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

[piratemurray]

******* Could be a duplicate of bug #916879 . Sorry, I don't know enough to determine. **********

Steps to reprpduce:

1) Start Gwibber
2) Switch to another program using alt-tab

Expected results:
alt-tab dialogue appears

Actual result:
Desktop appears to crash. Sometimes returns to desktop. Sometimes hangs involving a hard reset.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.25-generic-pae 3.0.13
Uname: Linux 3.0.0-15-generic-pae i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Wed Jan 18 10:40:19 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::switcher::SwitcherController::CompareSwitcherItemsPriority(AbstractLauncherIcon*, AbstractLauncherIcon*) () from /usr/lib/compiz/libunityshell.so
 void std::__insertion_sort<__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)>(__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, __gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)) () from /usr/lib/compiz/libunityshell.so
 unity::switcher::SwitcherController::Show(unity::switcher::SwitcherController::ShowMode, unity::switcher::SwitcherController::SortMode, bool, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> >) () from /usr/lib/compiz/libunityshell.so
 UnityScreen::altTabInitiateCommon(CompAction*, unsigned int, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/compiz/libunityshell.so
 UnityScreen::altTabForwardInitiate(CompAction*, unsigned int, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in unity::switcher::SwitcherController::CompareSwitcherItemsPriority()
UpgradeStatus: Upgraded to oneiric on 2011-11-30 (48 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 unity::switcher::SwitcherController::CompareSwitcherItemsPriority (first=0xab3f400, second=0xa3820a0) at /build/buildd/unity-4.28.0/plugins/unityshell/src/SwitcherController.cpp:354
 std::__insertion_sort<__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)> (__first=..., __last=..., __comp=0xb47a9f80 <unity::switcher::SwitcherController::CompareSwitcherItemsPriority(AbstractLauncherIcon*, AbstractLauncherIcon*)>) at /usr/include/c++/4.6/bits/stl_algo.h:2129
 __final_insertion_sort<__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*> >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)> (__last=<optimized out>, __first=<optimized out>, __comp=<optimized out>) at /usr/include/c++/4.6/bits/stl_algo.h:2201
 sort<__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*> >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)> (__comp=<optimized out>, __last=<optimized out>, __first=<optimized out>) at /usr/include/c++/4.6/bits/stl_algo.h:5370
 unity::switcher::SwitcherController::Show (this=0xaabae68, show=unity::switcher::SwitcherController::ALL, sort=unity::switcher::SwitcherController::FOCUS_ORDER, reverse=false, results=...) at /build/buildd/unity-4.28.0/plugins/unityshell/src/SwitcherController.cpp:74

[Launchpad Janitor (janitor)]

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

[Camille Appert (bibinou)]

Just curious, does a 5.x milestone means it won't be backported in Oneiric ?