Bug 320993

Application: plasma-desktop (4.10.3)
KDE Platform Version: 4.10.3
Qt Version: 4.8.4
Operating System: Linux 3.9.4-200.fc18.x86_64 x86_64
Distribution: "Fedora release 18 (Spherical Cow)"

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

Was moving a Desktop Widget from one monitor to another external monitor.

The crash can be reproduced sometimes.

-- 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 0x7ff4f272a880 (LWP 1662))]

Thread 5 (Thread 0x7ff4dfc5b700 (LWP 1663)):
#0  0x0000003b4de0e12d in read () from /lib64/libpthread.so.0
#1  0x00007ff4f4b230df in g_wakeup_acknowledge () from /lib64/libglib-2.0.so.0
#2  0x00007ff4f4ae68b4 in g_main_context_check () from /lib64/libglib-2.0.so.0
#3  0x00007ff4f4ae6cc2 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#4  0x00007ff4f4ae6e44 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00007ff4fa1d4fa6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x00007ff4fa1a55ef in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x00007ff4fa1a5878 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#8  0x00007ff4fa0a7980 in QThread::exec() () from /lib64/libQtCore.so.4
#9  0x00007ff4fa185e1f in QInotifyFileSystemWatcherEngine::run() () from /lib64/libQtCore.so.4
#10 0x00007ff4fa0aa95c in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#11 0x0000003b4de07d15 in start_thread () from /lib64/libpthread.so.0
#12 0x0000003b4daf248d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7ff4dcb6e700 (LWP 1664)):
#0  0x0000003b4de0b5e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000003b59d868c7 in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /lib64/libQtScript.so.4
#2  0x0000003b59d868f9 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /lib64/libQtScript.so.4
#3  0x0000003b4de07d15 in start_thread () from /lib64/libpthread.so.0
#4  0x0000003b4daf248d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7ff449d4e700 (LWP 1673)):
#0  0x00007fffd6dfeaf7 in clock_gettime ()
#1  0x0000003b4e60413d in clock_gettime () from /lib64/librt.so.1
#2  0x00007ff4fa1008d4 in qt_gettime() () from /lib64/libQtCore.so.4
#3  0x00007ff4fa1d58ad in QTimerInfoList::updateCurrentTime() () from /lib64/libQtCore.so.4
#4  0x00007ff4fa1d49e5 in timerSourceCheckHelper(GTimerSource*) () from /lib64/libQtCore.so.4
#5  0x00007ff4f4ae682c in g_main_context_check () from /lib64/libglib-2.0.so.0
#6  0x00007ff4f4ae6cc2 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#7  0x00007ff4f4ae6e44 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#8  0x00007ff4fa1d4fa6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#9  0x00007ff4fa1a55ef in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#10 0x00007ff4fa1a5878 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#11 0x00007ff4fa0a7980 in QThread::exec() () from /lib64/libQtCore.so.4
#12 0x00007ff44a6512d5 in KCupsConnection::run() () from /lib64/libkcupslib.so
#13 0x00007ff4fa0aa95c in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#14 0x0000003b4de07d15 in start_thread () from /lib64/libpthread.so.0
#15 0x0000003b4daf248d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7ff443fff700 (LWP 2390)):
#0  0x00007ff4f4b239e1 in g_private_get_impl () from /lib64/libglib-2.0.so.0
#1  0x00007ff4f4b24159 in g_private_get () from /lib64/libglib-2.0.so.0
#2  0x00007ff4f4b0aae0 in g_thread_self () from /lib64/libglib-2.0.so.0
#3  0x00007ff4f4ae601e in g_main_context_acquire () from /lib64/libglib-2.0.so.0
#4  0x00007ff4f4ae6c04 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#5  0x00007ff4f4ae6e44 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#6  0x00007ff4fa1d4fa6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x00007ff4fa1a55ef in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#8  0x00007ff4fa1a5878 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#9  0x00007ff4fa0a7980 in QThread::exec() () from /lib64/libQtCore.so.4
#10 0x00007ff4fa0aa95c in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#11 0x0000003b4de07d15 in start_thread () from /lib64/libpthread.so.0
#12 0x0000003b4daf248d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7ff4f272a880 (LWP 1662)):
[KCrash Handler]
#5  0x00007ff416a0612a in GroupingContainment::sceneEventFilter(QGraphicsItem*, QEvent*) () from /lib64/libplasma_groupingcontainment.so.4
#6  0x0000003b595af4be in QGraphicsScenePrivate::filterEvent(QGraphicsItem*, QEvent*) () from /lib64/libQtGui.so.4
#7  0x0000003b595af540 in QGraphicsScenePrivate::sendEvent(QGraphicsItem*, QEvent*) () from /lib64/libQtGui.so.4
#8  0x0000003b595b037e in QGraphicsScenePrivate::sendHoverEvent(QEvent::Type, QGraphicsItem*, QGraphicsSceneHoverEvent*) () from /lib64/libQtGui.so.4
#9  0x0000003b595b091d in QGraphicsScenePrivate::dispatchHoverEvent(QGraphicsSceneHoverEvent*) () from /lib64/libQtGui.so.4
#10 0x0000003b595b0d17 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /lib64/libQtGui.so.4
#11 0x0000003b595c2fe0 in QGraphicsScene::event(QEvent*) () from /lib64/libQtGui.so.4
#12 0x0000003b58fca5cc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#13 0x0000003b58fcea4a in QApplication::notify(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#14 0x00007ff4fae75f16 in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#15 0x00007ff4fa1a693e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#16 0x0000003b595d61c4 in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () from /lib64/libQtGui.so.4
#17 0x0000003b595d923e in QGraphicsView::mouseMoveEvent(QMouseEvent*) () from /lib64/libQtGui.so.4
#18 0x0000003b59019f7b in QWidget::event(QEvent*) () from /lib64/libQtGui.so.4
#19 0x0000003b593c49f6 in QFrame::event(QEvent*) () from /lib64/libQtGui.so.4
#20 0x0000003b595dc56b in QGraphicsView::viewportEvent(QEvent*) () from /lib64/libQtGui.so.4
#21 0x00007ff4fa1a6aa6 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#22 0x0000003b58fca59c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#23 0x0000003b58fcf2ab in QApplication::notify(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#24 0x00007ff4fae75f16 in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#25 0x00007ff4fa1a693e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#26 0x0000003b58fcb40b in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /lib64/libQtGui.so.4
#27 0x0000003b59045b74 in QETWidget::translateMouseEvent(_XEvent const*) () from /lib64/libQtGui.so.4
#28 0x0000003b59044901 in QApplication::x11ProcessEvent(_XEvent*) () from /lib64/libQtGui.so.4
#29 0x0000003b5906aa5c in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQtGui.so.4
#30 0x00007ff4f4ae6a55 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#31 0x00007ff4f4ae6d88 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#32 0x00007ff4f4ae6e44 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#33 0x00007ff4fa1d4f86 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#34 0x0000003b5906a73e in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtGui.so.4
#35 0x00007ff4fa1a55ef in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#36 0x00007ff4fa1a5878 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#37 0x00007ff4fa1aa708 in QCoreApplication::exec() () from /lib64/libQtCore.so.4
#38 0x00007ff4fdb37611 in kdemain () from /lib64/libkdeinit4_plasma-desktop.so
#39 0x0000003b4da21a05 in __libc_start_main () from /lib64/libc.so.6
#40 0x0000000000400971 in _start ()

Possible duplicates by query: bug 315704, bug 304117, bug 303008.

Reported using DrKonqi