Sometimes when closing a window (e.g. if I close a Konsole with Ctrl-D), plasmashell would crash and restart itself.

Reproducible: Sometimes

Steps to Reproduce:
I have a dual monitor setup and it sometimes occurs when closing a Konsole window with Ctrl-D.

Actual Results:  
plasmashell crashed and restarted itself.

Expected Results:  
plasmashell should keep running.

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7afc627800 (LWP 933))]

Thread 7 (Thread 0x7f7a33267700 (LWP 1311)):
#0  0x00007f7af5cf848d in poll () from /usr/lib/libc.so.6
#1  0x00007f7af0fa7fd6 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7af0fa80ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f7af661a5ab in QEventDispatcherGlib::processEvents (this=0x7f7a2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7af65c40ea in QEventLoop::exec (this=this@entry=0x7f7a33266d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f7af63e70f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f7a357990d7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#7  0x00007f7af63ebd78 in QThreadPrivate::start (arg=0x50c5340) at thread/qthread_unix.cpp:344
#8  0x00007f7af54fb454 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7af5d017df in clone () from /usr/lib/libc.so.6

Thread 6 (Thread 0x7f7a455a2700 (LWP 1012)):
#0  0x00007f7af0fec044 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f7af0fa6f5e in g_main_context_acquire () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7af0fa7e85 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f7af0fa80ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f7af661a5ab in QEventDispatcherGlib::processEvents (this=0x7f7a400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f7af65c40ea in QEventLoop::exec (this=this@entry=0x7f7a455a1d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#6  0x00007f7af63e70f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f7afa2e78a6 in ?? () from /usr/lib/libQt5Quick.so.5
#8  0x00007f7af63ebd78 in QThreadPrivate::start (arg=0x2beb3c0) at thread/qthread_unix.cpp:344
#9  0x00007f7af54fb454 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f7af5d017df in clone () from /usr/lib/libc.so.6

