Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-11-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I have 1 activity, then zoom out, then open the dialog to add widgets, then i drag analog clock on the activity. it is not visible. then I zoom in and then it crashes. 

 -- Backtrace:
Application: Plasma Workspace (kdeinit), signal: Segmentation fault
[Current thread is 0 (LWP 4212)]

Thread 2 (Thread 0xa92f1b90 (LWP 4217)):
#0  0xb7f94430 in __kernel_vsyscall ()
#1  0xb64650e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66452ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7d989b2 in QWaitCondition::wait (this=0x8d49ff8, mutex=0x8d49ff4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb76d4152 in QHostInfoAgent::run (this=0x8d49fe8) at kernel/qhostinfo.cpp:260
#5  0xb7d9796e in QThreadPrivate::start (arg=0x8d49fe8) at thread/qthread_unix.cpp:189
#6  0xb64614ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb663649e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5f6fa10 (LWP 4212)):
[KCrash Handler]
#6  0xb4ae2862 in PlasmaApp::setControllerVisible (this=0x8762348, show=false) at /build/buildd/kdebase-workspace-4.2.90/plasma/shells/desktop/plasmaapp.cpp:912
#7  0xb4ae34ea in PlasmaApp::zoomIn (this=0x8762348, containment=0x8bc5180) at /build/buildd/kdebase-workspace-4.2.90/plasma/shells/desktop/plasmaapp.cpp:823
#8  0xb4ae3c52 in PlasmaApp::zoom (this=0x8762348, containment=0x8bc5180, direction=Plasma::ZoomIn) at /build/buildd/kdebase-workspace-4.2.90/plasma/shells/desktop/plasmaapp.cpp:788
#9  0xb4ae910a in PlasmaApp::qt_metacall (this=0x8762348, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbfcaff38)
    at /build/buildd/kdebase-workspace-4.2.90/obj-i486-linux-gnu/plasma/shells/desktop/plasmaapp.moc:111
#10 0xb7ea1ca8 in QMetaObject::activate (sender=0x8bc5180, from_signal_index=37, to_signal_index=37, argv=0xbfcaff38) at kernel/qobject.cpp:3069
#11 0xb7ea2932 in QMetaObject::activate (sender=0x8bc5180, m=0xb5e37de8, local_signal_index=2, argv=0xbfcaff38) at kernel/qobject.cpp:3143
#12 0xb5ce97a9 in Plasma::Containment::zoomRequested (this=0x8bc5180, _t1=0x8bc5180, _t2=Plasma::ZoomIn) at /build/buildd/kde4libs-4.2.90/obj-i486-linux-gnu/plasma/containment.moc:170
#13 0xb5ce9ef0 in Plasma::ContainmentPrivate::zoomIn (this=0x8bc1f00) at /build/buildd/kde4libs-4.2.90/plasma/containment.cpp:1656
#14 0xb5cf67e0 in Plasma::Containment::qt_metacall (this=0x8bc5180, _c=QMetaObject::InvokeMetaMethod, _id=23, _a=0xbfcb00ac)
    at /build/buildd/kde4libs-4.2.90/obj-i486-linux-gnu/plasma/containment.moc:141
#15 0xa944f81a in DefaultDesktop::qt_metacall (this=0x8bc5180, _c=QMetaObject::InvokeMetaMethod, _id=58, _a=0xbfcb00ac)
    at /build/buildd/kdebase-workspace-4.2.90/obj-i486-linux-gnu/plasma/containments/desktop/desktop.moc:78
#16 0xb7ea1ca8 in QMetaObject::activate (sender=0x8bc7fb0, from_signal_index=5, to_signal_index=6, argv=0xbfcb00ac) at kernel/qobject.cpp:3069
#17 0xb7ea20e0 in QMetaObject::activate (sender=0x8bc7fb0, m=0xb71a8008, from_local_signal_index=1, to_local_signal_index=2, argv=0xbfcb00ac) at kernel/qobject.cpp:3163
