unity-window-decorator crashed with SIGSEGV in gdk_window_impl_x11_get_colormap()

[Max Bowsher]

Spontaneous crash of the window decorator - can't point to any obvious trigger.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-gnome 1:0.9.4+bzr20110606-0ubuntu1~natty2
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,regex,resize,grid,resizeinfo,compiztoolbox,animation,snap,move,mousepoll,vpswitch,expo,imgpng,gnomecompat,session,firepaint,workarounds,unitymtgrabhandles,wall,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
Date: Thu Aug 11 15:33:41 2011
DistUpgraded: Log time: 2011-04-14 17:26:43.973050
DistroCodename: natty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/unity-window-decorator
GraphicsCard:
 ATI Technologies Inc RV730 [FirePro V5700] [1002:949f] (prog-if 00 [VGA controller])
   Subsystem: ATI Technologies Inc Device [1002:2542]
MachineType: Dell Inc. Precision WorkStation T3500
ProcCmdline: /usr/bin/unity-window-decorator
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=/dev/mapper/vg0-syslv ro
ProcVersionSignature_: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f4f2acfda66 <gdk_window_impl_x11_get_colormap+150>: mov 0x8(%rax),%rsi
 PC (0x7f4f2acfda66) ok
 source "0x8(%rax)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 gdk_window_impl_x11_get_colormap (drawable=0x1875730) at /build/buildd/gtk+2.0-2.24.4/gdk/x11/gdkwindow-x11.c:380
 gdk_window_real_get_visual (drawable=0x15d57e0) at /build/buildd/gtk+2.0-2.24.4/gdk/gdkwindow.c:5011
 _gdk_x11_copy_to_image (drawable=0x1875730, image=0x14809a0, src_x=0, src_y=0, dest_x=0, dest_y=32, width=16, height=16) at /build/buildd/gtk+2.0-2.24.4/gdk/x11/gdkimage-x11.c:487
 IA__gdk_drawable_copy_to_image (drawable=0x1875730, image=0x14809a0, src_x=0, src_y=0, dest_x=0, dest_y=32, width=16, height=16) at /build/buildd/gtk+2.0-2.24.4/gdk/gdkdraw.c:1156
 IA__gdk_drawable_copy_to_image (drawable=0x15d57e0, image=0x14809a0, src_x=0, src_y=0, dest_x=0, dest_y=32, width=16, height=16) at /build/buildd/gtk+2.0-2.24.4/gdk/gdkdraw.c:1156
Title: unity-window-decorator crashed with SIGSEGV in gdk_window_impl_x11_get_colormap()
UpgradeStatus: Upgraded to natty on 2011-04-14 (118 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare sbuild
dmi.bios.date: 09/09/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: 0XPDFK
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA03:bd09/09/2009:svnDellInc.:pnPrecisionWorkStationT3500:pvr:rvnDellInc.:rn0XPDFK:rvrA01:cvnDellInc.:ct7:cvr:
dmi.product.name: Precision WorkStation T3500
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[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 #754649, 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.