Application: kded4 (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.5
Operating System: Linux 3.11.6-200.fc19.x86_64 x86_64
Distribution: "Fedora release 19 (Schrödinger’s Cat)"

-- Information about the crash:
- What I was doing when the application crashed:

When I use digiKam to scan for faces, it seems crashed. Then I tried to click on digiKam's appmenu, and the appmenu crashed, too.

-- Backtrace:
Application: KDE 守护进程 (kded4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4bcade58c0 (LWP 815))]

Thread 4 (Thread 0x7f4bad5ba700 (LWP 920)):
#0  0x0000003db5086f9d in g_mutex_get_impl () from /lib64/libglib-2.0.so.0
#1  0x0000003db5087279 in g_mutex_unlock () from /lib64/libglib-2.0.so.0
#2  0x0000003db5047a0b in g_main_context_query () from /lib64/libglib-2.0.so.0
#3  0x0000003db5048062 in g_main_context_iterate.isra.22 () from /lib64/libglib-2.0.so.0
#4  0x0000003db504855a in g_main_loop_run () from /lib64/libglib-2.0.so.0
#5  0x0000003dc26c6d66 in gdbus_shared_thread_func () from /lib64/libgio-2.0.so.0
#6  0x0000003db506c185 in g_thread_proxy () from /lib64/libglib-2.0.so.0
#7  0x00007f4bc7c18c53 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f4bc7129e1d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f4bacbad700 (LWP 928)):
#0  0x00007f4bc7c1aa78 in pthread_mutex_lock () from /lib64/libpthread.so.0
#1  0x0000003db5087251 in g_mutex_lock () from /lib64/libglib-2.0.so.0
#2  0x0000003db5047b7c in g_main_context_check () from /lib64/libglib-2.0.so.0
#3  0x0000003db504808b in g_main_context_iterate.isra.22 () from /lib64/libglib-2.0.so.0
#4  0x0000003db50481fc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00007f4bc7fd4166 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x00007f4bc7fa5ecf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x00007f4bc7fa61c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#8  0x00007f4bc7ea566f in QThread::exec() () from /lib64/libQtCore.so.4
#9  0x00007f4bc7f87733 in QInotifyFileSystemWatcherEngine::run() () from /lib64/libQtCore.so.4
#10 0x00007f4bc7ea7d0f in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#11 0x00007f4bc7c18c53 in start_thread () from /lib64/libpthread.so.0
#12 0x00007f4bc7129e1d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f4ba547c700 (LWP 1409)):
#0  0x00007f4bc711f84d in poll () from /lib64/libc.so.6
#1  0x0000003db50480f4 in g_main_context_iterate.isra.22 () from /lib64/libglib-2.0.so.0
#2  0x0000003db50481fc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f4bc7fd4166 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#4  0x00007f4bc7fa5ecf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#5  0x00007f4bc7fa61c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x00007f4bc7ea566f in QThread::exec() () from /lib64/libQtCore.so.4
#7  0x00007f4bc7f87733 in QInotifyFileSystemWatcherEngine::run() () from /lib64/libQtCore.so.4
#8  0x00007f4bc7ea7d0f in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#9  0x00007f4bc7c18c53 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f4bc7129e1d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f4bcade58c0 (LWP 815)):
[KCrash Handler]
#5  0x00007f4bc7fbe673 in QMetaObject::changeGuard(QObject**, QObject*) () from /lib64/libQtCore.so.4
#6  0x00007f4bc943da4c in QGraphicsProxyWidgetPrivate::sendWidgetMouseEvent(QGraphicsSceneMouseEvent*) () from /lib64/libQtGui.so.4
#7  0x00007f4bc941fed2 in QGraphicsItem::sceneEvent(QEvent*) () from /lib64/libQtGui.so.4
#8  0x00007f4bc9446f8f in QGraphicsScenePrivate::sendMouseEvent(QGraphicsSceneMouseEvent*) () from /lib64/libQtGui.so.4
#9  0x00007f4bc944fbef in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /lib64/libQtGui.so.4
#10 0x00007f4bc945bac0 in QGraphicsScene::event(QEvent*) () from /lib64/libQtGui.so.4
#11 0x00007f4bc8e7d4dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#12 0x00007f4bc8e83aa0 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#13 0x00007f4bc9b9be9a in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#14 0x00007f4bc7fa726d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#15 0x00007f4bc94727e7 in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /lib64/libQtGui.so.4
#16 0x00007f4bc8eccb1e in QWidget::event(QEvent*) () from /lib64/libQtGui.so.4
#17 0x00007f4bc9268cde in QFrame::event(QEvent*) () from /lib64/libQtGui.so.4
#18 0x00007f4bc9473209 in QGraphicsView::viewportEvent(QEvent*) () from /lib64/libQtGui.so.4
#19 0x00007f4bc7fa73d6 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#20 0x00007f4bc8e7d4bc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#21 0x00007f4bc8e83bdd in QApplication::notify(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#22 0x00007f4bc9b9be9a in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#23 0x00007f4bc7fa726d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#24 0x00007f4bc8e83393 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /lib64/libQtGui.so.4
#25 0x00007f4bc8ef492b in QETWidget::translateMouseEvent(_XEvent const*) () from /lib64/libQtGui.so.4
#26 0x00007f4bc8ef339c in QApplication::x11ProcessEvent(_XEvent*) () from /lib64/libQtGui.so.4
#27 0x00007f4bc8f19e54 in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQtGui.so.4
#28 0x0000003db5047e06 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#29 0x0000003db5048158 in g_main_context_iterate.isra.22 () from /lib64/libglib-2.0.so.0
#30 0x0000003db50481fc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#31 0x00007f4bc7fd4145 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#32 0x00007f4bc8f19fc6 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtGui.so.4
#33 0x00007f4bc7fa5ecf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#34 0x00007f4bc7fa61c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#35 0x00007f4bc7fab45b in QCoreApplication::exec() () from /lib64/libQtCore.so.4
#36 0x00007f4bcaa0facb in kdemain () from /lib64/libkdeinit4_kded4.so
#37 0x00007f4bc7055b75 in __libc_start_main () from /lib64/libc.so.6
#38 0x0000000000400811 in _start ()

Reported using DrKonqi