Application: plasma-desktop (4.11.17)
KDE Platform Version: 4.14.6
Qt Version: 4.8.6
Operating System: Linux 3.18.6-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:
After choosing which pieces of the hardware info widget I wanted showing at any given time, Attempted to relocate the widget containing the hardware info information to a second monitor (placed to the left of the main screen, and designated as such in the system settings). 

- Unusual behavior I noticed:

The pop-out sub-window that allows access to the settings of the widget, as well as the ability to close the widget, would remain in appearence, and duplicates of said sub-window remained present on the screen, yet inactive and/or unclickable. 

- Custom settings of the application:

Only had the CPU monitor (showing total CPU usage only), the network monitor, RAM Monitor and the temperature monitor open at the time of the crash. My video card driver may not be optimized, however I've played several games without any issue before this.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff9362c7780 (LWP 550))]

Thread 3 (Thread 0x7ff90a366700 (LWP 555)):
#0  0x00007ff934b2f9af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ff9275961ca in ?? () from /usr/lib/libQtScript.so.4
#2  0x00007ff9275961f9 in ?? () from /usr/lib/libQtScript.so.4
#3  0x00007ff934b2a374 in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007ff93386a27d in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7ff87ef97700 (LWP 556)):
#0  0x00007ff9338614ed in poll () from /usr/lib/libc.so.6
#1  0x00007ff9309579a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ff930957abc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ff934ef5397 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#4  0x00007ff934ec4de1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007ff934ec5145 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007ff934db97f9 in QThread::exec() () from /usr/lib/libQtCore.so.4
#7  0x00007ff934ea56c3 in ?? () from /usr/lib/libQtCore.so.4
#8  0x00007ff934dbc05f in ?? () from /usr/lib/libQtCore.so.4
#9  0x00007ff934b2a374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007ff93386a27d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7ff9362c7780 (LWP 550)):
[KCrash Handler]
#6  0x00007ff9345e705f in QGraphicsItem::setParentItem(QGraphicsItem*) () from /usr/lib/libQtGui.so.4
#7  0x00007ff90ca57341 in ?? () from /usr/lib/libplasma_groupingcontainment.so.4
#8  0x00007ff90ca57999 in GroupingContainment::setMovingWidget(QGraphicsWidget*) () from /usr/lib/libplasma_groupingcontainment.so.4
#9  0x00007ff90ca5a25c in GroupingContainment::eventFilter(QObject*, QEvent*) () from /usr/lib/libplasma_groupingcontainment.so.4
#10 0x00007ff934ec63f6 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#11 0x00007ff933ffb98c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007ff934002408 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007ff935ca86fa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#14 0x00007ff934ec628d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x00007ff93463d682 in QGraphicsWidget::setGeometry(QRectF const&) () from /usr/lib/libQtGui.so.4
#16 0x00007ff934641d29 in ?? () from /usr/lib/libQtGui.so.4
#17 0x00007ff93463e33d in QGraphicsWidget::itemChange(QGraphicsItem::GraphicsItemChange, QVariant const&) () from /usr/lib/libQtGui.so.4
#18 0x00007ff929e3f0a6 in Plasma::Applet::itemChange(QGraphicsItem::GraphicsItemChange, QVariant const&) () from /usr/lib/libplasma.so.3
#19 0x00007ff9345ec1e6 in QGraphicsItem::setPos(QPointF const&) () from /usr/lib/libQtGui.so.4
#20 0x00007ff929e9fa67 in ?? () from /usr/lib/libplasma.so.3
#21 0x00007ff9345defc3 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007ff929e9d979 in ?? () from /usr/lib/libplasma.so.3
#23 0x00007ff9346080e7 in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007ff934611466 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#25 0x00007ff93461e3cf in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x00007ff933ffb9ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007ff934002408 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x00007ff935ca86fa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#29 0x00007ff934ec628d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#30 0x00007ff9346346e8 in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#31 0x00007ff93463577a in QGraphicsView::mouseMoveEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#32 0x00007ff93404ec08 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007ff93440ef7e in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#34 0x00007ff934636f2d in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007ff934ec63f6 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#36 0x00007ff933ffb98c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x00007ff93400256f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#38 0x00007ff935ca86fa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#39 0x00007ff934ec628d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#40 0x00007ff934001bcf in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/libQtGui.so.4
#41 0x00007ff9340787a2 in ?? () from /usr/lib/libQtGui.so.4
#42 0x00007ff93407719c in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#43 0x00007ff93409f2e2 in ?? () from /usr/lib/libQtGui.so.4
#44 0x00007ff93095771d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#45 0x00007ff930957a08 in ?? () from /usr/lib/libglib-2.0.so.0
#46 0x00007ff930957abc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#47 0x00007ff934ef537d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#48 0x00007ff93409f3a6 in ?? () from /usr/lib/libQtGui.so.4
#49 0x00007ff934ec4de1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#50 0x00007ff934ec5145 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#51 0x00007ff934eca6e9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#52 0x00007ff91df4845d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#53 0x0000000000408118 in ?? ()
#54 0x0000000000408f39 in ?? ()
#55 0x0000000000409683 in ?? ()
#56 0x000000000040525d in ?? ()
#57 0x00007ff9337a2800 in __libc_start_main () from /usr/lib/libc.so.6
#58 0x0000000000405ec9 in _start ()

Possible duplicates by query: bug 338464.

Reported using DrKonqi