compiz crashed with SIGSEGV in DecorWindow::computeShadowRegion()

[Michael Staengl]

probably it ist similar to bug #752754.
After installing an extension to google crome, a black rectangle appeared. I restarted unity 3d on my ubuntu 12.04, restart worked fine but after reordering my windows across my workspaces, compiz crashed again.
I think, its in both packages. Unity 5.4 and compiz 0.9.x

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
CrashCounter: 1
Date: Sun Mar 11 16:48:48 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
ProcCmdline: compiz --replace
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb3fa1413 <_ZN11DecorWindow19computeShadowRegionEv+1251>: testb $0xc,(%eax)
 PC (0xb3fa1413) ok
 source "$0xc" ok
 destination "(%eax)" (0x000001f0) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 DecorWindow::computeShadowRegion() () from /usr/lib/compiz/libdecor.so
 DecorWindow::update(bool) () from /usr/lib/compiz/libdecor.so
 DecorWindow::windowNotify(CompWindowNotify) () from /usr/lib/compiz/libdecor.so
 CompWindow::windowNotify(CompWindowNotify) () from /usr/lib/libcompiz_core.so.ABI-20120216
 WindowInterface::windowNotify(CompWindowNotify) () from /usr/lib/libcompiz_core.so.ABI-20120216
Title: compiz crashed with SIGSEGV in DecorWindow::computeShadowRegion()
UpgradeStatus: Upgraded to precise on 2012-03-10 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 DecorWindow::computeShadowRegion (this=0x96ff808) at /build/buildd/compiz-0.9.7.0~bzr2995/plugins/decor/src/decor.cpp:163
 DecorWindow::update (this=0x96ff808, allowDecoration=false) at /build/buildd/compiz-0.9.7.0~bzr2995/plugins/decor/src/decor.cpp:1527
 DecorWindow::windowNotify (this=0x96ff808, n=CompWindowNotifyUnreparent) at /build/buildd/compiz-0.9.7.0~bzr2995/plugins/decor/src/decor.cpp:2232
 CompWindow::windowNotify (this=0x9442d50, n=CompWindowNotifyUnreparent) at /build/buildd/compiz-0.9.7.0~bzr2995/src/window.cpp:2648
 WindowInterface::windowNotify (this=0x970cbf4, n=CompWindowNotifyUnreparent) at /build/buildd/compiz-0.9.7.0~bzr2995/src/window.cpp:5549

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 943116, so it 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. Feel free to continue to report any other bugs you may find.