Application: plasma-desktop (0.3)
KDE Platform Version: 4.3.90 (KDE 4.3.90 (KDE 4.4 RC1))
Qt Version: 4.6.0
Operating System: Linux 2.6.31-17-generic x86_64
Distribution: Ubuntu 9.10

-- Information about the crash:
I was running Kubuntu amd64 with KDE 4.3.4 from Backports, and upgraded to 4.4rc1 from the Beta PPA.
When I rebooted I initially didn't have any desktop or panels at all, apperently the dependencies weren't set right so I had to install plasma-desktop and kde-workspace. (doing so installed the correct versions for 4.4rc1: 4.3.90)
When I did and rebooted I found I had an extra panel in addition to my customised ones, so I removed it and got this crash.  The removal did however apply.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7fc39f220750 (LWP 2779))]

Thread 3 (Thread 0x7fc376987910 (LWP 2814)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fc39d70b67b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x35a1b28, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x35a1b28, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007fc39bec73ec in QHostInfoAgent::run (this=0x35a1b10) at kernel/qhostinfo.cpp:252
#4  0x00007fc39d70a6c5 in QThreadPrivate::start (arg=0x35a1b10) at thread/qthread_unix.cpp:244
#5  0x00007fc39d47ba04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007fc39c24680d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc373332910 (LWP 2852)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fc395328556 in ?? () from /usr/lib/libQtWebKit.so.4
#2  0x00007fc395328599 in ?? () from /usr/lib/libQtWebKit.so.4
#3  0x00007fc39d47ba04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#4  0x00007fc39c24680d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()
The current source language is "auto; currently asm".

Thread 1 (Thread 0x7fc39f220750 (LWP 2779)):
[KCrash Handler]
#5  QList (this=0x0) at /usr/include/qt4/QtCore/qlist.h:114
#6  Plasma::Corona::containments (this=0x0) at ../../plasma/corona.cpp:447
#7  0x00007fc39669e165 in Plasma::Extender::item (this=0x3230bf0, name=...) at ../../plasma/extenders/extender.cpp:212
#8  0x00007fc39669e629 in Plasma::Extender::group (this=0x7fff54790510, name=...) at ../../plasma/extenders/extender.cpp:234
#9  0x00007fc3808c9936 in SystemTray::Applet::clearOldNotifications (this=0x3263f00) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:956
#10 0x00007fc3808c9df8 in ~Applet (this=0x3263f00, __in_chrg=<value optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:138
#11 0x00007fc39667875f in qDeleteAll<QList<Plasma::Applet*>::const_iterator> (this=0x3202980, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:322
#12 qDeleteAll<QList<Plasma::Applet*> > (this=0x3202980, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:330
#13 ~ContainmentPrivate (this=0x3202980, __in_chrg=<value optimized out>) at ../../plasma/private/containment_p.h:62
#14 ~Containment (this=0x3202980, __in_chrg=<value optimized out>) at ../../plasma/containment.cpp:142
#15 0x00007fc381394ee9 in ~Panel (this=0x7fff54790510, __in_chrg=<value optimized out>) at ../../../../../plasma/desktop/containments/panel/panel.cpp:126
#16 0x00007fc39d80dd3d in QObject::event (this=0x3202980, e=0x4e461c0) at kernel/qobject.cpp:1243
#17 0x00007fc39cfe203b in QGraphicsWidget::event (this=0x3202980, event=0x4e461c0) at graphicsview/qgraphicswidget.cpp:1362
#18 0x00007fc39c9a3e8c in QApplicationPrivate::notify_helper (this=0x25440a0, receiver=0x3202980, e=0x4e461c0) at kernel/qapplication.cpp:4242
#19 0x00007fc39c9aa48d in QApplication::notify (this=0x252cfb0, receiver=0x3202980, e=0x4e461c0) at kernel/qapplication.cpp:4125
#20 0x00007fc39dd42e16 in KApplication::notify (this=0x252cfb0, receiver=0x3202980, event=0x4e461c0) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x00007fc39d7fe04c in QCoreApplication::notifyInternal (this=0x252cfb0, receiver=0x3202980, event=0x4e461c0) at kernel/qcoreapplication.cpp:704
#22 0x00007fc39d8007c7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x24ac1e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x24ac1e0) at kernel/qcoreapplication.cpp:1345
#24 0x00007fc39d827ae3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#25 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#26 0x00007fc398e43bce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x00007fc398e47598 in ?? () from /lib/libglib-2.0.so.0
#28 0x00007fc398e476c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00007fc39d827623 in QEventDispatcherGlib::processEvents (this=0x2543af0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#30 0x00007fc39ca522fe in QGuiEventDispatcherGlib::processEvents (this=0x7fff54790510, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x00007fc39d7fc972 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#32 0x00007fc39d7fcd4c in QEventLoop::exec (this=0x7fff54791020, flags=) at kernel/qeventloop.cpp:201
#33 0x00007fc39d800a8b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#34 0x00007fc3921848a2 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/desktop/shell/main.cpp:112
#35 0x0000000000406fb8 in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a4a1 "0") at ../../kinit/kinit.cpp:706
#36 0x0000000000407c70 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1198
#37 0x0000000000408121 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1391
#38 0x0000000000408dea in main (argc=4, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1830
The current source language is "auto; currently c".

This bug may be a duplicate of or related to bug 214460.

Possible duplicates by query: bug 219697, bug 214460.

Reported using DrKonqi