Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-gentoo-r5 x86_64

What I was doing when the application crashed:
Kontact crashed when adding a calendar entry. 

The calendar is in a "remote file", at a sftp:// url.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  QBasicAtomicInt::ref (this=0x2474b80) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121
#6  QString (this=0x2474b80) at /usr/include/qt4/QtCore/qstring.h:712
#7  KCal::IncidenceBase::uid (this=0x2474b80) at /var/tmp/portage/kde-base/kdepimlibs-4.3.4/work/kdepimlibs-4.3.4/kcal/incidencebase.cpp:185
#8  0x00007ff89330856c in KOEventViewer::changeIncidenceDisplay (this=0x2355fc0, incidence=0x24d1890, action=0)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4/korganizer/koeventviewer.cpp:136
#9  0x00007ff893d05967 in CalendarView::incidenceAdded (this=0x24c4870, incidence=0x24d1890) at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4/korganizer/calendarview.cpp:659
#10 0x00007ff893d0aa90 in CalendarView::qt_metacall (this=0x24c4870, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff98c5e560)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4_build/korganizer/calendarview.moc:484
#11 0x00007ff8b090d826 in QMetaObject::activate (sender=0x29ae860, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3101
#12 0x00007ff8937832df in KOrg::IncidenceChangerBase::incidenceAdded (this=0x7fff98c5e250, _t1=0x24d1890)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4_build/korganizer/interfaces/korganizer/incidencechangerbase.moc:94
#13 0x00007ff893d8ce0d in IncidenceChanger::addIncidence (this=0x29ae860, incidence=0x24d1890, parent=0x30cc350)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4/korganizer/incidencechanger.cpp:334
#14 0x00007ff893d174b7 in KOEventEditor::processInput (this=0x30cc350) at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4/korganizer/koeventeditor.cpp:346
#15 0x00007ff893d1440f in KOIncidenceEditor::slotButtonClicked (this=0x30cc350, button=<value optimized out>)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4/korganizer/koincidenceeditor.cpp:102
#16 0x00007ff8b23cc6a5 in KDialog::qt_metacall (this=0x30cc350, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff98c5eb00)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kdeui/kdialog.moc:184
#17 0x00007ff8b24814d6 in KPageDialog::qt_metacall (this=0x7fff98c5e250, _c=38226816, _id=0, _a=0x0) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kdeui/kpagedialog.moc:64
#18 0x00007ff893d14bb5 in KOIncidenceEditor::qt_metacall (this=0x7fff98c5e250, _c=38226816, _id=0, _a=0x0)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4_build/korganizer/koincidenceeditor.moc:107
#19 0x00007ff893d17996 in KOEventEditor::qt_metacall (this=0x7fff98c5e250, _c=38226816, _id=0, _a=0x0)
    at /var/tmp/portage/kde-base/korganizer-4.3.4/work/korganizer-4.3.4_build/korganizer/koeventeditor.moc:71
#20 0x00007ff8b090d826 in QMetaObject::activate (sender=0x2ba6088, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3101
#21 0x00007ff8b091190e in QSignalMapper::mapped (this=0x7fff98c5e250, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#22 0x00007ff8b09119b0 in QSignalMapper::map (this=0x2ba6088, sender=0x25fae50) at kernel/qsignalmapper.cpp:266
#23 0x00007ff8b0912b90 in QSignalMapper::qt_metacall (this=0x2ba6088, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff98c5ec90) at .moc/release-shared/moc_qsignalmapper.cpp:81
#24 0x00007ff8b090d826 in QMetaObject::activate (sender=0x25fae50, from_signal_index=<value optimized out>, to_signal_index=30, argv=0x0) at kernel/qobject.cpp:3101
#25 0x00007ff8b1c44007 in QAbstractButton::clicked (this=0x7fff98c5e250, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#26 0x00007ff8b19dfc8b in QAbstractButtonPrivate::emitClicked (this=0x2d07b80) at widgets/qabstractbutton.cpp:543
#27 0x00007ff8b19e0afb in QAbstractButtonPrivate::click (this=0x2d07b80) at widgets/qabstractbutton.cpp:536
#28 0x00007ff8b19e0d35 in QAbstractButton::mouseReleaseEvent (this=0x25fae50, e=0x7fff98c5f5e0) at widgets/qabstractbutton.cpp:1115
#29 0x00007ff8b170a4a8 in QWidget::event (this=0x25fae50, event=0x7fff98c5f5e0) at kernel/qwidget.cpp:7554
#30 0x00007ff8b16bd8fd in QApplicationPrivate::notify_helper (this=0x106d220, receiver=0x25fae50, e=0x7fff98c5f5e0) at kernel/qapplication.cpp:4065
#31 0x00007ff8b16c590b in QApplication::notify (this=<value optimized out>, receiver=0x25fae50, e=0x7fff98c5f5e0) at kernel/qapplication.cpp:3767
#32 0x00007ff8b2455fdb in KApplication::notify (this=0x7fff98c614a0, receiver=0x25fae50, event=0x7fff98c5f5e0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:302
#33 0x00007ff8b08fba5b in QCoreApplication::notifyInternal (this=0x7fff98c614a0, receiver=0x25fae50, event=0x7fff98c5f5e0) at kernel/qcoreapplication.cpp:606
#34 0x00007ff8b16c6df8 in QCoreApplication::sendSpontaneousEvent (receiver=0x25fae50, event=0x7fff98c5f5e0, alienWidget=0x25fae50, nativeWidget=0x30cc350, buttonDown=<value optimized out>, 
    lastMouseReceiver=...) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#35 QApplicationPrivate::sendMouseEvent (receiver=0x25fae50, event=0x7fff98c5f5e0, alienWidget=0x25fae50, nativeWidget=0x30cc350, buttonDown=<value optimized out>, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#36 0x00007ff8b171fc1c in QETWidget::translateMouseEvent (this=0x30cc350, event=<value optimized out>) at kernel/qapplication_x11.cpp:4411
#37 0x00007ff8b171e7b6 in QApplication::x11ProcessEvent (this=0x7fff98c614a0, event=0x7fff98c60fd0) at kernel/qapplication_x11.cpp:3552
#38 0x00007ff8b1742fdc in x11EventSourceDispatch (s=0x1070ba0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#39 0x00007ff8abcb84a9 in g_main_dispatch (context=0x1070920) at gmain.c:1824
#40 IA__g_main_context_dispatch (context=0x1070920) at gmain.c:2377
#41 0x00007ff8abcbbae8 in g_main_context_iterate (context=0x1070920, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2455
#42 0x00007ff8abcbbc9c in IA__g_main_context_iteration (context=0x1070920, may_block=1) at gmain.c:2518
#43 0x00007ff8b092045f in QEventDispatcherGlib::processEvents (this=0x10693b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#44 0x00007ff8b174289f in QGuiEventDispatcherGlib::processEvents (this=0x7fff98c5e250, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#45 0x00007ff8b08fa442 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#46 0x00007ff8b08fa5dc in QEventLoop::exec (this=0x7fff98c61300, flags=...) at kernel/qeventloop.cpp:197
#47 0x00007ff8b08fc61c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0x0000000000404b49 in main (argc=1, argv=0x7fff98c61a78) at /var/tmp/portage/kde-base/kontact-4.3.4/work/kontact-4.3.4/kontact/src/main.cpp:218

Reported using DrKonqi