compiz crashed with SIGSEGV in free()

[Peter Hansen]

Binary package hint: unity

Don't know what caused this.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Tue Apr 12 13:28:52 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_DK:en
 PATH=(custom, user)
 LANG=en_DK.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f517ca1688d <free+29>: mov -0x8(%rdi),%rsi
 PC (0x7f517ca1688d) ok
 source "-0x8(%rdi)" (0x012c01dd) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 free () from /lib/x86_64-linux-gnu/libc.so.6
 XFree () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 PrivateWindow::reparent() ()
 PrivateWindow::processMap() ()
 CompScreen::handleEvent(_XEvent*) ()
Title: compiz crashed with SIGSEGV in free()
UpgradeStatus: Upgraded to natty on 2011-04-11 (1 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 __libc_free (mem=0x12c01e5) at malloc.c:3709
 XFree (data=<value optimized out>) at ../../src/XlibInt.c:1701
 PrivateWindow::reparent (this=0x7f5174d27a40) at /build/buildd/compiz-0.9.4+bzr20110411/src/window.cpp:5707
 PrivateWindow::processMap (this=0x7f5174d27a40) at /build/buildd/compiz-0.9.4+bzr20110411/src/window.cpp:4607
 CompScreen::handleEvent (this=0x15309f0, event=0x7fffdd6f1960) at /build/buildd/compiz-0.9.4+bzr20110411/src/event.cpp:1664