compiz assert failure: compiz: /build/buildd/compiz-plugins-extra-0.9.4/animationaddon/src/polygon.cpp:1535: virtual void PolygonAnim::drawGeometry(): Assertion `!mLastClipInGroup.empty()' failed.

[antibushido]

Binary package hint: unity

this bug occurred when i closed an application windows and switched to another space on the desktop

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.8-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
AssertionMessage: compiz: /build/buildd/compiz-plugins-extra-0.9.4/animationaddon/src/polygon.cpp:1535: virtual void PolygonAnim::drawGeometry(): Assertion `!mLastClipInGroup.empty()' failed.
CrashCounter: 1
Date: Sat Apr 16 15:13:07 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: unity
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 __assert_fail () from /lib/i386-linux-gnu/libc.so.6
 PolygonAnim::drawGeometry() () from /usr/lib/compiz/libanimationaddon.so
Title: compiz assert failure: compiz: /build/buildd/compiz-plugins-extra-0.9.4/animationaddon/src/polygon.cpp:1535: virtual void PolygonAnim::drawGeometry(): Assertion `!mLastClipInGroup.empty()' failed.
UpgradeStatus: Upgraded to natty on 2011-03-25 (22 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (nautilus:1443): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (Do:1479): Wnck-CRITICAL **: wnck_set_client_type got called multiple times.

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #757739, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.