) at /build/buildd/gtk+3.0-3.5.12/./gtk/gtkwidget.c:4972
 gtk_menu_bar_size_allocate (widget=<optimized out>, allocation=<optimized out>) at /build/buildd/gtk+3.0-3.5.12/./gtk/gtkmenubar.c:601
 panel_menu_bar_object_size_allocate (widget=0x21b6020, allocation=0x7fffb5d47b10) at panel-menu-bar-object.c:154
 g_closure_invoke (closure=0x1f24c80, return_value=0x0, n_param_values=2, param_values=0x7fffb5d47750, invocation_hint=0x7fffb5d476f0) at /build/buildd/glib2.0-2.33.10/./gobject/gclosure.c:777

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.