compiz crashed with SIGSEGV in UnityScreen::getWindowPaintList()

[C de-Avillez]

dual-monitor setup. While jumping thru workspaces. There is bug 833214, but I will wait for apport to process the backtrace before acting on it.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.8.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Thu Aug 25 10:37:38 2011
ExecutablePath: /usr/bin/compiz
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f444bc41d84 <_ZN11UnityScreen18getWindowPaintListEv+100>: mov 0x10(%rax),%rdi
 PC (0x7f444bc41d84) ok
 source "0x10(%rax)" (0x0000000f) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 UnityScreen::getWindowPaintList() () from /usr/lib/compiz/libunityshell.so
 CompositeScreen::getWindowPaintList() () from /usr/lib/compiz/libcomposite.so
 PrivateGLScreen::paintOutputRegion(GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
 GLScreen::glPaintTransformedOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
 WallScreen::glPaintTransformedOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libwall.so
Title: compiz crashed with SIGSEGV in UnityScreen::getWindowPaintList()
UpgradeStatus: Upgraded to oneiric on 2011-08-22 (2 days ago)
UserGroups: adm admin cdrom dialout kismet kvm libvirtd lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 UnityScreen::getWindowPaintList (this=<optimized out>) at /build/buildd/unity-4.8.2/plugins/unityshell/src/unityshell.cpp:1048
 CompositeScreen::getWindowPaintList (this=0x1d0e660) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/composite/src/screen.cpp:924
 PrivateGLScreen::paintOutputRegion (this=0x1d6ad90, transform=..., region=..., output=<optimized out>, mask=7) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/opengl/src/paint.cpp:229
 GLScreen::glPaintTransformedOutput (this=0x1d6ad30, sAttrib=..., transform=<optimized out>, region=..., output=0x35edbd0, mask=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/opengl/src/paint.cpp:450
 WallScreen::glPaintTransformedOutput (this=0x2018a60, attrib=..., matrix=<optimized out>, region=<optimized out>, output=0x35edbd0, mask=7) at /build/buildd/compiz-plugins-main-0.9.5.92.bzr17/wall/src/wall.cpp:1312

[Tim Penhey (thumper)]

I'm closing this bug as fix released. The code has undergone massive change since this bug report, and there are no recent duplicates. Please open a new bug if things reoccur.