Thread 5 (Thread 0x7f7ad27aa700 (LWP 990)):
#0  0x00007f7af550110f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f7afbd77ac4 in ?? () from /usr/lib/libQt5Script.so.5
#2  0x00007f7afbd77b09 in ?? () from /usr/lib/libQt5Script.so.5
#3  0x00007f7af54fb454 in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007f7af5d017df in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f7ad3fff700 (LWP 974)):
#0  0x00007ffc42bcaa48 in clock_gettime ()
#1  0x00007f7af5d0e6b6 in clock_gettime () from /usr/lib/libc.so.6
#2  0x00007f7af6491191 in qt_clock_gettime (ts=0x7f7ad3ffeb00, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:109
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:164
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:173
#5  0x00007f7af6618249 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f7acc002ed0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f7af66187f5 in QTimerInfoList::timerWait (this=0x7f7acc002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f7af6619b7e in timerSourcePrepareHelper (timeout=0x7f7ad3ffebd4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f7ad3ffebd4) at kernel/qeventdispatcher_glib.cpp:165
#9  0x00007f7af0fa750d in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#10 0x00007f7af0fa7efb in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x00007f7af0fa80ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#12 0x00007f7af661a5ab in QEventDispatcherGlib::processEvents (this=0x7f7acc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f7af65c40ea in QEventLoop::exec (this=this@entry=0x7f7ad3ffeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#14 0x00007f7af63e70f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#15 0x00007f7af9748445 in ?? () from /usr/lib/libQt5Qml.so.5
#16 0x00007f7af63ebd78 in QThreadPrivate::start (arg=0x24974f0) at thread/qthread_unix.cpp:344
#17 0x00007f7af54fb454 in start_thread () from /usr/lib/libpthread.so.0
#18 0x00007f7af5d017df in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f7ade242700 (LWP 947)):
#0  0x00007f7af63e2f49 in std::__atomic_base<QMutexData*>::compare_exchange_strong (__m2=<optimized out>, __m1=std::memory_order_acquire, __p2=<optimized out>, __p1=@0x7f7ade241b38: 0x0, this=0x2433630) at /usr/include/c++/6.1.1/bits/atomic_base.h:752
#1  std::atomic<QMutexData*>::compare_exchange_strong (__m=std::memory_order_acquire, __p2=<optimized out>, __p1=@0x7f7ade241b38: 0x0, this=0x2433630) at /usr/include/c++/6.1.1/atomic:475
#2  QAtomicOps<QMutexData*>::testAndSetAcquire<QMutexData*> (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_cxx11.h:165
#3  QBasicAtomicPointer<QMutexData>::testAndSetAcquire (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x2433630) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:259
#4  QBasicMutex::fastTryLock (current=<synthetic pointer>, this=0x2433630) at thread/qmutex.h:89
#5  QMutex::lock (this=this@entry=0x2433630) at thread/qmutex.cpp:225
#6  0x00007f7af6619d1f in QMutexLocker::QMutexLocker (m=0x2433630, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:137
#7  QThreadData::canWaitLocked (this=0x2433600) at ../../include/QtCore/5.7.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:253
#8  postEventSourcePrepare (s=0x7f7ad40012d0, timeout=0x7f7ade241bd4) at kernel/qeventdispatcher_glib.cpp:259
#9  0x00007f7af0fa750d in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#10 0x00007f7af0fa7efb in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x00007f7af0fa80ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#12 0x00007f7af661a5ab in QEventDispatcherGlib::processEvents (this=0x7f7ad40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f7af65c40ea in QEventLoop::exec (this=this@entry=0x7f7ade241da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#14 0x00007f7af63e70f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#15 0x00007f7af9748445 in ?? () from /usr/lib/libQt5Qml.so.5
#16 0x00007f7af63ebd78 in QThreadPrivate::start (arg=0x242b510) at thread/qthread_unix.cpp:344
#17 0x00007f7af54fb454 in start_thread () from /usr/lib/libpthread.so.0
#18 0x00007f7af5d017df in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f7ae7fba700 (LWP 934)):
#0  0x00007f7af5cf44ed in read () from /usr/lib/libc.so.6
#1  0x00007f7af0feac80 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7af0fa7ab4 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#3  0x00007f7af0fa7f74 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f7af0fa80ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0x00007f7af661a5ab in QEventDispatcherGlib::processEvents (this=0x7f7ae00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f7af65c40ea in QEventLoop::exec (this=this@entry=0x7f7ae7fb9d90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#7  0x00007f7af63e70f3 in QThread::exec (this=this@entry=0x7f7af73dbd20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#8  0x00007f7af716a645 in QDBusConnectionManager::run (this=0x7f7af73dbd20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196
