Application: plasma-desktop (4.11.11)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.0-43-generic x86_64
Distribution: Ubuntu 14.04.2 LTS

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

hello!
 when i tried to move system monitor widget from dektop inside of my default panel - plasma crashed

nice day
Simon :)

The crash can be reproduced sometimes.

-- Backtrace:
Application: Namizna lupina Plasma (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6c63a58800 (LWP 2407))]

Thread 4 (Thread 0x7f6c2ff6c700 (LWP 2409)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6c5c71bffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f6c5c71c039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f6c57292182 in start_thread (arg=0x7f6c2ff6c700) at pthread_create.c:312
#4  0x00007f6c6335d47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f6bae1c7700 (LWP 2410)):
#0  0x00007f6c6335012d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6c56b80fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6c56b810ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6c5ff317be in QEventDispatcherGlib::processEvents (this=0x7f6ba80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f6c5ff030af in QEventLoop::processEvents (this=this@entry=0x7f6bae1c6da0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6c5ff033a5 in QEventLoop::exec (this=this@entry=0x7f6bae1c6da0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6c5fdffc5f in QThread::exec (this=this@entry=0x2ecb6a0) at thread/qthread.cpp:537
#7  0x00007f6c5fee4823 in QInotifyFileSystemWatcherEngine::run (this=0x2ecb6a0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f6c5fe0232f in QThreadPrivate::start (arg=0x2ecb6a0) at thread/qthread_unix.cpp:349
#9  0x00007f6c57292182 in start_thread (arg=0x7f6bae1c7700) at pthread_create.c:312
#10 0x00007f6c6335d47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f6ba73d3700 (LWP 2414)):
#0  0x00007f6c56bc261a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6c56bc29a9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6c56b80a59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6c56b80f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6c56b810ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6c5ff317be in QEventDispatcherGlib::processEvents (this=0x7f6b980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007f6c5ff030af in QEventLoop::processEvents (this=this@entry=0x7f6ba73d2da0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f6c5ff033a5 in QEventLoop::exec (this=this@entry=0x7f6ba73d2da0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f6c5fdffc5f in QThread::exec (this=this@entry=0x341a820) at thread/qthread.cpp:537
#9  0x00007f6c5fee4823 in QInotifyFileSystemWatcherEngine::run (this=0x341a820) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f6c5fe0232f in QThreadPrivate::start (arg=0x341a820) at thread/qthread_unix.cpp:349
#11 0x00007f6c57292182 in start_thread (arg=0x7f6ba73d3700) at pthread_create.c:312
#12 0x00007f6c6335d47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f6c63a58800 (LWP 2407)):
[KCrash Handler]
#6  0x00007f6c37b56e9b in GroupingContainment::sceneEventFilter (this=0x201bf80, watched=<optimized out>, event=0x7ffeca057ec0) at ../../../../containments/groupingdesktop/lib/groupingcontainment.cpp:732
#7  0x00007f6c5f86e096 in QGraphicsScenePrivate::filterEvent (this=this@entry=0x1d3cef0, item=item@entry=0x1facd70, event=event@entry=0x7ffeca057ec0) at graphicsview/qgraphicsscene.cpp:1181
#8  0x00007f6c5f86e125 in QGraphicsScenePrivate::sendEvent (this=0x1d3cef0, item=0x1facd70, event=0x7ffeca057ec0) at graphicsview/qgraphicsscene.cpp:1209
#9  0x00007f6c5f876aa1 in QGraphicsScenePrivate::sendHoverEvent (this=this@entry=0x1d3cef0, type=type@entry=QEvent::GraphicsSceneHoverEnter, item=0x1facd70, hoverEvent=hoverEvent@entry=0x7ffeca057fa0) at graphicsview/qgraphicsscene.cpp:1268
#10 0x00007f6c5f876e02 in QGraphicsScenePrivate::dispatchHoverEvent (this=this@entry=0x1d3cef0, hoverEvent=hoverEvent@entry=0x7ffeca057fa0) at graphicsview/qgraphicsscene.cpp:3939
#11 0x00007f6c5f87725a in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7ffeca0582e0) at graphicsview/qgraphicsscene.cpp:4097
#12 0x00007f6c5f8830fc in QGraphicsScene::event (this=0x1d63990, event=0x7ffeca0582e0) at graphicsview/qgraphicsscene.cpp:3451
