compiz crashed with SIGSEGV in sigc::signal_base::impl()

[ubby]

Binary package hint: compiz

I get this Compiz bug when enabling the wobbly window effect in CCSM.
Ubuntu 11.04 (64 bit) daily build from today.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.2.1+glibmainloop3-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic x86_64
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/allscreens/options/active_plugins'
Date: Sun Jan 9 10:03:54 2011
ExecutablePath: /usr/bin/compiz
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110109)
MachineType: Gigabyte Technology Co., Ltd. P35-DQ6
PciDisplay: 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV670PRO [Radeon HD 3850] [1002:9505] (prog-if 00 [VGA controller])
ProcCmdline: /usr/bin/compiz
ProcEnviron:
 LANGUAGE=en_US.UTF-8:en
 LANG=en_US.UTF-8
 LC_MESSAGES=en_AG.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
RelatedPackageVersions:
 xserver-xorg 1:7.5+6ubuntu6
 libgl1-mesa-glx 7.9+repack-1ubuntu3
 libdrm2 2.4.22-2ubuntu1
 xserver-xorg-video-intel 2:2.13.901-2ubuntu2
 xserver-xorg-video-ati 1:6.13.2-1ubuntu2
SegvAnalysis:
 Segfault happened at: 0x7f27b119a4ce <_ZNK4sigc11signal_base4implEv+14>: mov 0x8(%rdi),%rax
 PC (0x7f27b119a4ce) ok
 source "0x8(%rdi)" (0x000000e8) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 sigc::signal_base::impl() const () from /usr/lib/libsigc-2.0.so.0
 sigc::signal_base::connect(sigc::slot_base const&) () from /usr/lib/libsigc-2.0.so.0
 UnityScreen::UnityScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
 CompManager::initPlugin(CompPlugin*) ()
Title: compiz crashed with SIGSEGV in sigc::signal_base::impl()
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 05/11/2007
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F4
dmi.board.name: P35-DQ6
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF4:bd05/11/2007:svnGigabyteTechnologyCo.,Ltd.:pnP35-DQ6:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP35-DQ6:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: P35-DQ6
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
glxinfo: Error: [Errno 2] No such file or directory
system: distro = Ubuntu, architecture = x86_64, kernel = 2.6.37-12-generic

[Apport retracing service (apport)]

StacktraceTop:
 sigc::signal_base::impl (this=0xe0) at ../../sigc++/signal_base.cc:145
 sigc::signal_base::connect (this=0xe0,
 UnityScreen (this=0x3338840,
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen (this=<value optimized out>, s=0x12aa9f0)
 CompManager::initPlugin (p=0x188cae0)