compiz crashed with SIGSEGV in std::_Deque_iterator<char, char&, char*> std::move_backward<char>()

[Eliah Kagan]

On an Oneiric i386 system in a 3D Unity session with compiz 1:0.9.5.0-0ubuntu5 and unity 4.8.0-0ubuntu2 shortly after installing updates (see attached dpkg.log) and experiencing bug 827176, compiz segfaulted in std::_Deque_iterator<char, char&, char*> std::move_backward<char>(). I do not have any more information about this problem, except to say that this computer sometimes suffers from overheating problems and was running slowly presumably for that reason, so perhaps that was involved in triggering the bug.

Shortly after experiencing this crash, I experienced the crash in bug 741652. However, the stack trace there does not look similar to this bug's (admittedly incomplete) trace. So I am not marking this as a duplicate of bug 741652.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.8.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic i686
Architecture: i386
Date: Tue Aug 16 10:58:57 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: unity
StacktraceTop:
 std::_Deque_iterator<char, char&, char*> std::move_backward<char>(std::_Deque_iterator<char, char const&, char const*>, std::_Deque_iterator<char, char const&, char const*>, std::_Deque_iterator<char, char&, char*>) () from /usr/lib/compiz/libunityshell.so
 void std::deque<char, std::allocator<char> >::_M_insert_aux<char const*>(std::_Deque_iterator<char, char&, char*>, char const*, char const*, unsigned int) () from /usr/lib/compiz/libunityshell.so
 ?? ()
Title: compiz crashed with SIGSEGV in std::_Deque_iterator<char, char&, char*> std::move_backward<char>()
UpgradeStatus: Upgraded to oneiric on 2011-06-18 (58 days ago)
UserGroups: adm admin dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 adaptor_functor (this=<optimized out>, _A_functor=<optimized out>) at /build/buildd/unity-4.8.2/plugins/unityshell/src/LensBar.cpp:57
 typed_slot_rep (this=<optimized out>, functor=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:38
 slot4<unity::dash::LensBar::LensBar()::<lambda(int, int, long unsigned int, long unsigned int)> > (this=<optimized out>, _A_func=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:769
 slot<unity::dash::LensBar::LensBar()::<lambda(int, int, long unsigned int, long unsigned int)> > (_A_func=<optimized out>, this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:1238
 unity::dash::LensBar::LensBar (this=0x9ce4ea0) at /build/buildd/unity-4.8.2/plugins/unityshell/src/LensBar.cpp:57

[Tim Penhey (thumper)]

I'm going to mark this as fix released due to the massive changes in unity from 4.8 to 4.24, and the code path that caused this no longer exists.