compiz crashed with SIGSEGV in __libc_free()

[Robert Ancell]

Binary package hint: compiz

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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
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
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 640x480
 edid-base64: AP///////wAGr+wgAAAAAAESAQOQIhN4CsiVnldUkiYPUFQAAAABAQEBAQEBAQEBAQEBAQEBJhtWR1AAJjAwIDQAWMEQAAAaJhtWR1AAJjAwIDQAWMEQAAAaAAAA/gBGNDE0SoBCMTU2WFcyAAAAAAAAAAAAAAAAAAEBCiAgAH4=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Thu Mar 31 10:15:03 2011
DistUpgraded: Log time: 2010-11-23 10:12:11.488849
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 virtualbox-ose, 4.0.4, 2.6.38-6-generic, x86_64: installed
 virtualbox-ose, 4.0.4, 2.6.38-7-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc M92 [Mobility Radeon HD 4500 Series] [1002:9553] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:02be]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100803.1)
InstallationMedia_: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100803.1)
MachineType: Dell Inc. Studio 1555
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_NZ:en
 LANG=en_AU.UTF-8
 LC_MESSAGES=en_NZ.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=bc5a0286-2218-4958-a40d-5d571d862783 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-7.39-generic 2.6.38
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f040019f8c3 <__libc_free+83>: lock cmpxchg %esi,(%rbx)
 PC (0x7f040019f8c3) ok
 source "%esi" ok
 destination "(%rbx)" (0x7f03b800001f) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 __libc_free (mem=0x7f03f8147150) at malloc.c:3736
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_variant_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_hash_table_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in __libc_free()
UpgradeStatus: Upgraded to natty on 2010-11-23 (127 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 11/07/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0C234M
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A08
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd11/07/2009:svnDellInc.:pnStudio1555:pvrA08:rvnDellInc.:rn0C234M:rvrA08:cvnDellInc.:ct8:cvrA08:
dmi.product.name: Studio 1555
dmi.product.version: A08
dmi.sys.vendor: Dell Inc.
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.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

[Apport retracing service (apport)]

StacktraceTop:
 __libc_free (mem=0x7f03f8147150) at malloc.c:3736
 g_buffer_free_gfree (buffer=0x263b5a0) at /build/buildd/glib2.0-2.28.4/./glib/gbuffer.c:42
 g_variant_unref (value=0x7f03f8167e60) at /build/buildd/glib2.0-2.28.4/./glib/gvariant-core.c:628
 g_hash_table_remove_all_nodes (hash_table=0x2655450, notify=1) at /build/buildd/glib2.0-2.28.4/./glib/ghash.c:492
 g_hash_table_unref (hash_table=0x2655450) at /build/buildd/glib2.0-2.28.4/./glib/ghash.c:854