Application: dolphin (4.11.5)
KDE Platform Version: 4.11.5
Qt Version: 4.8.5
Operating System: Linux 3.12.8-200.fc19.i686.PAE i686
Distribution (Platform): Fedora RPMs

-- Information about the crash:
* started typing a new tag name
* deleted all characters of it with backspace - crashes at this moment

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0xb77097c0 (LWP 24026))]

Thread 2 (Thread 0xb4331b40 (LWP 24030)):
#0  0xb7759424 in __kernel_vsyscall ()
#1  0x4e07c25b in read () from /lib/libpthread.so.0
#2  0x4679e3c6 in g_wakeup_acknowledge () from /lib/libglib-2.0.so.0
#3  0x4675aeeb in g_main_context_check () from /lib/libglib-2.0.so.0
#4  0x4675b3aa in g_main_context_iterate.isra.21 () from /lib/libglib-2.0.so.0
#5  0x4675b559 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#6  0x44a39b7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#7  0x44a08444 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#8  0x44a08781 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#9  0x448f3a9d in QThread::exec() () from /lib/libQtCore.so.4
#10 0x449e81d5 in QInotifyFileSystemWatcherEngine::run() () from /lib/libQtCore.so.4
#11 0x448f6450 in QThreadPrivate::start(void*) () from /lib/libQtCore.so.4
#12 0x4e0759da in start_thread () from /lib/libpthread.so.0
#13 0x4df59bfe in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb77097c0 (LWP 24026)):
[KCrash Handler]
#6  0x4214f8e0 in KEditTagsDialog::slotTextEdited(QString const&) () from /lib/libnepomukwidgets.so.4
#7  0x44a1ec1b in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib/libQtCore.so.4
#8  0x46203b46 in QLineEdit::textEdited(QString const&) () from /lib/libQtGui.so.4
#9  0x461fe978 in QLineEditPrivate::_q_textEdited(QString const&) () from /lib/libQtGui.so.4
#10 0x46203efa in QLineEdit::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib/libQtGui.so.4
#11 0x44a1ec1b in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib/libQtCore.so.4
#12 0x4649aa46 in QLineControl::textEdited(QString const&) () from /lib/libQtGui.so.4
#13 0x46209cdc in QLineControl::finishChange(int, bool, bool) () from /lib/libQtGui.so.4
#14 0x46209da0 in QLineControl::backspace() () from /lib/libQtGui.so.4
#15 0x4620c418 in QLineControl::processKeyEvent(QKeyEvent*) () from /lib/libQtGui.so.4
#16 0x461ffac0 in QLineEdit::keyPressEvent(QKeyEvent*) () from /lib/libQtGui.so.4
#17 0x43ccf1a1 in KLineEdit::keyPressEvent(QKeyEvent*) () from /lib/libkdeui.so.5
#18 0x45de6d3a in QWidget::event(QEvent*) () from /lib/libQtGui.so.4
#19 0x46205a8b in QLineEdit::event(QEvent*) () from /lib/libQtGui.so.4
#20 0x43cd0295 in KLineEdit::event(QEvent*) () from /lib/libkdeui.so.5
#21 0x45d8c1a4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/libQtGui.so.4
#22 0x45d945a8 in QApplication::notify(QObject*, QEvent*) () from /lib/libQtGui.so.4
#23 0x43c03fa5 in KApplication::notify(QObject*, QEvent*) () from /lib/libkdeui.so.5
#24 0x44a09a3a in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib/libQtCore.so.4
#25 0x45d8a84e in qt_sendSpontaneousEvent(QObject*, QEvent*) () from /lib/libQtGui.so.4
#26 0x45e3a46c in QKeyMapper::sendKeyEvent(QWidget*, bool, QEvent::Type, int, QFlags<Qt::KeyboardModifier>, QString const&, bool, int, unsigned int, unsigned int, unsigned int, bool*) () from /lib/libQtGui.so.4
#27 0x45e3a868 in QKeyMapperPrivate::translateKeyEvent(QWidget*, _XEvent const*, bool) () from /lib/libQtGui.so.4
#28 0x45e126fd in QApplication::x11ProcessEvent(_XEvent*) () from /lib/libQtGui.so.4
#29 0x45e3d0fb in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib/libQtGui.so.4
#30 0x4675b0e6 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x4675b498 in g_main_context_iterate.isra.21 () from /lib/libglib-2.0.so.0
#32 0x4675b559 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x44a39b60 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#34 0x45e3d2af in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtGui.so.4
#35 0x44a08444 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#36 0x44a08781 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#37 0x44a0e21f in QCoreApplication::exec() () from /lib/libQtCore.so.4
#38 0x45d8a5f5 in QApplication::exec() () from /lib/libQtGui.so.4
#39 0x42862ad7 in kdemain () from /lib/libkdeinit4_dolphin.so
#40 0x0804872c in main ()

Reported using DrKonqi