Application: plasma-desktop (4.11.13)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 4.1.0-0.bpo.1-rt-amd64 x86_64
Distribution: Debian GNU/Linux 8.2 (jessie)

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

Right clicked on taskbar / Panel Options / Add widget... to add a widget
Then typed a beginning to search for one I need
Then started to drag it to desktop, but realized that I can't reach the desktop because of other maximised window.
Pressed Meta+D keys as this was configured to show desktop, then I could not finish the drag (no icon, nothing happens after clicking desktop)
So, I right clicked on desktop / Add widgets, typed beginning again, dragged the same widget, but noticed strange mouse cursor icon behaviour. After some dragging Desktop crashed.
Tried the same sequence again - another crash.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe5e6ef4800 (LWP 829))]

Thread 3 (Thread 0x7fe5ba814700 (LWP 832)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe5df8eedea in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fe5df8eee19 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fe5da11c0a4 in start_thread (arg=0x7fe5ba814700) at pthread_create.c:309
#4  0x00007fe5e67e804d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fe53037f700 (LWP 833)):
#0  0x00007fe5d97f8689 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe5d97f8e5a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5d97f8ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5e32a3d37 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007fe5e3273271 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007fe5e32735d5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007fe5e3167e99 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007fe5e3253ac3 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007fe5e316a70f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007fe5da11c0a4 in start_thread (arg=0x7fe53037f700) at pthread_create.c:309
#10 0x00007fe5e67e804d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fe5e6ef4800 (LWP 829)):
[KCrash Handler]
#6  0x00007fe5e25c5489 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007fe5e25cbfa8 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#8  0x00007fe5e3f981aa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#9  0x00007fe5e327471d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007fe5e2bd399e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x00007fe5e2bd3e97 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007fe5e2bde2e6 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007fe5e2beb2ef in QGraphicsScene::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007fe5e25c548c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007fe5e25cbfa8 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#16 0x00007fe5e3f981aa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#17 0x00007fe5e327471d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#18 0x00007fe5e2c01638 in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#19 0x00007fe5e2c026ca in QGraphicsView::mouseMoveEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007fe5e2618748 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#21 0x00007fe5e29da83e in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007fe5e2c03e81 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007fe5e3274886 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#24 0x00007fe5e25c546c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#25 0x00007fe5e25cc10f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#26 0x00007fe5e3f981aa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#27 0x00007fe5e327471d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#28 0x00007fe5e25cb76f in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#29 0x00007fe5e2642432 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#30 0x00007fe5e2640e2c in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#31 0x00007fe5e2669ed2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#32 0x00007fe5d97f8c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fe5d97f8f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007fe5d97f8ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fe5e32a3d1d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#36 0x00007fe5e2669f96 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#37 0x00007fe5e3273271 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#38 0x00007fe5e32735d5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#39 0x00007fe5e2651e4d in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#40 0x00007fe5e25d6f5a in QDrag::exec(QFlags<Qt::DropAction>, Qt::DropAction) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#41 0x00007fe5b922df88 in ?? () from /usr/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#42 0x00007fe5b922e039 in ?? () from /usr/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#43 0x00007fe5e2bcefe0 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#44 0x00007fe5e2bd395e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#45 0x00007fe5e2bd3e97 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#46 0x00007fe5e2bde2e6 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#47 0x00007fe5e2beb2ef in QGraphicsScene::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#48 0x00007fe5e25c548c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#49 0x00007fe5e25cbfa8 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#50 0x00007fe5e3f981aa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#51 0x00007fe5e327471d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#52 0x00007fe5e2c01638 in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#53 0x00007fe5e2c026ca in QGraphicsView::mouseMoveEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#54 0x00007fe5e2618748 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#55 0x00007fe5e29da83e in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#56 0x00007fe5e2c03e81 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#57 0x00007fe5e3274886 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#58 0x00007fe5e25c546c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#59 0x00007fe5e25cc10f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#60 0x00007fe5e3f981aa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#61 0x00007fe5e327471d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#62 0x00007fe5e25cb76f in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#63 0x00007fe5e2642432 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#64 0x00007fe5e2640e2c in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#65 0x00007fe5e2669ed2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#66 0x00007fe5d97f8c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#67 0x00007fe5d97f8f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#68 0x00007fe5d97f8ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#69 0x00007fe5e32a3d1d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#70 0x00007fe5e2669f96 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#71 0x00007fe5e3273271 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#72 0x00007fe5e32735d5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#73 0x00007fe5e3279059 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#74 0x00007fe5e6aeb4bd in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#75 0x00007fe5e6723b45 in __libc_start_main (main=0x4006f0, argc=1, argv=0x7fffca25ae88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffca25ae78) at libc-start.c:287
#76 0x000000000040071e in _start ()

Possible duplicates by query: bug 352745, bug 352730, bug 352708, bug 352575, bug 352373.

Reported using DrKonqi