#18 0xb6915891 in QAction::triggered (this=0x8bc7fb0, _t1=false) at .moc/release-shared/moc_qaction.cpp:236
#19 0xb6916e0f in QAction::activate (this=0x8bc7fb0, event=QAction::Trigger) at kernel/qaction.cpp:1160
#20 0xb6919b53 in QAction::qt_metacall (this=0x8bc7fb0, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfcb0248) at kernel/qaction.h:203
#21 0xb697c9fa in QWidgetAction::qt_metacall (this=0x8bc7fb0, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0xbfcb0248) at .moc/release-shared/moc_qwidgetaction.cpp:61
#22 0xb737196a in KAction::qt_metacall (this=0x8bc7fb0, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0xbfcb0248) at /build/buildd/kde4libs-4.2.90/obj-i486-linux-gnu/kdeui/kaction.moc:85
#23 0xb7ea1ca8 in QMetaObject::activate (sender=0x8bc4e60, from_signal_index=6, to_signal_index=6, argv=0x0) at kernel/qobject.cpp:3069
#24 0xb7ea2932 in QMetaObject::activate (sender=0x8bc4e60, m=0xb5e3aed0, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3143
#25 0xb5d706c7 in Plasma::IconWidget::clicked (this=0x8bc4e60) at /build/buildd/kde4libs-4.2.90/obj-i486-linux-gnu/plasma/iconwidget.moc:182
#26 0xb5d72030 in Plasma::IconWidget::mouseReleaseEvent (this=0x8bc4e60, event=0xbfcb0944) at /build/buildd/kde4libs-4.2.90/plasma/widgets/iconwidget.cpp:1172
#27 0xb6f51c54 in QGraphicsItem::sceneEvent (this=0x8bc4e68, event=0xbfcb0944) at graphicsview/qgraphicsitem.cpp:4792
#28 0xb6f9ef9f in QGraphicsWidget::sceneEvent (this=0x8bc4e60, event=0xbfcb0944) at graphicsview/qgraphicswidget.cpp:1089
#29 0xb6f761cc in QGraphicsScenePrivate::sendEvent (this=0x882d620, item=0x8bc4e68, event=0xbfcb0944) at graphicsview/qgraphicsscene.cpp:1150
#30 0xb6f77412 in QGraphicsScenePrivate::sendMouseEvent (this=0x882d620, mouseEvent=0xbfcb0944) at graphicsview/qgraphicsscene.cpp:1221
#31 0xb6f7f1c1 in QGraphicsScene::mouseReleaseEvent (this=0x8841d78, mouseEvent=0xbfcb0944) at graphicsview/qgraphicsscene.cpp:4298
#32 0xb6f7f54a in QGraphicsScene::event (this=0x8841d78, event=0xbfcb0944) at graphicsview/qgraphicsscene.cpp:3661
#33 0xb691be9c in QApplicationPrivate::notify_helper (this=0x8792fc8, receiver=0x8841d78, e=0xbfcb0944) at kernel/qapplication.cpp:4084
#34 0xb692419e in QApplication::notify (this=0x8762348, receiver=0x8841d78, e=0xbfcb0944) at kernel/qapplication.cpp:3631
#35 0xb7455e8d in KApplication::notify (this=0x8762348, receiver=0x8841d78, event=0xbfcb0944) at /build/buildd/kde4libs-4.2.90/kdeui/kernel/kapplication.cpp:302
#36 0xb7e8ba3b in QCoreApplication::notifyInternal (this=0x8762348, receiver=0x8841d78, event=0xbfcb0944) at kernel/qcoreapplication.cpp:602
#37 0xb6f947c2 in QGraphicsView::mouseReleaseEvent (this=0x8fe8cb8, event=0xbfcb0f48) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#38 0xb6972b43 in QWidget::event (this=0x8fe8cb8, event=0xbfcb0f48) at kernel/qwidget.cpp:7516
#39 0xb6d4c993 in QFrame::event (this=0x8fe8cb8, e=0xbfcb0f48) at widgets/qframe.cpp:559
#40 0xb6dec94f in QAbstractScrollArea::viewportEvent (this=0x8fe8cb8, e=0x8abce100) at widgets/qabstractscrollarea.cpp:962
