compiz crashed with SIGABRT in __assert_fail_base()

[John Robert Sion]

compiz crashed with SIGABRT in raise()

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.6.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
CrashCounter: 1
Date: Sat Mar 17 01:04:09 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcCmdline: compiz --replace
Signal: 6
SourcePackage: unity
StacktraceTop:
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
 __assert_fail () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /usr/lib/compiz/libanimationaddon.so
Title: compiz crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to precise on 2012-03-13 (3 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 __assert_fail_base (fmt=0x26f438 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x1415410 "!mLastClipInGroup.empty()", file=0x1415448 "/build/buildd/compiz-plugins-extra-0.9.7.0~bzr9/animationaddon/src/polygon.cpp", line=1535, function=0x1415520 "virtual void PolygonAnim::drawGeometry()") at assert.c:94
 __GI___assert_fail (assertion=0x1415410 "!mLastClipInGroup.empty()", file=0x1415448 "/build/buildd/compiz-plugins-extra-0.9.7.0~bzr9/animationaddon/src/polygon.cpp", line=1535, function=0x1415520 "virtual void PolygonAnim::drawGeometry()") at assert.c:103
 PolygonAnim::drawGeometry (this=0x9d118c8) at /build/buildd/compiz-plugins-extra-0.9.7.0~bzr9/animationaddon/src/polygon.cpp:1535
 PrivateAnimWindow::glDrawGeometry (this=0x9b9e7a0) at /build/buildd/compiz-plugins-main-0.9.7.0~bzr19/animation/src/animation.cpp:1524
 GLWindow::glDrawGeometry (this=0x9d03c58) at /build/buildd/compiz-0.9.7.0+bzr3035/plugins/opengl/src/paint.cpp:602