compiz crashed with SIGSEGV in unity::launcher::Launcher::EnsureAnimation()

Happened multiple times today, unity trunk

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: compiz-core 1:0.9.7.0~bzr2995-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:

ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
Date: Thu Feb 16 13:22:20 2012
Disassembly: => 0x8: Cannot access memory at address 0x8
DistUpgraded: Log time: 2012-01-28 13:24:20.559134
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 5.100.82.38+bdcom, 3.2.0-15-generic, x86_64: installed
 bcmwl, 5.100.82.38+bdcom, 3.2.0-16-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Device [106b:00ea]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64+mac (20111012)
LocalLibraries: /usr/local/lib/libunity-core-5.0.so.5.0.0 /home/cimi/.compiz-1/plugins/libunityshell.so /home/cimi/.compiz-1/plugins/libunitymtgrabhandles.so
MachineType: Apple Inc. MacBookAir4,1
ProcCmdline: compiz
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-16-generic root=UUID=ab5a57da-feff-4ff0-a228-dd2a2c019c74 ro quiet splash i915.i915_enable_rc6=1 vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x8: Cannot access memory at address 0x8
 PC (0x00000008) not located in a known VMA region (needed executable region)!
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? ()
 unity::launcher::Launcher::EnsureAnimation (this=0x1bd6890) at /home/username/Development/unity/unity/plugins/unityshell/src/Launcher.cpp:500
 unity::launcher::Launcher::Launcher(nux::BaseWindow*, char const*, int)::{lambda()#2}::operator()() const () at /home/username/Development/unity/unity/plugins/unityshell/src/Launcher.cpp:191
 sigc::adaptor_functor<unity::launcher::Launcher::Launcher(nux::BaseWindow*, const char*, int)::<lambda()> >::operator()(void) const (this=0x1bd4a60) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
 sigc::internal::slot_call0<unity::launcher::Launcher::Launcher(nux::BaseWindow*, const char*, int)::<lambda()>, void>::call_it(sigc::internal::slot_rep *) (rep=0x1bd4a30) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
Title: compiz crashed with SIGSEGV in unity::launcher::Launcher::EnsureAnimation()
UpgradeStatus: Upgraded to precise on 2012-01-28 (18 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 10/14/2011
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA41.88Z.0077.B0E.1110141154
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-C08A6BB70A942AC2
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir4,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-C08A6BB70A942AC2
dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B0E.1110141154:bd10/14/2011:svnAppleInc.:pnMacBookAir4,1:pvr1.0:rvnAppleInc.:rnMac-C08A6BB70A942AC2:rvrMacBookAir4,1:cvnAppleInc.:ct10:cvrMac-C08A6BB70A942AC2:
dmi.product.name: MacBookAir4,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2