compiz crashed with SIGSEGV in __libc_free()

[William Grant]

Binary package hint: compiz

I committed the great crime of pressing Ctrl+Alt. Twice :(

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
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,vpswitch,mousepoll,wall,compiztoolbox,grid,gnomecompat,regex,snap,place,move,imgpng,resize,animation,session,expo,ezoom,unitymtgrabhandles,workarounds,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Thu Apr 7 13:43:13 2011
DistUpgraded: Log time: 2010-12-18 12:59:35.150985
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 fglrx, 8.840, 2.6.38-7-generic, x86_64: installed
 fglrx, 8.840, 2.6.38-8-generic, x86_64: installed
 virtualbox-ose, 4.0.4, 2.6.38-7-generic, x86_64: installed
 virtualbox-ose, 4.0.4, 2.6.38-8-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc Juniper [Radeon HD 5700 Series] [1002:68b8] (prog-if 00 [VGA controller])
   Subsystem: Hightech Information System Ltd. Device [1787:2288]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
InstallationMedia_: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: System manufacturer System Product Name
ProcCmdline: compiz --replace
ProcEnviron:
 LANGUAGE=en_AU:en
 LANG=en_AU.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=37b7e6a1-6597-40a0-b7a1-ad78f3945ea1 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f77158698c3 <__libc_free+83>: lock cmpxchg %esi,(%rbx)
 PC (0x7f77158698c3) ok
 source "%esi" ok
 destination "(%rbx)" (0x7f76b800001f) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 __libc_free (mem=0x7f76f80233f0) 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 2010-12-18 (110 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "ColorTiling" "on"
  Option "SwapbufferWait" "off"
 EndSection
XsessionErrors: (nautilus:24711): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
dmi.bios.date: 05/28/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1305
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A88TD-M
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1305:bd05/28/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A88TD-M:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.4+bzr20110406-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu11
version.libdrm2: libdrm2 2.4.24+git20110404.be8802a9-0ubuntu0sarvatt
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11.0+git20110406.cd2857fa-0ubuntu0sarvatt
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11.0+git20110406.cd2857fa-0ubuntu0sarvatt
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99+git20110405.cc7d1fa3-0ubuntu0sarvatt
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.902+git20110405.8dc99b30-0ubuntu0sarvatt
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110323.8378443b-0ubuntu0sarvatt

[Apport retracing service (apport)]

StacktraceTop:
 __libc_free (mem=0x7f76f80233f0) at malloc.c:3736
 g_buffer_free_gfree (buffer=0x3533a00) at /build/buildd/glib2.0-2.28.5/./glib/gbuffer.c:42
 g_variant_unref (value=0x31b5e40) at /build/buildd/glib2.0-2.28.5/./glib/gvariant-core.c:628
 g_hash_table_remove_all_nodes (hash_table=0x2d13f20, notify=1) at /build/buildd/glib2.0-2.28.5/./glib/ghash.c:492
 g_hash_table_unref (hash_table=0x2d13f20) at /build/buildd/glib2.0-2.28.5/./glib/ghash.c:854

[alexanghh (alexanghh)]

I did a alt+tab and compiz crashed and restarted.