Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I found that my panel had been unclickable (none of the widgets would register left-clicks), so I right-clicked and created a new default panel through the menu, then right-clicked on and deleted the original.

- Unusual behavior I noticed:
Unclickable panel widgets.

- Other potentially relevant information:
I installed plasma through apt on top of Ubuntu 11.10 (Gnome) after an upgrade from 11.10 upgraded from 10.10.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe215b8f7c0 (LWP 27267))]

Thread 2 (Thread 0x7fe1f6894700 (LWP 27268)):
#0  0x00007fe215478773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe209a03f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe209a04429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe21266af3e in QEventDispatcherGlib::processEvents (this=0x7fe1f00008d0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fe21263ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fe21263eef7 in QEventLoop::exec (this=0x7fe1f6893cd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fe21255627f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fe212621cbf in QInotifyFileSystemWatcherEngine::run (this=0x231b500) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fe212558d05 in QThreadPrivate::start (arg=0x231b500) at thread/qthread_unix.cpp:331
#9  0x00007fe206d1d56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007fe20a510efc in start_thread (arg=0x7fe1f6894700) at pthread_create.c:304
#11 0x00007fe21548489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe215b8f7c0 (LWP 27267)):
[KCrash Handler]
#6  QGraphicsLayoutItem::setParentLayoutItem (this=0x2e51cb0, parent=0x0) at graphicsview/qgraphicslayoutitem.cpp:856
#7  0x00007fe1fa570cdf in SystemTray::CompactLayout::removeItem (this=0x1f448d0, item=0x2e51cb0) at ../../../../../plasma/generic/applets/systemtray/ui/compactlayout.cpp:127
#8  0x00007fe1fa574bc7 in SystemTray::TaskArea::addWidgetForTask (this=0x1f44b20, task=0x2c9d8e0) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:280
#9  0x00007fe1fa575926 in SystemTray::TaskArea::addTask (this=0x1f44b20, task=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#10 0x00007fe1fa576124 in SystemTray::TaskArea::qt_metacall (this=0x1f44b20, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff391df810) at ./taskarea.moc:89
#11 0x00007fe212652eba in QMetaObject::activate (sender=0x1b2cf40, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff391df810) at kernel/qobject.cpp:3278
#12 0x00007fe1fa5588c2 in SystemTray::Manager::taskChanged (this=<optimized out>, _t1=0x2c9d8e0) at ./manager.moc:106
#13 0x00007fe1fa558c24 in SystemTray::Manager::qt_metacall (this=0x1b2cf40, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff391df920) at ./manager.moc:84
#14 0x00007fe212652eba in QMetaObject::activate (sender=0x2c9d8e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff391df920) at kernel/qobject.cpp:3278
#15 0x00007fe1fa55945f in SystemTray::Task::changed (this=<optimized out>, _t1=0x2c9d8e0) at ./task.moc:112
#16 0x00007fe1fa559731 in SystemTray::Task::widgetDeleted (this=0x2c9d8e0) at ../../../../../plasma/generic/applets/systemtray/core/task.cpp:129
#17 0x00007fe1fa5599f4 in SystemTray::Task::qt_metacall (this=0x2c9d8e0, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff391dfab0) at ./task.moc:100
#18 0x00007fe1fa55a430 in SystemTray::FdoTask::qt_metacall (this=0x2c9d8e0, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff391dfab0) at ./fdotask.moc:67
#19 0x00007fe212652eba in QMetaObject::activate (sender=0x2e51c90, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff391dfab0) at kernel/qobject.cpp:3278
#20 0x00007fe21265336f in QObject::destroyed (this=<optimized out>, _t1=0x2e51c90) at .moc/release-shared/moc_qobject.cpp:149
#21 0x00007fe212656ef7 in QObject::~QObject (this=0x2e51c90, __in_chrg=<optimized out>) at kernel/qobject.cpp:843
#22 0x00007fe212012548 in ~QGraphicsObject (this=0x2e51c90, __in_chrg=<optimized out>) at ../../include/QtGui/../../src/gui/graphicsview/qgraphicsitem.h:547
