Application: plasma-desktop (4.11.20)
KDE Platform Version: 4.14.9
Qt Version: 4.8.6
Operating System: Linux 3.16.7-24-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

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

I have 2 activities A and B. I am running on A, I try to change the name and icon of A: 
- On A, click Activity button.
- Select edit icon, 
- Change name
- Select icon to change icon
- While change icon dialog is open, select Apply. 
- Change icon dialog still open, select edit, change icon again. 
-Close 2nd change icon dialog. 
- Close 1st change icon dialog. 
* Plasma crash into black screen and restart successfully.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f18f60cf780 (LWP 1527))]

Thread 3 (Thread 0x7f18ca198700 (LWP 1528)):
#0  0x00007f18f49a105f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f18e722e8cb in  () at /usr/lib64/libQtScript.so.4
#2  0x00007f18e722e909 in  () at /usr/lib64/libQtScript.so.4
#3  0x00007f18f499d0a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f18f370a08d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f183fa25700 (LWP 1533)):
#0  0x00007f18f3701c5d in poll () at /lib64/libc.so.6
#1  0x00007f18f0814be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f18f0814cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f18f4d620de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#4  0x00007f18f4d33e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#5  0x00007f18f4d34165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#6  0x00007f18f4c310bf in QThread::exec() () at /usr/lib64/libQtCore.so.4
#7  0x00007f18f4d15783 in  () at /usr/lib64/libQtCore.so.4
#8  0x00007f18f4c3379f in  () at /usr/lib64/libQtCore.so.4
#9  0x00007f18f499d0a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f18f370a08d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f18f60cf780 (LWP 1527)):
[KCrash Handler]
#5  0x00007f18e6ac7100 in QDeclarativeError::isValid() const () at /usr/lib64/libQtDeclarative.so.4
#6  0x00007f18e6ab095b in  () at /usr/lib64/libQtDeclarative.so.4
#7  0x00007f18f4d493f8 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /usr/lib64/libQtCore.so.4
#8  0x00007f18e6b65802 in  () at /usr/lib64/libQtDeclarative.so.4
#9  0x00007f18e6a1a426 in  () at /usr/lib64/libQtDeclarative.so.4
#10 0x00007f18e6a1b406 in  () at /usr/lib64/libQtDeclarative.so.4
#11 0x00007f18f4455c52 in QGraphicsItem::sceneEvent(QEvent*) () at /usr/lib64/libQtGui.so.4
#12 0x00007f18e6a0e364 in QDeclarativeItem::sceneEvent(QEvent*) () at /usr/lib64/libQtDeclarative.so.4
#13 0x00007f18e6a1bb71 in  () at /usr/lib64/libQtDeclarative.so.4
#14 0x00007f18f447cb9f in  () at /usr/lib64/libQtGui.so.4
#15 0x00007f18f4485f4f in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () at /usr/lib64/libQtGui.so.4
#16 0x00007f18f4491dd0 in QGraphicsScene::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#17 0x00007f18f3eb176c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#18 0x00007f18f3eb7cad in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#19 0x00007f18f5ad8e0a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#20 0x00007f18f4d352ad in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQtCore.so.4
#21 0x00007f18f44a8a07 in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () at /usr/lib64/libQtGui.so.4
#22 0x00007f18f3f00c0a in QWidget::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#23 0x00007f18f429d5ee in QFrame::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#24 0x00007f18f44a9429 in QGraphicsView::viewportEvent(QEvent*) () at /usr/lib64/libQtGui.so.4
#25 0x00007f18f4d35416 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib64/libQtCore.so.4
#26 0x00007f18f3eb174c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#27 0x00007f18f3eb7dea in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#28 0x00007f18f5ad8e0a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#29 0x00007f18f4d352ad in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQtCore.so.4
#30 0x00007f18f3eb75e3 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib64/libQtGui.so.4
#31 0x00007f18f3f28c9b in  () at /usr/lib64/libQtGui.so.4
#32 0x00007f18f3f2770c in QApplication::x11ProcessEvent(_XEvent*) () at /usr/lib64/libQtGui.so.4
#33 0x00007f18f3f4e5c2 in  () at /usr/lib64/libQtGui.so.4
#34 0x00007f18f0814a04 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#35 0x00007f18f0814c48 in  () at /usr/lib64/libglib-2.0.so.0
#36 0x00007f18f0814cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#37 0x00007f18f4d620be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#38 0x00007f18f3f4e676 in  () at /usr/lib64/libQtGui.so.4
#39 0x00007f18f4d33e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#40 0x00007f18f4d34165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#41 0x00007f18f4d395b9 in QCoreApplication::exec() () at /usr/lib64/libQtCore.so.4
#42 0x00007f18dde8cb94 in kdemain () at /usr/lib64/libkdeinit4_plasma-desktop.so
#43 0x0000000000408815 in _start ()

Reported using DrKonqi