compiz crashed with SIGSEGV in unity::hud::Controller::~Controller()

[Aurélien RIVIERE]

I run Unity 2D with Metacity because Compiz have a lifetime of 5 secondes on my session so I currently can't run Unity 2D + Compiz (LP #980185) ).
I was on guest session with Unity to check if the bug #980185 affects the guest session.
Returning on my session (which uses Metacity) , I had an Apport Window for a Compiz bug.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu3
Architecture: i386
Date: Sun Apr 15 18:32:02 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb74442a9: mov %ecx,0x8(%ebp)
 PC (0xb74442a9) ok
 source "%ecx" ok
 destination "0x8(%ebp)" (0x02000010) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 g_return_if_fail_warning () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_source_remove () from /lib/i386-linux-gnu/libglib-2.0.so.0
 unity::hud::Controller::~Controller() () from /usr/lib/compiz/libunityshell.so
 unity::hud::Controller::~Controller() () from /usr/lib/compiz/libunityshell.so
 std::_Sp_counted_ptr<unity::hud::Controller*, (__gnu_cxx::_Lock_policy)2>::_M_dispose() () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in g_return_if_fail_warning()
UpgradeStatus: Upgraded to precise on 2012-02-27 (48 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 g_return_if_fail_warning (log_domain=0xb716012e "GLib", pretty_function=0xb7166c6e "g_source_remove", expression=0xb71668be "tag > 0") at /build/buildd/glib2.0-2.32.0/./glib/gmessages.c:801
 g_source_remove (tag=0) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:1850
 unity::hud::Controller::~Controller (this=0xa1f11c0, __in_chrg=<optimized out>) at /build/buildd/unity-5.10.0/plugins/unityshell/src/HudController.cpp:93
 unity::hud::Controller::~Controller (this=0xa1f11c0, __in_chrg=<optimized out>) at /build/buildd/unity-5.10.0/plugins/unityshell/src/HudController.cpp:94
 std::_Sp_counted_ptr<unity::hud::Controller*, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=0xac271e8) at /usr/include/c++/4.6/bits/shared_ptr_base.h:293