compiz crashed with SIGSEGV in unity::dash::ResultViewGrid::OnKeyNavFocusChange() from sigc::internal::signal_emit3 from nux::WindowCompositor::SetKeyFocusArea()

[Karl Hegbloom]

I clicked the "Unity" icon on the launcher, then the Applications icon at the bottom. I clicked on "Filter results" then on "Accessibility". I then clicked "Customization" and again on "Accessibility" to unselect it, then when I clicked on "nn more results" nothing happened, but shortly after that, Compiz crashed.

The package name that apport initially gave for this was 'nux', but I think this is a Unity bug since the SEGV happens inside a unity::dash method.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: libnux-2.0-0 2.10.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-8001.1~ppa1-generic-tuxonice 3.2.5
Uname: Linux 3.2.0-8001-generic-tuxonice x86_64
ApportVersion: 2.0.1-0ubuntu4
Architecture: amd64
Date: Tue Apr 17 07:49:23 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110301.7)
ProcCmdline: compiz
ProcCwd: /home/karlheg
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7fe97c0035ce: mov 0x8(%rsi),%rax
 PC (0x7fe97c0035ce) ok
 source "0x8(%rsi)" (0x0000000a) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 ?? () from /usr/lib/compiz/libunityshell.so
 unity::dash::ResultViewGrid::OnKeyNavFocusChange(nux::Area*, bool, nux::KeyNavDirection) () from /usr/lib/compiz/libunityshell.so
 sigc::internal::signal_emit3<void, nux::Area*, bool, nux::KeyNavDirection, sigc::nil>::emit(sigc::internal::signal_impl*, nux::Area* const&, bool const&, nux::KeyNavDirection const&) () from /usr/lib/libnux-2.0.so.0
 nux::WindowCompositor::SetKeyFocusArea(nux::InputArea*, nux::KeyNavDirection) () from /usr/lib/libnux-2.0.so.0
 unity::dash::ResultViewGrid::MouseMove(int, int, int, int, unsigned long, unsigned long) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in unity::dash::ResultViewGrid::OnKeyNavFocusChange()
UpgradeStatus: Upgraded to precise on 2012-01-14 (93 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fprint fuse libvirtd lp lpadmin netdev pkcs11 plugdev sambashare sbuild src tape vboxusers video

[Apport retracing service (apport)]

StacktraceTop:
 check_selection (self=0x37eabc0) at /build/buildd/unity-5.10.0/plugins/unityshell/src/unity-rvgrid-accessible.cpp:163
 ~Result (this=0x7fff4657e780, __in_chrg=<optimized out>) at /build/buildd/unity-5.10.0/UnityCore/Result.h:38
 unity::dash::ResultViewGrid::MouseClick (this=<optimized out>, x=<optimized out>, y=<optimized out>, button_flags=<optimized out>, key_flags=<optimized out>) at /build/buildd/unity-5.10.0/plugins/unityshell/src/ResultViewGrid.cpp:739
 ?? ()

[Walter Garcia-Fontes (walter-garcia)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates.

Have you seen this problem again after this bug report was generated?

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]