compiz crashed with SIGSEGV in PluginClassHandler<DecorWindow, CompWindow, 0>::get()

Binary package hint: compiz

This happened when enabling the "Extra WM Actions" plugin as per bug 723056

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4-0ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-7.36-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,move,regex,grid,imgpng,vpswitch,resize,animation,workarounds,mousepoll,snap,gnomecompat,place,wall,session,expo,ezoom,staticswitcher,fade,scale]
CompositorRunning: compiz
DRM.card0.DVI.D.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: Off
 modes: 1680x1050 1680x1050
 edid-base64: AP///////wAkTYcoAAAAAAAPAQOAIRV4CrylmFhViygkUFQAAAABAQEBAQEBAQEBAQEBAQEBHC+Q0GAaD0AgMBMAS88QAAAZRSeQ0GAaD0AgMBMAS88QAAAZAAAADwCzCjKzCigUAQAyDAAAAAAA/gBMUDE1NFcwMi1UTDA2AL8=
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1920x1200 1600x1200 1680x1050 1280x1024 1440x900 1280x960 1280x800 1024x768 800x600 800x600 640x480
 edid-base64: AP///////wBMLeYDNjJXVCMSAQMONyJ4Kv4hqFM3riQRUFQjCACpQIGAgUCBAJUAswABAQEBKDyAoHCwI0AwIDYAJlQhAAAaAAAA/QA4PB5REQAKICAgICAgAAAA/ABTeW5jTWFzdGVyCiAgAAAA/wBIVkRRODAwNDkwCiAgANc=
Date: Tue Mar 22 14:42:13 2011
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
   Subsystem: Lenovo T61 [17aa:20b5]
   Subsystem: Lenovo T61 [17aa:20b5]
MachineType: LENOVO 6465CTO
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdline: compiz
ProcCwd: /home/mdz
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=305dde78-d20a-4248-aaf4-09447b7c5791 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-7.36-generic 2.6.38
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f85cd02454a <_ZN18PluginClassHandlerI11DecorWindow10CompWindowLi0EE3getEPS1_+266>: mov 0x30(%rbp),%rax
 PC (0x7f85cd02454a) ok
 source "0x30(%rbp)" (0x00000030) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 PluginClassHandler<DecorWindow, CompWindow, 0>::get(CompWindow*) () from /usr/lib/compiz/libdecor.so
 DecorScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libdecor.so
 CompScreen::handleEvent(_XEvent*) ()
 ExtraWMScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libextrawm.so
 CompScreen::handleEvent(_XEvent*) ()
Title: compiz crashed with SIGSEGV in PluginClassHandler<DecorWindow, CompWindow, 0>::get()
UpgradeStatus: Upgraded to natty on 2011-02-10 (39 days ago)
UserGroups: adm admin audio cdrom dialout fuse kvm libvirtd lpadmin plugdev sambashare video
XorgConf: Error: [Errno 13] Permission denied: '/etc/X11/xorg.conf'
dmi.bios.date: 01/21/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LETB0WW (2.10 )
dmi.board.name: 6465CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7LETB0WW(2.10):bd01/21/2008:svnLENOVO:pn6465CTO:pvrThinkPadT61:rvnLENOVO:rn6465CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 6465CTO
dmi.product.version: ThinkPad T61
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4-0ubuntu7
version.libdrm2: libdrm2 2.4.23-1ubuntu5
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6