compiz crashed with SIGSEGV in free()

[Sergey "Shnatsel" Davidoff]

Binary package hint: compiz

I pressed Ctrl+Alt+t in the latest Unity daily build, and Compiz crashed with this error.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4-0ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-7.36-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: None
CurrentDmesg:
 [ 31.776494] tg3 0000:02:00.0: eth0: Link is up at 100 Mbps, full duplex
 [ 31.776498] tg3 0000:02:00.0: eth0: Flow control is off for TX and off for RX
 [ 31.776724] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
 [ 42.160038] eth0: no IPv6 routers present
 [ 1891.638150] compiz[4475]: segfault at 7f32ac00001f ip 00007f32f56d58c3 sp 00007fff7bfef650 error 6 in libc-2.13.so[7f32f5659000+19b000]
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x1024 1280x1024 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 640x480 640x480 640x480 720x400
 edid-base64: AP///////wAi8JImAQEBARERAQMOJh547u6Vo1RMmSYPUFSt74CBgAEBAQEBAQEBAQEBAQEBMCoAmFEAKkAwcBMAfCwRAAAeAAAA/QAwTBhTDgAKICAgICAgAAAA/ABIUCBMUDE5NjUKICAgAAAA/wBDTk43MTcwVDQyCiAgAMQ=
Date: Sun Mar 20 12:25:12 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GdmLog2:

GraphicsCard:
 Intel Corporation 82Q33 Express Integrated Graphics Controller [8086:29d2] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. Device [1462:7352]
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110319)
LiveMediaBuild_: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110319)
MachineType: Hewlett-Packard HP Compaq dx7400 Microtower
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz --
ProcVersionSignature_: Ubuntu 2.6.38-7.36-generic 2.6.38
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f32f56d58c3 <free+83>: lock cmpxchg %esi,(%rbx)
 PC (0x7f32f56d58c3) ok
 source "%esi" ok
 destination "(%rbx)" (0x7f32ac00001f) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 free () from /lib/x86_64-linux-gnu/libc.so.6
 g_value_unset () from /usr/lib/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/libgobject-2.0.so.0
 ?? () from /usr/lib/libgio-2.0.so.0
Title: compiz crashed with SIGSEGV in free()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (nautilus:4477): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (<unknown>:4475): libindicator-WARNING **: Shortcut Group does not have key 'TargetEnvironment' falling back to deprecated use of 'OnlyShowIn' and 'NotShowIn'.
 (nautilus:4477): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (nautilus:4477): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
dmi.bios.date: 10/25/2007
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: MS7352 1.08
dmi.board.name: 0AB8
dmi.board.vendor: MSI
dmi.chassis.asset.tag: CZC7515HNN
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrMS73521.08:bd10/25/2007:svnHewlett-Packard:pnHPCompaqdx7400Microtower:pvr:rvnMSI:rn0AB8:rvr:cvnMSI:ct3:cvr:
dmi.product.name: HP Compaq dx7400 Microtower
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.4-0ubuntu7
version.libdrm2: libdrm2 2.4.23-1ubuntu3
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=0x7f32ec2c3fb0) at malloc.c:3736
 g_value_unset (value=0x7f32ec009598) at /build/buildd/glib2.0-2.28.3/./gobject/gvalue.c:275
 g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=<value optimized out>) at /build/buildd/glib2.0-2.28.3/./gobject/gsignal.c:3012
 g_signal_emit (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>) at /build/buildd/glib2.0-2.28.3/./gobject/gsignal.c:3040
 emit_signal_instance_in_idle_cb (data=0x14141c0) at /build/buildd/glib2.0-2.28.3/./gio/gdbusconnection.c:3400

[Ilan (ilan)]

Seeing similar issues when I alt+tab to switch applications.

[Anderson (andersonkoerich-live)]

This happens to me when i press alt+f2 and it freezes unity and give this.

[Vlad Chi (defaultman)]

Affects me too. Exception happened when I tried to switch between desktops using <ctrl>+<alt>+<arrow>.