compiz crashed with SIGSEGV in nux::WindowThread::GetWindowCompositor()

[Fahad Abid]

disabling scale add on on compiz settings manger caused crash of the unity 3d shell

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: libnux-2.0-0 2.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
ApportVersion: 1.94.1-0ubuntu1
Architecture: i386
Date: Fri Mar 9 18:29:09 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
ProcCmdline: compiz
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb45aad94 <_ZNK3nux12WindowThread19GetWindowCompositorEv+4>: mov 0xdc(%eax),%eax
 PC (0xb45aad94) ok
 source "0xdc(%eax)" (0x000000dc) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 nux::WindowThread::GetWindowCompositor() const () from /usr/lib/libnux-2.0.so.0
 nux::BaseWindow::PushToBack() () from /usr/lib/libnux-2.0.so.0
 unity::launcher::Launcher::OnUpdateDragManagerTimeout(void*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in nux::WindowThread::GetWindowCompositor()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #928573, 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.