Public bug reported:

I had just started a download in Chromium and then clicked on the Home
Folder link in Unity. The whole PC hung for around 15 seconds and then
Compiz restarted with all applications working again.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.10.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-9.15-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Aug 31 08:44:39 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7ff50fc9d75d 
<_ZN11DecorScreen11handleEventEP7_XEvent+1677>:   mov    0x0(%r13),%r14
 PC (0x7ff50fc9d75d) ok
 source "0x0(%r13)" (0x00000021) not located in a known VMA region (needed 
readable region)!
 destination "%r14" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 DecorScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libdecor.so
 CompScreen::handleEvent(_XEvent*) ()
 CompScreen::handleEvent(_XEvent*) ()
 RegexScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libregex.so
 CompScreen::handleEvent(_XEvent*) ()
Title: compiz crashed with SIGSEGV in DecorScreen::handleEvent()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-crash oneiric running-unity

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https://bugs.launchpad.net/bugs/837880

Title:
  compiz crashed with SIGSEGV in DecorScreen::handleEvent()

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