compiz crashed with SIGSEGV in PrivateWindow::addWindowStackChanges()

[citosid]

I has just install cairo dock

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: compiz-core 1:0.9.6-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CrashCounter: 1
Date: Wed Sep 28 09:04:31 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation 82Q35 Express Integrated Graphics Controller [8086:29b2] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Dell OptiPlex 755 [1028:0211]
   Subsystem: Dell OptiPlex 755 [1028:0211]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
MachineType: Dell Inc. OptiPlex 755
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=es_MX:es
 LANG=es_MX.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=7b164e38-c0ec-4cec-9b0a-ca27cea8fe6a ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x43f766 <_ZN13PrivateWindow21addWindowStackChangesEP14XWindowChangesP10CompWindow+38>: mov 0x68(%rdx),%rdi
 PC (0x0043f766) ok
 source "0x68(%rdx)" (0x00000068) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 PrivateWindow::addWindowStackChanges(XWindowChanges*, CompWindow*) ()
 CompWindow::lower() ()
 CompScreen::handleEvent(_XEvent*) ()
 PrivateCompositeScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libcomposite.so
 CompScreen::handleEvent(_XEvent*) ()
Title: compiz crashed with SIGSEGV in PrivateWindow::addWindowStackChanges()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 11/05/2007
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0DR845
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd11/05/2007:svnDellInc.:pnOptiPlex755:pvr:rvnDellInc.:rn0DR845:rvr:cvnDellInc.:ct3:cvr:
dmi.product.name: OptiPlex 755
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.6-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Apport retracing service (apport)]

StacktraceTop:
 PrivateWindow::addWindowStackChanges (this=0x208f5c0, xwc=0x7fff4268df70, sibling=0x0) at /build/buildd/compiz-0.9.6/src/window.cpp:3853
 CompWindow::lower (this=0x208fa20) at /build/buildd/compiz-0.9.6/src/window.cpp:3960
 CompScreen::handleEvent (this=0x1b25c70, event=0x206d970) at /build/buildd/compiz-0.9.6/src/event.cpp:1784
 PrivateCompositeScreen::handleEvent (this=0x1c5a740, event=0x206d970) at /build/buildd/compiz-0.9.6/plugins/composite/src/screen.cpp:102
 CompScreen::handleEvent (this=0x1b25c70, event=0x206d970) at /build/buildd/compiz-0.9.6/src/event.cpp:987

[Launchpad Janitor (janitor)]

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

[Till Kamppeter (till-kamppeter)]

Raised priority as it happened several times for me, also in the middle of a session. I am on Oneiric, 32-bit. I have reported it at least two times, once as duplicate bug 862217 and second as bug 862241 which will soon get joined to this one as a duplicate. Both on old HP Compaq 32-bit laptop.