unity-panel-service crashed with SIGSEGV in gtk_window_group_get_type()

[Ingo Gerth]

I was adjusting the volume in the sound menu when unity froze. After switching to tty-1 and back everything worked again, with apport popping up to report this bug.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0-3.4-generic 3.0.0-rc5
Uname: Linux 3.0-3-generic i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
Date: Thu Jul 7 17:39:19 2011
ExecutablePath: /usr/lib/unity/unity-panel-service
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110704.1)
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x9b1a27 <gtk_window_group_get_type+7>: call 0x711e07
 PC (0x009b1a27) ok
 source "0x711e07" (0x00711e07) ok
 destination "(%esp)" (0xbf534000) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 gtk_window_group_get_type () from /usr/lib/libgtk-3.so.0
 gtk_window_group_get_current_device_grab () from /usr/lib/libgtk-3.so.0
 gtk_widget_device_is_shadowed () from /usr/lib/libgtk-3.so.0
 ?? () from /usr/lib/libgtk-3.so.0
 g_cclosure_marshal_VOID__BOOLEAN () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in gtk_window_group_get_type()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 gtk_window_group_list_windows (window_group=0x8c50008) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkwindow.c:8454
 gtk_widget_get_root_window (widget=0x8cb3960) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkwidget.c:9490
 gtk_widget_pop_composite_child () at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkwidget.c:10441
 ?? ()

[Neil J. Patel (njpatel)]

Hi, we changed the way the volume control is implemented and we think this bug is now fixed in Oneiric. If this is not the case, please re-open the bug, thanks.