compiz crashed with SIGSEGV in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string() from operator() from operator!=<nux::Property, std::basic_string<char>, std::basic_string<char>, std::basic_string<char> > from operator()

[Finn-Bjorn Nymand]

I was trying to figure out why the scale feature didn't show all windows when pressing super+w. I was on an empty workspace, summoned scale for all windows (super+w) and saw the window fading but no window previews appeared. I open CCSM an clicked around to check if the button bindings were set correct, and all of a sudden the system froze and compiz restartet.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu3
Architecture: i386
Date: Sun Apr 15 11:45:58 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120413)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb7696375 <_ZNSsC2ERKSs+21>: mov -0x4(%eax),%edx
 PC (0xb7696375) ok
 source "-0x4(%eax)" (0xfffffffc) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&) () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 ?? () from /usr/lib/compiz/libunityshell.so
 unity::UBusManager::OnCallback(_GVariant*, void*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&) () from /tmp/tmp5YBW6P/usr/lib/i386-linux-gnu/libstdc++.so.6
 operator() (this=<optimized out>) at /usr/include/Nux-2.0/NuxCore/Property-inl.h:87
 operator!=<nux::Property, std::basic_string<char>, std::basic_string<char>, std::basic_string<char> > (rhs=<optimized out>, lhs=<optimized out>) at /usr/include/Nux-2.0/NuxCore/PropertyOperators.h:88
 operator() (data=<optimized out>, this=<optimized out>) at /build/buildd/unity-5.10.0/plugins/unityshell/src/HudLauncherIcon.cpp:61
 operator()<_GVariant* const&> (this=<optimized out>, _A_arg1=<optimized out>) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sparhawk (sparhawkthesecond)]

Compiz crashed like this for me while fiddling around with "Animations" and "Animations Add On".
It was fixed by
$ unity --replace

[Timo Jyrinki (timo-jyrinki)]

Targeting 12.04 but setting otherwise as Incomplete until someone can reproduce the bug also on Ubuntu 12.10.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.