compiz crashed with SIGSEGV in empty() from check_selection() [unity-rvgrid-accessible.cpp:171]

[Tim]

on update today

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.6.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
Date: Thu Mar 22 14:41:58 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120201)
ProcCmdline: compiz
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
Title: compiz crashed with SIGSEGV in g_main_context_dispatch()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 empty (this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot_base.h:273
 operator() (this=0x6ea3070) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:439
 operator std::basic_string<char> (this=0x6ea3058) at /usr/include/Nux-2.0/NuxCore/Property-inl.h:142
 check_selection (self=0x7fe9d402fd80) at /build/buildd/unity-5.6.0/plugins/unityshell/src/unity-rvgrid-accessible.cpp:171
 check_selection_on_idle (data=0x7fe9d402fd80) at /build/buildd/unity-5.6.0/plugins/unityshell/src/unity-rvgrid-accessible.cpp:234

[Launchpad Janitor (janitor)]

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

[jhfhlkjlj (fdsuufijjejejejej-deactivatedaccount)]

Indeed, this appears to have been introduced to an update a while ago as I've had frequent instances of crashing since the last batch of compiz/unity updates.

If it helps any, I've moved on to Unity in -proposed (5.16.0-0ubuntu1) and the issue still remains.

[Didier Roche-Tolomelli (didrocks)]

Putting back on the 6 series, still a popular crash for quantal.

[jhfhlkjlj (fdsuufijjejejejej-deactivatedaccount)]

Hate to be a bother but does the move to the 7 series mean that this fix won't be backported to precise? would be a shame as it's a rather frequent crash.

[Daniel van Vugt (vanvugt)]

It wasn't meant to "move". I've added the 5 series back in for precise. All affected series should be shown for accuracy even if some of them don't get fixes.

[Apport retracing service (apport)]

Package: unity 5.18.0-0ubuntu2
ProcCmdline: compiz

[christopherbalz (christophermbalz)]

On Unity, this problem affects users who also use Mac a lot: By accidentally pressing the Meta system key with a modifier key under certain unknown conditions, it is possible to confuse the Unity Lens such that this issue is triggered.

[Frank Bicknell (fbicknel)]

@christopherbalz: it's nice to know that: I'll try to pay more attention when using the meta key. (But I'm not a Mac user: I just [over] use the meta key a lot. :) )

[Andrea Azzarone (azzar1)]

Should be fixed in most recent unity releases.