compiz crashed with SIGSEGV in g_source_unref()

[William Grant]

Binary package hint: compiz

Running Compiz without Unity at the moment. Nothing in particular seems to trigger the crashes.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Wed Mar 2 23:52:25 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcCmdline: /usr/bin/compiz
ProcEnviron:
 LANGUAGE=en_AU:en
 LANG=en_AU.utf8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f1799a1efa5 <g_source_unref+5>: mov 0x20(%rdi),%rsi
 PC (0x7f1799a1efa5) ok
 source "0x20(%rdi)" (0x12001d500000186) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_source_unref () from /lib/libglib-2.0.so.0
 PrivateScreen::~PrivateScreen() ()
 PrivateScreen::~PrivateScreen() ()
 CompScreen::~CompScreen() ()
 CompScreen::~CompScreen() ()
Title: compiz crashed with SIGSEGV in g_source_unref()
UpgradeStatus: Upgraded to natty on 2010-12-18 (74 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 g_source_unref (source=0x12001d500000166) at /build/buildd/glib2.0-2.28.1/./glib/gmain.c:1734
 ~RefPtr (this=0x2445ab0, __in_chrg=<value optimized out>) at /usr/include/glibmm-2.4/glibmm/refptr.h:207
 PrivateScreen::~PrivateScreen (this=0x2445ab0, __in_chrg=<value optimized out>) at /build/buildd/compiz-0.9.4/src/screen.cpp:4781
 PrivateScreen::~PrivateScreen (this=0x2445ab0, __in_chrg=<value optimized out>) at /build/buildd/compiz-0.9.4/src/screen.cpp:4783
 CompScreen::~CompScreen (this=0x24459f0, __in_chrg=<value optimized out>) at /build/buildd/compiz-0.9.4/src/screen.cpp:4688