#13 0x00007f6c5f29de2c in QApplicationPrivate::notify_helper (this=this@entry=0x1c12ac0, receiver=receiver@entry=0x1d63990, e=e@entry=0x7ffeca0582e0) at kernel/qapplication.cpp:4567
#14 0x00007f6c5f2a44a0 in QApplication::notify (this=this@entry=0x1bc5e30, receiver=receiver@entry=0x1d63990, e=e@entry=0x7ffeca0582e0) at kernel/qapplication.cpp:4353
#15 0x00007f6c60bc9cca in KApplication::notify (this=0x1bc5e30, receiver=0x1d63990, event=0x7ffeca0582e0) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007f6c5ff044dd in QCoreApplication::notifyInternal (this=0x1bc5e30, receiver=0x1d63990, event=event@entry=0x7ffeca0582e0) at kernel/qcoreapplication.cpp:953
#17 0x00007f6c5f29c556 in sendSpontaneousEvent (event=event@entry=0x7ffeca0582e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#18 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7ffeca0582e0) at kernel/qapplication.cpp:5565
#19 0x00007f6c5f8982fc in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x42516c0, event=event@entry=0x7ffeca058930) at graphicsview/qgraphicsview.cpp:646
#20 0x00007f6c5f89920a in QGraphicsView::mouseMoveEvent (this=0x4251670, event=0x7ffeca058930) at graphicsview/qgraphicsview.cpp:3276
#21 0x00007f6c5f2ed645 in QWidget::event (this=this@entry=0x4251670, event=event@entry=0x7ffeca058930) at kernel/qwidget.cpp:8361
#22 0x00007f6c5f68f04e in QFrame::event (this=0x4251670, e=0x7ffeca058930) at widgets/qframe.cpp:557
#23 0x00007f6c5f89a859 in QGraphicsView::viewportEvent (this=0x4251670, event=0x7ffeca058930) at graphicsview/qgraphicsview.cpp:2866
#24 0x00007f6c5ff04646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1c12ac0, receiver=receiver@entry=0x2e8a880, event=event@entry=0x7ffeca058930) at kernel/qcoreapplication.cpp:1063
#25 0x00007f6c5f29de0c in QApplicationPrivate::notify_helper (this=this@entry=0x1c12ac0, receiver=receiver@entry=0x2e8a880, e=e@entry=0x7ffeca058930) at kernel/qapplication.cpp:4563
#26 0x00007f6c5f2a45dd in QApplication::notify (this=this@entry=0x1bc5e30, receiver=receiver@entry=0x2e8a880, e=e@entry=0x7ffeca058930) at kernel/qapplication.cpp:4110
#27 0x00007f6c60bc9cca in KApplication::notify (this=0x1bc5e30, receiver=0x2e8a880, event=0x7ffeca058930) at ../../kdeui/kernel/kapplication.cpp:311
#28 0x00007f6c5ff044dd in QCoreApplication::notifyInternal (this=0x1bc5e30, receiver=receiver@entry=0x2e8a880, event=event@entry=0x7ffeca058930) at kernel/qcoreapplication.cpp:953
#29 0x00007f6c5f2a3d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#30 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x2e8a880, event=event@entry=0x7ffeca058930, alienWidget=alienWidget@entry=0x2e8a880, nativeWidget=nativeWidget@entry=0x4251670, buttonDown=buttonDown@entry=0x7f6c5fd83318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#31 0x00007f6c5f3189eb in QETWidget::translateMouseEvent (this=this@entry=0x4251670, event=event@entry=0x7ffeca058b80) at kernel/qapplication_x11.cpp:4634
#32 0x00007f6c5f3176ec in QApplication::x11ProcessEvent (this=0x1bc5e30, event=event@entry=0x7ffeca058cb0) at kernel/qapplication_x11.cpp:3828
#33 0x00007f6c5f33fb32 in x11EventSourceDispatch (s=0x1c0f1c0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#34 0x00007f6c56b80e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f6c56b81048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f6c56b810ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f6c5ff317a1 in QEventDispatcherGlib::processEvents (this=0x1b57e00, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#38 0x00007f6c5f33fbe6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#39 0x00007f6c5ff030af in QEventLoop::processEvents (this=this@entry=0x7ffeca059080, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007f6c5ff033a5 in QEventLoop::exec (this=this@entry=0x7ffeca059080, flags=...) at kernel/qeventloop.cpp:204
#41 0x00007f6c5ff08b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#42 0x00007f6c5f29c37c in QApplication::exec () at kernel/qapplication.cpp:3828
#43 0x00007f6c6366467c in kdemain (argc=1, argv=0x7ffeca0592d8) at ../../../../plasma/desktop/shell/main.cpp:126
#44 0x00007f6c63284ec5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7ffeca0592d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffeca0592c8) at libc-start.c:287
#45 0x000000000040070e in _start ()

Reported using DrKonqi