unity-panel-service crashed with SIGSEGV in append_cache_item()

[Till Kamppeter]

Tried to log out by clicking "Log out" in the "Off button" menu in the top bar via touch screen.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: unity-services 7.1.0+13.10.20130920-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
Uname: Linux 3.11.0-8-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.12.4-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CrashCounter: 1
Date: Mon Sep 23 16:58:28 2013
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:2205]
InstallationDate: Installed on 2013-06-05 (110 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130605)
MachineType: LENOVO 334729G
MarkForUpload: True
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-8-generic root=UUID=80d8eb01-b0c3-47cc-8dba-1ed122b2be4f ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x4061eb: mov 0x0(%rbp),%rdx
 PC (0x004061eb) ok
 source "0x0(%rbp)" (0x00000051) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/libatk-bridge-2.0.so.0
 g_hash_table_foreach () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libatk-bridge-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libatk-bridge-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_hash_table_foreach()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
dmi.bios.date: 02/05/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: GDET92WW (1.52 )
dmi.board.asset.tag: Not Available
dmi.board.name: 334729G
dmi.board.vendor: LENOVO
dmi.board.version: Win8 Pro DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGDET92WW(1.52):bd02/05/2013:svnLENOVO:pn334729G:pvrThinkPadTwist:rvnLENOVO:rn334729G:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 334729G
dmi.product.version: ThinkPad Twist
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.10+13.10.20130920-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu6
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Mon Sep 23 16:55:25 2013
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 890
 vendor LGD
xserver.version: 2:1.14.2.901-2ubuntu4

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 append_cache_item (obj=0x7f7488029140, data=0x7fffc5dba1d0) at cache-adaptor.c:156
 g_hash_table_foreach (hash_table=0x1c134c0, func=func@entry=0x7f74a0dd3540 <append_accessible_hf>, user_data=user_data@entry=0x7fffc5dba1d0) at /build/buildd/glib2.0-2.37.93/./glib/ghash.c:1526
 spi_cache_foreach (cache=<optimized out>, func=func@entry=0x7f74a0dd3540 <append_accessible_hf>, data=data@entry=0x7fffc5dba1d0) at accessible-cache.c:417
 impl_GetItems (bus=<optimized out>, message=<optimized out>, user_data=<optimized out>) at cache-adaptor.c:318