compiz crashed with SIGSEGV in g_type_check_instance() from g_signal_emit_valist() from g_signal_emit() from bamf_matcher_on_stacking_order_changed()

[Paul White]

Disabling the Enhanced Desktop Zoon plugin crashed compiz.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: compiz-core 1:0.9.7.0+bzr3035-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-19.30-generic-pae 3.2.11
Uname: Linux 3.2.0-19-generic-pae i686
.tmp.unity.support.test.0:

ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,grid,resize,vpswitch,move,obs,commands,imgpng,place,gnomecompat,mousepoll,regex,session,animation,wall,workarounds,expo,unitymtgrabhandles,fade,scale,unityshell]
CompositorRunning: compiz
Date: Sun Mar 18 23:29:30 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI RV710 [Radeon HD 4350] [1002:954f] (prog-if 00 [VGA controller])
   Subsystem: PC Partner Limited Device [174b:e990]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120223.1)
MachineType: Dell Inc. Dimension 8400
ProcCmdline: compiz
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-19-generic-pae root=UUID=7c8052ce-7038-4917-a917-8c2dd8287d8b ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0xb70b14d1 <g_type_check_instance+33>: mov (%eax),%edx
 PC (0xb70b14d1) ok
 source "(%eax)" (0x00002b84) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_type_check_instance () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libbamf3.so.0
 g_cclosure_marshal_VOID__VOID () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: compiz crashed with SIGSEGV in g_type_check_instance()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 07/07/2006
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0U7077
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/07/2006:svnDellInc.:pnDimension8400:pvr:rvnDellInc.:rn0U7077:rvr:cvnDellInc.:ct6:cvr:
dmi.product.name: Dimension 8400
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.0+bzr3035-0ubuntu1
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Apport retracing service (apport)]

StacktraceTop:
 g_type_check_instance (type_instance=0x93f3480) at /build/buildd/glib2.0-2.31.20/./gobject/gtype.c:4073
 g_signal_emit_valist (instance=0x93f3480, signal_id=224, detail=0, var_args=0xbfd4b5bc "S;\v\267\020\307D\n6\365>\263\364\357\f\267\214\343\b\267p%\201\t\200\064?\tp%\201\t") at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3083
 g_signal_emit (instance=0x93f3480, signal_id=224, detail=0) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3352
 bamf_matcher_on_stacking_order_changed (proxy=0x9812570, matcher=0x93f3480) at /build/buildd/bamf-0.2.112/./lib/libbamf/bamf-matcher.c:197
 g_cclosure_marshal_VOID__VOID (closure=0x981a5f0, return_value=0x0, n_param_values=1, param_values=0xa44c710, invocation_hint=0xbfd4b760, marshal_data=0x0) at /build/buildd/glib2.0-2.31.20/./gobject/gmarshal.c:85

[Launchpad Janitor (janitor)]

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

[Jack Leigh (leighman)]

Happened for me after enabling wobbly windows plugin

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.