#23 QGraphicsWidget::~QGraphicsWidget (this=0x2e51c90, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#24 0x00007fe1fa55a709 in SystemTray::FdoGraphicsWidget::~FdoGraphicsWidget (this=0x2e51c90, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/protocols/fdo/fdographicswidget.cpp:77
#25 0x00007fe211fc2dc6 in QGraphicsItem::~QGraphicsItem (this=0x1b37020, __in_chrg=<optimized out>) at graphicsview/qgraphicsitem.cpp:1488
#26 0x00007fe212012540 in ~QGraphicsObject (this=0x1b37010, __in_chrg=<optimized out>) at ../../include/QtGui/../../src/gui/graphicsview/qgraphicsitem.h:547
#27 QGraphicsWidget::~QGraphicsWidget (this=0x1b37010, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#28 0x00007fe1fa573439 in SystemTray::TaskArea::~TaskArea (this=0x1b37010, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:147
#29 0x00007fe1fa56bb4d in SystemTray::Applet::~Applet (this=0x1b29ff0, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:145
#30 0x00007fe1fa56bd59 in SystemTray::Applet::~Applet (this=0x1b29ff0, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:163
#31 0x00007fe214f925ef in qDeleteAll<QList<Plasma::Applet*>::const_iterator> (end=<optimized out>, begin=<optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:322
#32 qDeleteAll<QList<Plasma::Applet*> > (c=...) at /usr/include/qt4/QtCore/qalgorithms.h:330
#33 ~ContainmentPrivate (this=0x1998b80, __in_chrg=<optimized out>) at ../../plasma/private/containment_p.h:70
#34 Plasma::Containment::~Containment (this=0x1971eb0, __in_chrg=<optimized out>) at ../../plasma/containment.cpp:148
#35 0x00007fe1fb900b39 in Panel::~Panel (this=0x1971eb0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/containments/panel/panel.cpp:129
#36 0x00007fe212656a88 in QObject::event (this=0x1971eb0, e=<optimized out>) at kernel/qobject.cpp:1200
#37 0x00007fe21200e89b in QGraphicsWidget::event (this=0x1971eb0, event=0x2b08ae0) at graphicsview/qgraphicswidget.cpp:1455
#38 0x00007fe2119f0424 in notify_helper (e=0x2b08ae0, receiver=0x1971eb0, this=0x17b0930) at kernel/qapplication.cpp:4486
#39 QApplicationPrivate::notify_helper (this=0x17b0930, receiver=0x1971eb0, e=0x2b08ae0) at kernel/qapplication.cpp:4458
#40 0x00007fe2119f5291 in QApplication::notify (this=0x1795fe0, receiver=0x1971eb0, e=0x2b08ae0) at kernel/qapplication.cpp:4365
#41 0x00007fe2132ee126 in KApplication::notify (this=0x1795fe0, receiver=0x1971eb0, event=0x2b08ae0) at ../../kdeui/kernel/kapplication.cpp:311
#42 0x00007fe21263fafc in QCoreApplication::notifyInternal (this=0x1795fe0, receiver=0x1971eb0, event=0x2b08ae0) at kernel/qcoreapplication.cpp:787
#43 0x00007fe21264351f in sendEvent (event=0x2b08ae0, receiver=0x1971eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#44 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x16f3430) at kernel/qcoreapplication.cpp:1428
#45 0x00007fe21266aa73 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#46 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:277
#47 0x00007fe209a03a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007fe209a04258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#49 0x00007fe209a04429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#50 0x00007fe21266aed6 in QEventDispatcherGlib::processEvents (this=0x16f4f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#51 0x00007fe211a9807e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#52 0x00007fe21263ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#53 0x00007fe21263eef7 in QEventLoop::exec (this=0x7fff391e0580, flags=...) at kernel/qeventloop.cpp:201
#54 0x00007fe212643789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#55 0x00007fe2157831a3 in kdemain (argc=1, argv=0x7fff391e0968) at ../../../../plasma/desktop/shell/main.cpp:120
#56 0x00007fe2153c430d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff391e0968, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff391e0958) at libc-start.c:226
#57 0x0000000000400671 in _start ()

Possible duplicates by query: bug 286296, bug 285763, bug 285590, bug 283937, bug 282269.

Reported using DrKonqi