Application that crashed: kontact
Version of the application: 4.3.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-2-686 i686

What I was doing when the application crashed:
I was in the todo view, and wanted to look for a specific group. I have clicked on the search textbox, typed "Uv" - and kontact has crashed.

I am not sure if this pattern matches anything at all, probably the todo I was looking for was deleted - it was not visible, so even if it exists, the filters have hidden it.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  QListData::size (this=0xbff17948, parent=...) at /usr/include/qt4/QtCore/qlist.h:87
#7  QList<KOTodoModel::TodoTreeNode*>::count (this=0xbff17948, parent=...) at /usr/include/qt4/QtCore/qlist.h:250
#8  KOTodoModel::TodoTreeNode::childrenCount (this=0xbff17948, parent=...) at ../../korganizer/views/todoview/kotodomodel.cpp:161
#9  KOTodoModel::rowCount (this=0xbff17948, parent=...) at ../../korganizer/views/todoview/kotodomodel.cpp:648
#10 0xb735b669 in QSortFilterProxyModel::filterAcceptsRow (this=0x8dae398, source_row=0, source_parent=...) at itemviews/qsortfilterproxymodel.cpp:2347
#11 0xaeb2dadd in KOTodoViewSortFilterProxyModel::filterAcceptsRow (this=0x8dae398, source_row=0, source_parent=...) at ../../korganizer/views/todoview/kotodoviewsortfilterproxymodel.cpp:47
#12 0xb73620fb in QSortFilterProxyModelPrivate::handle_filter_changed (this=0x8daeec0, source_to_proxy=..., proxy_to_source=..., source_parent=..., orient=Qt::Vertical)
    at itemviews/qsortfilterproxymodel.cpp:968
#13 0xb73623e3 in QSortFilterProxyModelPrivate::filter_changed (this=0x8daeec0) at itemviews/qsortfilterproxymodel.cpp:952
#14 0xb73629ca in QSortFilterProxyModel::qt_metacall (this=0x8dae398, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbff17bec) at .moc/release-shared/moc_qsortfilterproxymodel.cpp:115
#15 0xaeb2d99a in KOTodoViewSortFilterProxyModel::qt_metacall (this=0x8dae398, _c=QMetaObject::InvokeMetaMethod, _id=21, _a=0xbff17bec) at ./kotodoviewsortfilterproxymodel.moc:62
#16 0xb7762b33 in QMetaObject::activate (sender=0x8daf4a8, from_signal_index=27, to_signal_index=27, argv=0xbff17bec) at kernel/qobject.cpp:3112
#17 0xb7763782 in QMetaObject::activate (sender=0x8daf4a8, m=0xaec2c13c, local_signal_index=0, argv=0xbff17bec) at kernel/qobject.cpp:3186
#18 0xaeb39ef3 in KOTodoViewQuickSearch::searchTextChanged (this=0x8daf4a8, _t1=...) at ./kotodoviewquicksearch.moc:87
#19 0xaeb3a028 in KOTodoViewQuickSearch::qt_metacall (this=0x8daf4a8, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbff17cec) at ./kotodoviewquicksearch.moc:73
#20 0xb7762b33 in QMetaObject::activate (sender=0x8daf790, from_signal_index=27, to_signal_index=27, argv=0xbff17cec) at kernel/qobject.cpp:3112
#21 0xb7763782 in QMetaObject::activate (sender=0x8daf790, m=0xb75eacc8, local_signal_index=0, argv=0xbff17cec) at kernel/qobject.cpp:3186
#22 0xb7197943 in QLineEdit::textChanged (this=0x8daf790, _t1=...) at .moc/release-shared/moc_qlineedit.cpp:228
#23 0xb719cf0a in QLineEditPrivate::finishChange (this=0x8daf7b8, validateFromState=1, update=false, edited=true) at widgets/qlineedit.cpp:2975
#24 0xb719d94b in QLineEdit::insert (this=0x8daf790, newText=...) at widgets/qlineedit.cpp:1408
#25 0xb719f4c7 in QLineEdit::keyPressEvent (this=0x8daf790, event=0xbff1840c) at widgets/qlineedit.cpp:2176
#26 0xb7d29ce4 in KLineEdit::keyPressEvent (this=0x8daf790, e=0xbff1840c) at ../../kdeui/widgets/klineedit.cpp:896
#27 0xb6de363b in QWidget::event (this=0x8daf790, event=0xbff1840c) at kernel/qwidget.cpp:7584
#28 0xb719d335 in QLineEdit::event (this=0x8daf790, e=0xbff1840c) at widgets/qlineedit.cpp:1681
#29 0xb7d2afca in KLineEdit::event (this=0x8daf790, ev=0xbff1840c) at ../../kdeui/widgets/klineedit.cpp:1323
#30 0xb6d8d814 in QApplicationPrivate::notify_helper (this=0x817bd00, receiver=0x8daf790, e=0xbff1840c) at kernel/qapplication.cpp:4056
#31 0xb6d96a1b in QApplication::notify (this=0xbff19ffc, receiver=0x8daf790, e=0xbff1840c) at kernel/qapplication.cpp:3662
#32 0xb7c4e4ad in KApplication::notify (this=0xbff19ffc, receiver=0x8daf790, event=0xbff1840c) at ../../kdeui/kernel/kapplication.cpp:302
#33 0xb774d9cb in QCoreApplication::notifyInternal (this=0xbff19ffc, receiver=0x8daf790, event=0xbff1840c) at kernel/qcoreapplication.cpp:610
#34 0xb6d8e69e in QCoreApplication::sendSpontaneousEvent (receiver=0x8daf790, event=0x0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#35 qt_sendSpontaneousEvent (receiver=0x8daf790, event=0x0) at kernel/qapplication.cpp:4958
#36 0xb6e29e40 in QKeyMapper::sendKeyEvent (keyWidget=0x8daf790, grab=false, type=QEvent::KeyPress, code=86, modifiers=..., text=..., autorepeat=<value optimized out>, count=<value optimized out>, 
    nativeScanCode=55, nativeVirtualKey=118, nativeModifiers=0) at kernel/qkeymapper_x11.cpp:1675
#37 0xb6e2bf14 in QKeyMapperPrivate::translateKeyEvent (this=0x81a1a50, keyWidget=0x8daf790, event=0xbff19c0c, grab=6) at kernel/qkeymapper_x11.cpp:1645
#38 0xb6e02389 in QApplication::x11ProcessEvent (this=0xbff19ffc, event=0xbff19c0c) at kernel/qapplication_x11.cpp:3443
#39 0xb6e2d892 in x11EventSourceDispatch (s=0x81703a8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#40 0xb51a7e98 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#41 0xb51ab623 in ?? () from /lib/libglib-2.0.so.0
#42 0xb51ab7a8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#43 0xb7778858 in QEventDispatcherGlib::processEvents (this=0x81506e8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#44 0xb6e2cfd5 in QGuiEventDispatcherGlib::processEvents (this=0x81506e8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#45 0xb774c01a in QEventLoop::processEvents (this=0xbff19e70, flags=...) at kernel/qeventloop.cpp:149
#46 0xb774c462 in QEventLoop::exec (this=0xbff19e70, flags=...) at kernel/qeventloop.cpp:201
#47 0xb774e8b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0xb6d8d697 in QApplication::exec () at kernel/qapplication.cpp:3525
#49 0x0804bd40 in main (argc=1, argv=0xbff1a1f4) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi