compiz crashed with SIGSEGV in unity::switcher::SwitcherController::~SwitcherController()

[Dan']

Ubuntu release :
 Description: Ubuntu oneiric (development branch)
 Release: 11.10
unity:
 Installé : 4.20.0-0ubuntu2
 Candidat : 4.20.0-0ubuntu2
 Table de version : *** 4.20.0-0ubuntu2 0
        500 http://fr.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
        100 /var/lib/dpkg/status
compiz:
 Installé : 1:0.9.6+bzr20110929-0ubuntu1
 Candidat : 1:0.9.6+bzr20110929-0ubuntu1
 Table de version : *** 1:0.9.6+bzr20110929-0ubuntu1 0
 500 http://fr.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
 100 /var/lib/dpkg/status
The Dash was not showing (got the frame but nothing inside) so I execute an 'unity --replace' and got the compiz crash.
After the bug compiz just restarted and all is running fine.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.20.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Fri Sep 30 15:21:42 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110921.2)
ProcCmdline: compiz
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x14721a3 <_ZN5unity8switcher18SwitcherControllerD2Ev+35>: mov (%eax),%edx
 PC (0x014721a3) ok
 source "(%eax)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::switcher::SwitcherController::~SwitcherController() () from /usr/lib/compiz/libunityshell.so
 unity::switcher::SwitcherController::~SwitcherController() () from /usr/lib/compiz/libunityshell.so
 UnityScreen::~UnityScreen() () from /usr/lib/compiz/libunityshell.so
 UnityScreen::~UnityScreen() () from /usr/lib/compiz/libunityshell.so
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::finiScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in unity::switcher::SwitcherController::~SwitcherController()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 unity::switcher::SwitcherController::~SwitcherController (this=0x897c648, __in_chrg=<optimized out>) at /build/buildd/unity-4.20.0/plugins/unityshell/src/SwitcherController.cpp:55
 unity::switcher::SwitcherController::~SwitcherController (this=0x897c648, __in_chrg=<optimized out>) at /build/buildd/unity-4.20.0/plugins/unityshell/src/SwitcherController.cpp:56
 UnityScreen::~UnityScreen (this=0x86d09c8, __in_chrg=<optimized out>) at /build/buildd/unity-4.20.0/plugins/unityshell/src/unityshell.cpp:319
 UnityScreen::~UnityScreen (this=0x86d09c8, __in_chrg=<optimized out>) at /build/buildd/unity-4.20.0/plugins/unityshell/src/unityshell.cpp:340
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::finiScreen (this=0x86c6998, s=0x8390530) at /usr/include/compiz/core/plugin.h:243

[Launchpad Janitor (janitor)]

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

[Omer Akram (om26er)]

non of the duplicate bug reporter know for sure what caused the crash. though there are three duplicates so I confirmed it and I am not sure if the stacktrace is useful or not.

[Chris Watt (chris-network-13)]

May not be useful but before it crashed on me it seemed as if the cursor wasn't able to accurately click on things, I would have to move about 20pixels below things to be able to click on them, I did unity --replace to see if it fixed it and immediately after doing so compiz crashed.

[Doug McMahon (mc3man)]

Pretty straightforward cause here on fresh 10/02 install
Open ccsm, disable the grid plugin
Get the typical loss of response in ccsm for 10 secs or so, then compiz resets & apport pops up

[graingert (tagrain)]

I got this after running the Gimp

[Tim Penhey (thumper)]

I'm 98% certain that I've fixed this bug as a drive by fix while doing something else.

If the controller was destroyed without having anyone actually alt-tab, it would explode.

[Garry (s61kiwi)]

I seem to get it using Libreoffice. No real rhyme nor reason I can tell.

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity - 4.22.0-0ubuntu1

---------------
unity (4.22.0-0ubuntu1) oneiric; urgency=low

  * New upstream release.
    - unity 3d firefox window borders disappear (LP: #861143)
    - Desktop drawn with offset (LP: #862743)
    - Crash when selecting Evolution in alt-tab (LP: #859431)
    - unity-panel-service crashed with SIGSEGV in g_type_check_instance_cast()
      - with a11y enabled (LP: #829367)
    - compiz crashed with SIGSEGV in
      unity::switcher::SwitcherController::~SwitcherController() (LP: #863302)
    - compiz assert failure: *** glibc detected *** compiz: double free or
      corruption (!prev): 0x00007fa248593900 *** (LP: #862938)
    - Onboard can cause unity to crash (LP: #863693)
    - compiz crashed with SIGSEGV in LauncherIcon::SetHasWindowOnViewport()
      (LP: #863652)
    - Dash opens the wrong application after scrolling in the application list
      (LP: #863555)
    - Categories "Applications" and "Files and folders" are untranslated
      (LP: #865430)
    - focus nautilus desktop to get focus at startup (LP: #863037)
    - The 'Desktop' label isn't shown if you use "Show desktop" in alt + tab
      (LP: #863129)
    - UIFe: Remove Ubuntu logo again from desktop title (LP: #865150)
    - compiz assert failure: *** glibc detected *** compiz: free(): corrupted
      unsorted chunks: 0x0000000004a1d390 *** (LP: #863303)
    - Fix a mem leak
    - compiz crashed with SIGSEGV in unity::dash::LensView::~LensView()
      (LP: #863191)
 -- Didier Roche <email address hidden> Tue, 04 Oct 2011 15:45:58 +0200