Application that crashed: kontact
Version of the application: 4.3.0 rc2
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
This is likely a dupe of Bug #199907, which I was trying to reproduce when this crash occured. I am filing it separately as I do not know if it is the same cause. Please chech the backtrace. Thanks.

Note that this crash was caused INSIDE Kontact, on Dario's request I will try to reproduce in standalone Korganizer.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb72e54fb in KCal::CalendarLocal::close (this=0xa27e464) at /usr/include/qt4/QtCore/qalgorithms.h:350
#7  0xb0e93f91 in ?? () from /usr/lib/kde4/kcal_akonadi.so
#8  0xb0eaf6df in ?? () from /usr/lib/kde4/kcal_akonadi.so
#9  0xb0e918a6 in ?? () from /usr/lib/kde4/kcal_akonadi.so
#10 0xb732ff7f in KCal::ResourceCalendar::load (this=0xa27e058) at /build/buildd/kdepimlibs-4.2.96/kcal/resourcecalendar.cpp:168
#11 0xb1161013 in ResourceItem::stateChange (this=0xab5ec40, active=true) at /build/buildd/kdepim-4.2.96/korganizer/resourceview.cpp:200
#12 0xb116110d in ResourceView::slotItemClicked (this=0xa8aa008, i=0xab5ec40) at /build/buildd/kdepim-4.2.96/korganizer/resourceview.cpp:817
#13 0xb1165455 in ResourceView::qt_metacall (this=0xa8aa008, _c=QMetaObject::InvokeMetaMethod, _id=19, _a=0xbfbc1f18) at /build/buildd/kdepim-4.2.96/obj-i486-linux-gnu/korganizer/resourceview.moc:121
#14 0xb5be6ca8 in QMetaObject::activate (sender=0xa28fc00, from_signal_index=96, to_signal_index=96, argv=0xbfbc1f18) at kernel/qobject.cpp:3069
#15 0xb5be7932 in QMetaObject::activate (sender=0xa28fc00, m=0xb694aad0, local_signal_index=1, argv=0xbfbc1f18) at kernel/qobject.cpp:3143
#16 0xb66a1eb9 in QTreeWidget::itemClicked (this=0xa28fc00, _t1=0xab5ec40, _t2=0) at .moc/release-shared/moc_qtreewidget.cpp:201
#17 0xb66a5d75 in QTreeWidgetPrivate::_q_emitItemClicked (this=0xa8aa3b8, index=@0xb0ff960) at itemviews/qtreewidget.cpp:2226
#18 0xb66af491 in QTreeWidget::qt_metacall (this=0xa28fc00, _c=QMetaObject::InvokeMetaMethod, _id=16, _a=0xbfbc204c) at .moc/release-shared/moc_qtreewidget.cpp:144
#19 0xb5be6ca8 in QMetaObject::activate (sender=0xa28fc00, from_signal_index=32, to_signal_index=32, argv=0xbfbc204c) at kernel/qobject.cpp:3069
#20 0xb5be7932 in QMetaObject::activate (sender=0xa28fc00, m=0xb6949a24, local_signal_index=1, argv=0xbfbc204c) at kernel/qobject.cpp:3143
#21 0xb66241b3 in QAbstractItemView::clicked (this=0xa28fc00, _t1=@0xb0ff960) at .moc/release-shared/moc_qabstractitemview.cpp:321
#22 0xb66317b5 in QAbstractItemView::mouseReleaseEvent (this=0xa28fc00, event=0xbfbc2968) at itemviews/qabstractitemview.cpp:1655
#23 0xb667478c in QTreeView::mouseReleaseEvent (this=0xa28fc00, event=0xbfbc2968) at itemviews/qtreeview.cpp:1787
#24 0xb6108b43 in QWidget::event (this=0xa28fc00, event=0xbfbc2968) at kernel/qwidget.cpp:7516
#25 0xb64e2993 in QFrame::event (this=0xa28fc00, e=0xbfbc2968) at widgets/qframe.cpp:559
#26 0xb658294f in QAbstractScrollArea::viewportEvent (this=0xa28fc00, e=0xa1911f0) at widgets/qabstractscrollarea.cpp:962
#27 0xb6634647 in QAbstractItemView::viewportEvent (this=0xa28fc00, event=0xbfbc2968) at itemviews/qabstractitemview.cpp:1466
#28 0xb666f0c4 in QTreeView::viewportEvent (this=0xa28fc00, event=0xbfbc2968) at itemviews/qtreeview.cpp:1257
#29 0xb6584f55 in QAbstractScrollAreaFilter::eventFilter (this=0xa8e7d88, o=0xa27de08, e=0xbfbc2968) at widgets/qabstractscrollarea_p.h:100
#30 0xb5bcfc5a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x9cd49e0, receiver=0xa27de08, event=0xbfbc2968) at kernel/qcoreapplication.cpp:718
#31 0xb60b1e7a in QApplicationPrivate::notify_helper (this=0x9cd49e0, receiver=0xa27de08, e=0xbfbc2968) at kernel/qapplication.cpp:4080
#32 0xb60bab11 in QApplication::notify (this=0xbfbc3298, receiver=0xa27de08, e=0xbfbc2968) at kernel/qapplication.cpp:3786
#33 0xb6cd84dd in KApplication::notify (this=0xbfbc3298, receiver=0xa27de08, event=0xbfbc2968) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#34 0xb5bd0a3b in QCoreApplication::notifyInternal (this=0xbfbc3298, receiver=0xa27de08, event=0xbfbc2968) at kernel/qcoreapplication.cpp:602
#35 0xb60b9b7e in QApplicationPrivate::sendMouseEvent (receiver=0xa27de08, event=0xbfbc2968, alienWidget=0xa27de08, nativeWidget=0x9cdd3a0, buttonDown=0xb695c200, lastMouseReceiver=@0xb695c204)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#36 0xb612997e in QETWidget::translateMouseEvent (this=0x9cdd3a0, event=0xbfbc2fac) at kernel/qapplication_x11.cpp:4425
#37 0xb6128ca7 in QApplication::x11ProcessEvent (this=0xbfbc3298, event=0xbfbc2fac) at kernel/qapplication_x11.cpp:3421
#38 0xb6153c6a in x11EventSourceDispatch (s=0x9cd0868, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#39 0xb4c95b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#40 0xb4c990eb in ?? () from /usr/lib/libglib-2.0.so.0
#41 0xb4c99268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#42 0xb5bfc438 in QEventDispatcherGlib::processEvents (this=0x9cd6f98, flags={i = -1078185624}) at kernel/qeventdispatcher_glib.cpp:323
#43 0xb6153365 in QGuiEventDispatcherGlib::processEvents (this=0x9cd6f98, flags={i = -1078185576}) at kernel/qguieventdispatcher_glib.cpp:202
#44 0xb5bcf06a in QEventLoop::processEvents (this=0xbfbc3210, flags={i = -1078185512}) at kernel/qeventloop.cpp:149
#45 0xb5bcf4aa in QEventLoop::exec (this=0xbfbc3210, flags={i = -1078185448}) at kernel/qeventloop.cpp:200
#46 0xb5bd1959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#47 0xb60b1d17 in QApplication::exec () at kernel/qapplication.cpp:3553
#48 0x0804bfef in main (argc=1, argv=0xbfbc3594) at /build/buildd/kdepim-4.2.96/kontact/src/main.cpp:218

Reported using DrKonqi