#9  0x00007f7af63ebd78 in QThreadPrivate::start (arg=0x7f7af73dbd20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344
#10 0x00007f7af54fb454 in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f7af5d017df in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f7afc627800 (LWP 933)):
[KCrash Handler]
#5  QSortFilterProxyModelPrivate::updateChildrenMapping (this=this@entry=0x4c1ae50, source_parent=..., parent_mapping=parent_mapping@entry=0x66cb530, start=start@entry=2, end=end@entry=2, delta_item_count=delta_item_count@entry=1, remove=true, orient=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:975
#6  0x00007f7af658cf79 in QSortFilterProxyModelPrivate::source_items_removed (orient=Qt::Vertical, end=<optimized out>, start=2, source_parent=..., this=0x4c1ae50) at itemmodels/qsortfilterproxymodel.cpp:917
#7  QSortFilterProxyModelPrivate::_q_sourceRowsRemoved (this=0x4c1ae50, source_parent=..., start=2, end=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1422
#8  0x00007f7af6594f39 in QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:211
#9  0x00007f7af65f14f9 in QMetaObject::activate (sender=sender@entry=0x5686db0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffc42a90d10) at kernel/qobject.cpp:3740
#10 0x00007f7af65f1e17 in QMetaObject::activate (sender=sender@entry=0x5686db0, m=m@entry=0x7f7af6a0ee00 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffc42a90d10) at kernel/qobject.cpp:3602
#11 0x00007f7af6668fd4 in QAbstractItemModel::rowsRemoved (this=this@entry=0x5686db0, _t1=..., _t2=<optimized out>, _t3=<optimized out>) at .moc/moc_qabstractitemmodel.cpp:615
#12 0x00007f7af656e0eb in QAbstractItemModel::endRemoveRows (this=0x5686db0) at itemmodels/qabstractitemmodel.cpp:2715
#13 0x00007f7a3d6b1f66 in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved (this=<optimized out>, first=<optimized out>, last=3, parent=...) at /tmp/plasma-workspace/src/plasma-workspace-5.7.3/libtaskmanager/taskgroupingproxymodel.cpp:197
#14 0x00007f7a3d6b53fc in TaskManager::TaskGroupingProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /tmp/plasma-workspace/src/build/libtaskmanager/moc_taskgroupingproxymodel.cpp:152
#15 0x00007f7af65f14f9 in QMetaObject::activate (sender=sender@entry=0x56956d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffc42a91000) at kernel/qobject.cpp:3740
#16 0x00007f7af65f1e17 in QMetaObject::activate (sender=sender@entry=0x56956d0, m=m@entry=0x7f7af6a0ee00 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffc42a91000) at kernel/qobject.cpp:3602
#17 0x00007f7af6668f64 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x56956d0, _t1=..., _t2=<optimized out>, _t2@entry=3, _t3=<optimized out>, _t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#18 0x00007f7af656d993 in QAbstractItemModel::beginRemoveRows (this=0x56956d0, parent=..., first=3, last=3) at itemmodels/qabstractitemmodel.cpp:2698
#19 0x00007f7af6592685 in QSortFilterProxyModelPrivate::remove_proxy_interval (emit_signal=true, orient=Qt::Vertical, proxy_parent=..., proxy_end=3, proxy_start=3, proxy_to_source=..., source_to_proxy=..., this=0x556f250) at itemmodels/qsortfilterproxymodel.cpp:583
#20 QSortFilterProxyModelPrivate::remove_source_items (this=this@entry=0x556f250, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=orient@entry=Qt::Vertical, emit_signal=true) at itemmodels/qsortfilterproxymodel.cpp:565
#21 0x00007f7af6592884 in QSortFilterProxyModelPrivate::source_items_about_to_be_removed (this=0x556f250, source_parent=..., start=6, end=6, orient=orient@entry=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:866
#22 0x00007f7af6594f18 in QSortFilterProxyModelPrivate::_q_sourceRowsAboutToBeRemoved (end=<optimized out>, start=<optimized out>, source_parent=..., this=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1415
#23 QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:210
#24 0x00007f7af65f14f9 in QMetaObject::activate (sender=sender@entry=0x5695900, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffc42a91350) at kernel/qobject.cpp:3740
#25 0x00007f7af65f1e17 in QMetaObject::activate (sender=sender@entry=0x5695900, m=m@entry=0x7f7af6a0ee00 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffc42a91350) at kernel/qobject.cpp:3602
