compiz crashed with SIGSEGV in unity::PlacesStyle::GetDefaultNColumns()

[Richard Appleby]

The desktop hung. I was forced to CTL-ALT-F1 to get a virtual terminal, and force a reboot with "sudo reboot". When the system restarted, I logged in, and found no launcher down the left of the screen; only the desktop background and a partially filled panel at the top of screen (File, Edit, View, Go, Bookmarks, Help" on left (looks like remnants of Firefox menus?) and nothing to the right of the panel.
Attempting ALT-F2 to start an application then produced this crash. Unity now looking pretty hosed :-(

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.16.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Sun Sep 25 22:33:54 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110920.5)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f5ed138f480 <_ZNK5unity11PlacesStyle18GetDefaultNColumnsEv>: mov 0xd0(%rdi),%eax
 PC (0x7f5ed138f480) ok
 source "0xd0(%rdi)" (0x000000d0) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::PlacesStyle::GetDefaultNColumns() const () from /usr/lib/compiz/libunityshell.so
 unity::dash::LensView::UpdateCounts(unity::PlacesGroup*) () from /usr/lib/compiz/libunityshell.so
 unity::dash::LensView::OnResultRemoved(unity::dash::Result const&) () from /usr/lib/compiz/libunityshell.so
 unity::dash::Results::OnRowRemoved(unity::dash::Result&) () from /usr/lib/libunity-core-4.0.so.4
 unity::dash::Model<unity::dash::Result>::OnRowRemoved(_DeeModel*, _DeeModelIter*) () from /usr/lib/libunity-core-4.0.so.4
Title: compiz crashed with SIGSEGV in unity::PlacesStyle::GetDefaultNColumns()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 unity::PlacesStyle::GetDefaultNColumns (this=0x0) at /build/buildd/unity-4.16.0/plugins/unityshell/src/PlacesStyle.cpp:84
 unity::dash::LensView::UpdateCounts (this=0x7f5ec40536a0, group=0x46027e0) at /build/buildd/unity-4.16.0/plugins/unityshell/src/LensView.cpp:196
 unity::dash::LensView::OnResultRemoved (this=0x7f5ec40536a0, result=...) at /build/buildd/unity-4.16.0/plugins/unityshell/src/LensView.cpp:189
 emit (_A_a1=..., impl=<optimized out>) at /usr/include/sigc++-2.0/sigc++/signal.h:1010
 emit (_A_a1=..., this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/signal.h:2781

[Omer Akram (om26er)]

Thanks for taking time to report this bug and helping to make ubuntu better. Its been a while since this bug was reported, there have been alot of changes in Unity since then. Can you please test with Ubuntu 12.04 with all updates installed and let us know if the issue is still there.

[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.]