#41 0xb6f90102 in QGraphicsView::viewportEvent (this=0x8fe8cb8, event=0xbfcb0f48) at graphicsview/qgraphicsview.cpp:2933
#42 0xb6deef55 in QAbstractScrollAreaFilter::eventFilter (this=0x8ffa788, o=0x8ff9f50, e=0xbfcb0f48) at widgets/qabstractscrollarea_p.h:100
#43 0xb7e8ac5a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x8792fc8, receiver=0x8ff9f50, event=0xbfcb0f48) at kernel/qcoreapplication.cpp:718
#44 0xb691be7a in QApplicationPrivate::notify_helper (this=0x8792fc8, receiver=0x8ff9f50, e=0xbfcb0f48) at kernel/qapplication.cpp:4080
#45 0xb6924b11 in QApplication::notify (this=0x8762348, receiver=0x8ff9f50, e=0xbfcb0f48) at kernel/qapplication.cpp:3786
#46 0xb7455e8d in KApplication::notify (this=0x8762348, receiver=0x8ff9f50, event=0xbfcb0f48) at /build/buildd/kde4libs-4.2.90/kdeui/kernel/kapplication.cpp:302
#47 0xb7e8ba3b in QCoreApplication::notifyInternal (this=0x8762348, receiver=0x8ff9f50, event=0xbfcb0f48) at kernel/qcoreapplication.cpp:602
#48 0xb6923b7e in QApplicationPrivate::sendMouseEvent (receiver=0x8ff9f50, event=0xbfcb0f48, alienWidget=0x8ff9f50, nativeWidget=0x8fe8cb8, buttonDown=0xb71c6200, lastMouseReceiver=@0xb71c6204)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#49 0xb699397e in QETWidget::translateMouseEvent (this=0x8fe8cb8, event=0xbfcb158c) at kernel/qapplication_x11.cpp:4425
#50 0xb6992ca7 in QApplication::x11ProcessEvent (this=0x8762348, event=0xbfcb158c) at kernel/qapplication_x11.cpp:3421
#51 0xb69bdc6a in x11EventSourceDispatch (s=0x8795d00, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#52 0xb64aeb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#53 0xb64b20eb in ?? () from /usr/lib/libglib-2.0.so.0
#54 0xb64b2268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#55 0xb7eb7438 in QEventDispatcherGlib::processEvents (this=0x8792228, flags={i = -1077209272}) at kernel/qeventdispatcher_glib.cpp:323
#56 0xb69bd365 in QGuiEventDispatcherGlib::processEvents (this=0x8792228, flags={i = -1077209224}) at kernel/qguieventdispatcher_glib.cpp:202
#57 0xb7e8a06a in QEventLoop::processEvents (this=0xbfcb17f0, flags={i = -1077209160}) at kernel/qeventloop.cpp:149
#58 0xb7e8a4aa in QEventLoop::exec (this=0xbfcb17f0, flags={i = -1077209096}) at kernel/qeventloop.cpp:200
#59 0xb7e8c959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#60 0xb691bd17 in QApplication::exec () at kernel/qapplication.cpp:3553
#61 0xb4acd820 in kdemain (argc=1, argv=0x877a880) at /build/buildd/kdebase-workspace-4.2.90/plasma/shells/desktop/main.cpp:50
#62 0x0804e1c0 in launch (argc=1, _name=0x8779d74 "/usr/bin/plasma-desktop", args=0x8779d8c "", cwd=0x0, envc=0, envs=0x8779d90 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80512d0 "0") at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:671
#63 0x0804e99d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1163
#64 0x0804ef25 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1356
#65 0x0804fb0a in main (argc=2, argv=0xbfcb1fe4, envp=0xbfcb1ff0) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1783

This bug may be a duplicate of or related to bug 195739

Reported using DrKonqi