compiz crashed with SIGSEGV in emit()

[Josep-Lluís Font-García]

compiz crashed when trying to configure it. In fact, I didn't succeed because crashed BEFORE I chaged any configuration.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: i386
Date: Wed Feb 15 15:25:30 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20111213)
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x2e7b257 <_ZN5unity8launcher12LauncherIcon22OnDelayedUpdateTimeoutEPv+71>: cmp %edx,0x8(%eax)
 PC (0x02e7b257) ok
 source "%edx" ok
 destination "0x8(%eax)" (0x00000009) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::launcher::LauncherIcon::OnDelayedUpdateTimeout(void*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in unity::launcher::LauncherIcon::OnDelayedUpdateTimeout()
UpgradeStatus: Upgraded to precise on 2012-02-06 (9 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 emit (_A_a1=@0xbfccf8a8, impl=0x1) at /usr/include/sigc++-2.0/sigc++/signal.h:1002
 emit (_A_a1=@0xbfccf8a8, this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/signal.h:2781
 unity::launcher::LauncherIcon::OnDelayedUpdateTimeout (data=0xb45bff0) at /build/buildd/unity-5.2.0/plugins/unityshell/src/LauncherIcon.cpp:826
 g_timeout_dispatch (source=0xb31d468, callback=0x2e7b210 <unity::launcher::LauncherIcon::OnDelayedUpdateTimeout(void*)>, user_data=0xb45bff0) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3854
 g_main_dispatch (context=0x94b1d90) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:2510