Ubuntu
unity package

compiz crashed with SIGSEGV in ObjectPtr() from unity::launcher::Launcher::DesaturateIcons() from unity::launcher::Launcher::OnOverlayShown()

Bug #953963 reported by Aleksander Jerič on 2012-03-13

This bug affects 9 people

	Status	Importance	Assigned to	Milestone
Unity	Fix Released	High	Unassigned	Unity 7.3.1
5.0	Incomplete	Undecided	Unassigned
unity (Ubuntu)	Fix Released	Medium	Unassigned

Bug Description

In Compiz config settings manager I've just reenabled Unity plugin when crash happened.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.6.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
Date: Tue Mar 13 12:53:34 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120313)
ProcCmdline: compiz
SegvAnalysis:
Segfault happened at: 0x7fda626982e0 <_ZN5unity8launcher8Launcher15DesaturateIconsEv+48>: mov (%rbx),%rax
PC (0x7fda626982e0) ok
source "(%rbx)" (0x00000061) not located in a known VMA region (needed readable region)!
destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
unity::launcher::Launcher::DesaturateIcons() () from /usr/lib/compiz/libunityshell.so
unity::launcher::Launcher::OnOverlayShown(_GVariant*) () from /usr/lib/compiz/libunityshell.so
unity::UBusManager::OnCallback(_GVariant*, void*) () from /usr/lib/compiz/libunityshell.so
?? () from /usr/lib/compiz/libunityshell.so
g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in unity::launcher::Launcher::DesaturateIcons()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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Revision history for this message

Aleksander Jerič (ninjattt) wrote on 2012-03-13:

Dependencies.txt Edit (6.9 KiB, text/plain; charset="utf-8")
Disassembly.txt Edit (1.6 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (230 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (96.0 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (814 bytes, text/plain; charset="utf-8")
Registers.txt Edit (785 bytes, text/plain; charset="utf-8")
Stacktrace.txt Edit (2.1 KiB, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (9.6 KiB, text/plain; charset="utf-8")
XsessionErrors.txt Edit (1.3 KiB, text/plain; charset="utf-8")

Revision history for this message

Apport retracing service (apport) wrote on 2012-03-13:

StacktraceTop:
ObjectPtr (other=<optimized out>, this=0x7fff47279a00) at /usr/include/Nux-2.0/NuxCore/ObjectPtr.h:51
unity::launcher::Launcher::DesaturateIcons (this=<optimized out>) at /build/buildd/unity-5.6.0/plugins/unityshell/src/Launcher.cpp:1273
unity::launcher::Launcher::OnOverlayShown (this=0x13b1a80, data=0x26db590) at /build/buildd/unity-5.6.0/plugins/unityshell/src/Launcher.cpp:1310
operator() (_A_a1=@0x7fff47279a78, this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:515
unity::UBusManager::OnCallback (args=0x26db590, user_data=<optimized out>) at /build/buildd/unity-5.6.0/plugins/unityshell/src/UBusWrapper.cpp:67

Revision history for this message

Apport retracing service (apport) wrote on 2012-03-13: Stacktrace.txt

Stacktrace.txt Edit (6.8 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2012-03-13: ThreadStacktrace.txt

ThreadStacktrace.txt Edit (24.8 KiB, text/plain)

Changed in unity (Ubuntu):
importance:	Undecided → Medium
summary:	- compiz crashed with SIGSEGV in - unity::launcher::Launcher::DesaturateIcons() + compiz crashed with SIGSEGV in ObjectPtr()
tags:	removed: need-amd64-retrace

Revision history for this message

Launchpad Janitor (janitor) wrote on 2012-03-13: Re: compiz crashed with SIGSEGV in ObjectPtr()

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

Changed in unity (Ubuntu):
status:	New → Confirmed

Tim Penhey (thumper) on 2012-03-20

visibility:	private → public
Changed in unity:
status:	New → Triaged
importance:	Undecided → High

Daniel van Vugt (vanvugt) on 2012-04-07

summary:	- compiz crashed with SIGSEGV in ObjectPtr() + compiz crashed with SIGSEGV in ObjectPtr() from + unity::launcher::Launcher::DesaturateIcons() from + unity::launcher::Launcher::OnOverlayShown()
Changed in unity:
milestone:	none → 5.12.0
milestone:	5.12.0 → 5.10.0

Didier Roche-Tolomelli (didrocks) on 2012-04-12

Changed in unity:
milestone:	5.10.0 → 5.12.0

Łukasz Zemczak (sil2100) on 2012-04-12

Changed in unity:
assignee:	nobody → Łukasz Zemczak (sil2100)

Revision history for this message

Łukasz Zemczak (sil2100) wrote on 2012-04-12:

I seem to get different crashes of compiz in different places when enabling/disabling the unity plugin.

Revision history for this message

Łukasz Zemczak (sil2100) wrote on 2012-04-13:

To anyone who could reproduce this problem - do you get the same stacktrace on every crash of the plugin?

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2012-04-13:

Łukasz, all the duplicates seem to suggest the crash happens when toggling plugins in CCSM. Though toggling plugins I'm sure you could trigger some other crashes too.

But it does look like all the duplicates are indeed the same crash. Usually it's due to something being leaked when the unity plugin is closed, and then a callback being called on that leaked object after the plugin was meant to be finished.

Łukasz Zemczak (sil2100) on 2012-04-19

Changed in unity:
assignee:	Łukasz Zemczak (sil2100) → nobody

Revision history for this message

Łukasz Zemczak (sil2100) wrote on 2012-04-19:

I am encountering SIGSEGV crashes, but could not reproduce this particular crash in this particular place. I'll look into why it crashes, but since the reason for it seems to be different, it's not entirely sure if it's the same bug as what I'm encountering (different stack traces and places of crash).

Didier Roche-Tolomelli (didrocks) on 2012-04-27

Changed in unity:
milestone:	5.12.0 → 5.14.0

Revision history for this message

Brandon Schaefer (brandontschaefer) wrote on 2012-07-02:

#10

Has anyone been able to reproduce this? I can't get the unity plugin to crash no matter how many times I toggle it off and on.

Daniel van Vugt (vanvugt) on 2012-07-03

Changed in unity:
milestone:	5.14.0 → 6.2

Didier Roche-Tolomelli (didrocks) on 2012-08-10

Changed in unity:
milestone:	6.2 → 6.4

Daniel van Vugt (vanvugt) on 2012-09-03

Changed in unity:
milestone:	6.4 → 6.6

Daniel van Vugt (vanvugt) on 2012-09-18

Changed in unity:
milestone:	6.6 → 7.0

Stephen M. Webb (bregma) on 2013-04-04

Changed in unity:
milestone:	7.0.0 → 7.0.1

Marco Trevisan (Treviño) (3v1n0) on 2014-07-23

Changed in unity:
milestone:	7.0.1 → 7.3.1

Marco Trevisan (Treviño) (3v1n0) on 2014-11-07

Changed in unity:
status:	Triaged → Fix Released
Changed in unity (Ubuntu):
status:	Confirmed → Fix Released

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compiz crashed with SIGSEGV in ObjectPtr() from unity::launcher::Launcher::DesaturateIcons() from unity::launcher::Launcher::OnOverlayShown()

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