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

[Massimiliano Forner]

Binary package hint: unity

Happened again on the beta version of 11.04. I have simply switched off the Enhanced Zoom Desktop feature of compiz.

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
NonfreeKernelModules: openafs nvidia
Architecture: i386
CheckboxSubmission: 39353571f10042c61cadb5c2e632569c
CheckboxSystem: e704f33cc0866ff0f0256a33de39ea1c
CrashCounter: 1
Date: Fri Apr 1 15:25:28 2011
ExecutablePath: /usr/bin/compiz
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en
 LANG=it_IT.utf8
 LC_MESSAGES=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x32ce3d <_ZNK4sigc11signal_base4implEv+29>: mov 0x4(%edi),%esi
 PC (0x0032ce3d) 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 2011-03-29 (2 days ago)
UserGroups: adm admin cdrom dialout dip fuse lpadmin netdev plugdev sambashare