compiz crashed with SIGSEGV in LauncherIcon::OpenQuicklist()

[Jeff Lane ]

Binary package hint: unity

This happened after installing the latest natty updates and rebooting. As soon as I was logged in, I tried click-dragging an icon in the dock to reorganize them. Then the dock and panel disappeared and apport started firing.

This also seems to have eaten up my keyboard as well (at least within the GUI). Apport opened up Firefox which opened with no border or title bar or any sort of navigation bar at all. I was unable to actually type in the text box for the bug report, so I had to do this from a different machine.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.6.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Wed Mar 9 19:31:33 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.04.2 LTS "Lucid Lynx" - Release amd64 (20110211.1)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f5ff1e47b53 <_ZN12LauncherIcon13OpenQuicklistEb+19>: mov 0x168(%rdi),%rdi
 PC (0x7f5ff1e47b53) ok
 source "0x168(%rdi)" (0x00000168) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 LauncherIcon::OpenQuicklist(bool) () from /usr/lib/compiz/libunityshell.so
 Launcher::SingleFingerHoldTimeout(void*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/libglib-2.0.so.0
 ?? () from /lib/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in LauncherIcon::OpenQuicklist()
UpgradeStatus: Upgraded to natty on 2011-03-07 (2 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Jeff Lane  (bladernr)]

I can very reliably recreate this on a Thinkpad x201. As soon as I'm logged in, simply grabbing an icon in the dock and dragging it out and down and releasing it causes comiz/unity to crash.

[Jeff Lane  (bladernr)]

Also, for kicks I ran /usr/lib/unity/autopilot.py and that successfully passed. but as soon as I tried dragging icons manually (recreating the steps autopilot.py performs manually), compiz/unity crashed.

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #731726, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.