compiz crashed with SIGSEGV in free()

[Falk Pauser]

Binary package hint: compiz

it just crashed when i was working with rubymine, terminator and google chrome

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110406-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Ist ein Verzeichnis: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 270.30 Fri Feb 25 14:34:55 PST 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu1)
Architecture: amd64
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]
CompositorRunning: compiz
CrashCounter: 1
Date: Thu Apr 7 09:43:22 2011
DistUpgraded: Log time: 2011-04-04 10:04:54.791721
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 3.2.12, 2.6.35-28-generic, x86_64: installed
 nvidia-current, 270.30, 2.6.38-7-generic, x86_64: installed
 nvidia-current, 270.30, 2.6.35-28-generic, x86_64: installed
 nvidia-current, 270.30, 2.6.38-8-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 nVidia Corporation G86 [GeForce 8500 GT] [10de:0421] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: XFX Pine Group Inc. Device [1682:2306]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
InstallationMedia_: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
JockeyStatus: xorg:nvidia_current - Beschleunigter Grafiktreiber von NVIDIA (Proprietär, Aktiviert, In Benutzung)
MachineType: Dell Inc. OptiPlex 745
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=de_DE:en
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=c3499b7f-c2a6-456b-802f-ff3b3814a006 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7ff046ca62b4: mov 0x8(%rax),%rcx
 PC (0x7ff046ca62b4) ok
 source "0x8(%rax)" (0x7ff03008910008) not located in a known VMA region (needed readable region)!
 destination "%rcx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 free () from /lib/x86_64-linux-gnu/libc.so.6
 g_value_unset () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: compiz crashed with SIGSEGV in free()
UpgradeStatus: Upgraded to natty on 2011-04-04 (2 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 03/01/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.6.4
dmi.board.name: 0HR330
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.6.4:bd03/01/2010:svnDellInc.:pnOptiPlex745:pvr:rvnDellInc.:rn0HR330:rvr:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 745
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110406-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu11
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #742300, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.