compiz crashed with SIGSEGV in lookup_type_node_I() from g_type_class_get_private() from signal_parse_name() from g_signal_emit_by_name() from g_strconcat()

[Vincent Ladeuil]

After upgrading this morning, I lost almost all my settings (icon size in the launcher, the commands plugin was disabled and my custom command and shortcuts erased as well as all other shortcuts for other plugins).

I was adding them back one by one when this happened.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: compiz-core 1:0.9.7.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
NonfreeKernelModules: wl nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.tmp.unity.support.test.0:

ApportVersion: 1.95-0ubuntu1
Architecture: amd64
CheckboxSubmission: 34f5a9de644359b1b8e0705e7e99fd74
CheckboxSystem: 7e42599bda39ea7ff8b528272b6ef52b
CompizPlugins: [core,composite,opengl,decor,place,imgpng,commands,regex,grid,vpswitch,compiztoolbox,session,unitymtgrabhandles,mousepoll,move,snap,resize,gnomecompat,wall,animation,expo,ezoom,workarounds,fade,scale,unityshell]
CompositorRunning: compiz
Date: Wed Mar 28 09:38:23 2012
DistUpgraded: 2012-01-17 11:23:50,036 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: Apple Inc. MacBookAir3,2
ProcCmdline: compiz
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic root=UUID=acc0d91e-aff8-4e6b-8410-d2a4cb7ed20d ro nomodeset quiet splash reboot=pci acpi_backlight=vendor vt.handoff=7
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
Title: compiz crashed with SIGSEGV in g_type_check_instance()
UpgradeStatus: Upgraded to precise on 2012-01-17 (70 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare wireshark
dmi.bios.date: 11/18/10
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA31.88Z.0061.B01.1011181342
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-942C5DF58193131B
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir3,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-942C5DF58193131B
dmi.modalias: dmi:bvnAppleInc.:bvrMBA31.88Z.0061.B01.1011181342:bd11/18/10:svnAppleInc.:pnMacBookAir3,2:pvr1.0:rvnAppleInc.:rnMac-942C5DF58193131B:rvrMacBookAir3,2:cvnAppleInc.:ct10:cvrMac-942C5DF58193131B:
dmi.product.name: MacBookAir3,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.7.2-0ubuntu4
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Apport retracing service (apport)]

StacktraceTop:
 lookup_type_node_I (utype=140734193761480) at /build/buildd/glib2.0-2.32.0/./gobject/gtype.c:400
 g_type_class_get_private (klass=0x2b14180, private_type=215) at /build/buildd/glib2.0-2.32.0/./gobject/gtype.c:4642
 signal_parse_name (force_quark=1, detail_p=<synthetic pointer>, itype=140733193388033, name=0x7fff3ba07cb0 "\360_Y\245\225\177") at /usr/include/x86_64-linux-gnu/bits/string3.h:52
 g_signal_emit_by_name (instance=0x45bc820, detailed_signal=0x7fff3ba07cb0 "\360_Y\245\225\177") at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3381
 g_strconcat (string1=0x73 <Address 0x73 out of bounds>) at /build/buildd/glib2.0-2.32.0/./glib/gstrfuncs.c:586

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.