#26 0x00007f7af6668f64 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x5695900, _t1=..., _t2=<optimized out>, _t2@entry=6, _t3=<optimized out>, _t3@entry=6) at .moc/moc_qabstractitemmodel.cpp:608
#27 0x00007f7af656d993 in QAbstractItemModel::beginRemoveRows (this=0x5695900, parent=..., first=6, last=6) at itemmodels/qabstractitemmodel.cpp:2698
#28 0x00007f7a3f1069d5 in KConcatenateRowsProxyModelPrivate::slotRowsAboutToBeRemoved (this=0x5695960, start=6, end=6) at /tmp/kitemmodels/src/kitemmodels-5.25.0/src/kconcatenaterowsproxymodel.cpp:241
#29 0x00007f7a3f1086f4 in KConcatenateRowsProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /tmp/kitemmodels/src/build/src/moc_kconcatenaterowsproxymodel.cpp:130
#30 0x00007f7af65f14f9 in QMetaObject::activate (sender=sender@entry=0x4c1a9e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffc42a915a0) at kernel/qobject.cpp:3740
#31 0x00007f7af65f1e17 in QMetaObject::activate (sender=sender@entry=0x4c1a9e0, m=m@entry=0x7f7af6a0ee00 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffc42a915a0) at kernel/qobject.cpp:3602
#32 0x00007f7af6668f64 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x4c1a9e0, _t1=..., _t2=<optimized out>, _t2@entry=6, _t3=<optimized out>, _t3@entry=6) at .moc/moc_qabstractitemmodel.cpp:608
#33 0x00007f7af656d993 in QAbstractItemModel::beginRemoveRows (this=0x4c1a9e0, parent=..., first=first@entry=6, last=last@entry=6) at itemmodels/qabstractitemmodel.cpp:2698
#34 0x00007f7a3d6cd2a3 in TaskManager::XWindowTasksModel::Private::removeWindow (this=0x4c1b5b0, window=<optimized out>) at /tmp/plasma-workspace/src/plasma-workspace-5.7.3/libtaskmanager/xwindowtasksmodel.cpp:253
#35 0x00007f7af65f186e in QtPrivate::QSlotObjectBase::call (a=0x7ffc42a917c0, r=0x4c1a9e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:130
#36 QMetaObject::activate (sender=0x7f7af947a180, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3723
#37 0x00007f7af926aa52 in KWindowSystem::windowRemoved(unsigned long long) () from /usr/lib/libKF5WindowSystem.so.5
#38 0x00007f7ade662685 in ?? () from /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#39 0x00007f7af92631c7 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () from /usr/lib/libKF5WindowSystem.so.5
#40 0x00007f7af926486c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () from /usr/lib/libKF5WindowSystem.so.5
#41 0x00007f7af9264b92 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () from /usr/lib/libKF5WindowSystem.so.5
#42 0x00007f7ade661bf6 in ?? () from /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#43 0x00007f7af65c322f in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x752b490, result=result@entry=0x7ffc42a91f48) at kernel/qabstracteventdispatcher.cpp:466
#44 0x00007f7ae7111c34 in QXcbConnection::handleXcbEvent (this=this@entry=0x231e560, event=event@entry=0x752b490) at qxcbconnection.cpp:1103
#45 0x00007f7ae71128c5 in QXcbConnection::processXcbEvents (this=0x231e560) at qxcbconnection.cpp:1735
#46 0x00007f7af65f2359 in QObject::event (this=0x231e560, e=<optimized out>) at kernel/qobject.cpp:1263
#47 0x00007f7af7530e3c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x231e560, e=0x7f7ad807b170) at kernel/qapplication.cpp:3799
#48 0x00007f7af75385b1 in QApplication::notify (this=0x7ffc42a927e0, receiver=0x231e560, e=0x7f7ad807b170) at kernel/qapplication.cpp:3556
#49 0x00007f7af65c5c90 in QCoreApplication::notifyInternal2 (receiver=0x231e560, event=event@entry=0x7f7ad807b170) at kernel/qcoreapplication.cpp:988
#50 0x00007f7af65c840d in QCoreApplication::sendEvent (event=0x7f7ad807b170, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#51 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x231cc50) at kernel/qcoreapplication.cpp:1649
#52 0x00007f7af65c8878 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#53 0x00007f7af661a183 in postEventSourceDispatch (s=0x2366e00) at kernel/qeventdispatcher_glib.cpp:276
#54 0x00007f7af0fa7dd7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#55 0x00007f7af0fa8040 in ?? () from /usr/lib/libglib-2.0.so.0
#56 0x00007f7af0fa80ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#57 0x00007f7af661a58f in QEventDispatcherGlib::processEvents (this=0x2371ea0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#58 0x00007f7af65c40ea in QEventLoop::exec (this=this@entry=0x7ffc42a92590, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#59 0x00007f7af65cc5dc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#60 0x00007f7af6b0b9bc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1639
#61 0x00007f7af7530d95 in QApplication::exec () at kernel/qapplication.cpp:2975
#62 0x000000000041b91c in main (argc=<optimized out>, argv=<optimized out>) at /tmp/plasma-workspace/src/plasma-workspace-5.7.3/shell/main.cpp:166