compiz crashed with SIGSEGV in sigc::signal_base::impl()

[Jonas Eberle]

Binary package hint: unity

This time I set "Window Animations" to true in compizconfig-settings-manager that provoked the error. The same symptoms appeared on another occasion without changing compiz-settings.

Symptoms:
compiz restarted several times. When the mouse cursor was usable again, I was able to operate all windows and clickspots, but redraws would not always happen, resulting in visual artifacts of windows, buttons, icons etc.

Tried:
Switching desktops did also not redraw, but still showed the existing graphics output (clickspots not usable then, of course).
Switching to console (CTRL+ALT+F1) and back did just restore the same state.
Logging out of the session did not bring up gdm, but a blank screen.

Supposed cause:
I guess the cause could be in display-driver xorg-server-intel, provoked by compiz or not I am uncertain.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.6.8-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
Architecture: i386
CrashCounter: 1
Date: Wed Mar 30 14:09:57 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=de:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x111e3d <_ZNK4sigc11signal_base4implEv+29>: mov 0x4(%edi),%esi
 PC (0x00111e3d) ok
 source "0x4(%edi)" (0x0000007c) not located in a known VMA region (needed readable region)!
 destination "%esi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 sigc::signal_base::impl() const () from /usr/lib/libsigc-2.0.so.0
 sigc::signal_base::connect(sigc::slot_base const&) () from /usr/lib/libsigc-2.0.so.0
 UnityScreen::UnityScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
 CompManager::initPlugin(CompPlugin*) ()
Title: compiz crashed with SIGSEGV in sigc::signal_base::impl()
UpgradeStatus: Upgraded to natty on 2011-03-23 (7 days ago)
UserGroups: adm admin cdrom dialout dip fax floppy fuse lpadmin plugdev sambashare tape video

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #745315, 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.