compiz assert failure: *** glibc detected *** compiz: free(): invalid pointer: 0xb6deeff4 ***

[Nicolas DERIVE]

Using vlc button in unity menu to close it, I triggered this crash.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.16.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic-pae 3.0.4
Uname: Linux 3.0.0-11-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu1
Architecture: i386
AssertionMessage: *** glibc detected *** compiz: free(): invalid pointer: 0xb6deeff4 ***
CheckboxSubmission: c4273c0f4f2b8d26cd6bf31cadfd2912
CheckboxSystem: a871981cb5bdf4d6ebd55be46becf77e
CrashCounter: 1
Date: Mon Sep 19 12:05:09 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
ProcCmdline: compiz
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 LANGUAGE=fr_FR:fr:en_GB:en
Signal: 6
SourcePackage: unity
StacktraceTop:
 __libc_message (do_abort=2, fmt=0xb6db4080 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (action=<optimized out>, str=<optimized out>, ptr=0xb6deeff4) at malloc.c:6283
 _int_free (av=0xb6df0400, p=0xb6deefec) at malloc.c:4795
 __GI___libc_free (mem=0xb6deeff4) at malloc.c:3738
 XFree () from /usr/lib/i386-linux-gnu/libX11.so.6
Title: compiz assert failure: *** glibc detected *** compiz: free(): invalid pointer: 0xb6deeff4 ***
UpgradeStatus: Upgraded to oneiric on 2008-10-18 (1065 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev pulse pulse-access scanner tape users video

[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 #750386, 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.