compiz crashed with SIGSEGV in _int_free()

Binary package hint: compiz

I just suddenly got a crash reporter dialog for compiz - not sure what caused it.

I'm running the Ubuntu 11.04 prerelease.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4git20110322-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/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 4.5.2-6ubuntu4)
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,compiztoolbox,regex,snap,grid,gnomecompat,move,vpswitch,place,animation,expo,resize,wall,workarounds,fade,session,ezoom,switcher,scale,unityshell]
CompositorRunning: compiz
Date: Mon Mar 28 11:47:48 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 270.30, 2.6.38-6-generic, x86_64: installed
 nvidia-current, 270.30, 2.6.38-7-generic, x86_64: installed
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 nVidia Corporation G92 [GeForce 9800 GT] [10de:0614] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: PC Partner Limited Device [174b:9210]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110202)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110202)
JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
MachineType: Gateway FX4710-UB003A
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=ac6ecce3-8595-477d-a9e0-8a89fcfb1a73 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-7.39-generic 2.6.38
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f7e228c12b4 <_int_free+180>: mov 0x8(%rax),%rcx
 PC (0x7f7e228c12b4) ok
 source "0x8(%rax)" (0x7f7e181ec9a008) not located in a known VMA region (needed readable region)!
 destination "%rcx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 _int_free (av=0x7f7e1800001f, p=0x7f7e181c5220) at malloc.c:4892
 __libc_free (mem=<value optimized out>) at malloc.c:3738
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in _int_free()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 05/16/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 841P041G
dmi.board.name: G33M05G1
dmi.board.vendor: Gateway
dmi.board.version: MP
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Gateway
dmi.chassis.version: OEM
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr841P041G:bd05/16/2008:svnGateway:pnFX4710-UB003A:pvrOEM:rvnGateway:rnG33M05G1:rvrMP:cvnGateway:ct3:cvrOEM:
dmi.product.name: FX4710-UB003A
dmi.product.version: OEM
dmi.sys.vendor: Gateway
version.compiz: compiz 1:0.9.4git20110322-0ubuntu5
version.libdrm2: libdrm2 2.4.23-1ubuntu5
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 1:7.6~3ubuntu11
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