compiz crashed with SIGSEGV in LauncherIcon::OpenQuicklist()

[Paul]

Binary package hint: unity

1104 alpha 3, file manager hangs, usually it works the first time and then it hangs on all subsequent tries. Only fix is a restart and then the process repeats. It work fine in alpha 2, I cant pin down what update cause it to occur in alpha 3.

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
NonfreeKernelModules: nvidia
Architecture: amd64
CrashCounter: 1
Date: Tue Mar 8 14:59:09 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110302)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_CA:en
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f7a757d0b53 <_ZN12LauncherIcon13OpenQuicklistEb+19>: mov 0x168(%rdi),%rdi
 PC (0x7f7a757d0b53) 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: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 LauncherIcon::OpenQuicklist (this=0x0, default_to_first_item=false) at /build/buildd/unity-3.6.2/src/LauncherIcon.cpp:382
 Launcher::SingleFingerHoldTimeout (data=0x1f3b610) at /build/buildd/unity-3.6.2/src/Launcher.cpp:1498
 g_timeout_dispatch (source=0x196d230, callback=<value optimized out>, user_data=<value optimized out>) at /build/buildd/glib2.0-2.28.2/./glib/gmain.c:3882
 g_main_dispatch (context=0x197cf30) at /build/buildd/glib2.0-2.28.2/./glib/gmain.c:2440
 g_main_context_dispatch (context=0x197cf30) at /build/buildd/glib2.0-2.28.2/./glib/gmain.c:3013

[Jeff Lane  (bladernr)]

I can reliably recreate this using today's latest updates (9 march) simply by clicking on a dock icon, dragging it out and down then releasing it.

https://bugs.launchpad.net/ubuntu/+source/unity/+bug/732357

[Marco Biscaro (marcobiscaro2112)]

The same here. This is happening because after the single hold timeout (1 second), the quicklist tries to open. But the Launcher is getting the icon by the mouse position. When we do a drag and drop to outside the launcher, there is no icon on the mouse position.

[Omer Akram (om26er)]

the issue is known and there is a fix in bug 731096 which hopefully will be included in today's update.