Application: plasmashell (5.10.5)

Qt Version: 5.7.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.9-200.fc26.x86_64 x86_64
Distribution: "Fedora release 26 (Twenty Six)"

-- Information about the crash:
This happens occasionally. After crash I'm able to restore desktop by starting plasmashell (via alt-f2) and it always starts OK.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc634c9d4c0 (LWP 1364))]

Thread 5 (Thread 0x7fc60eb6a700 (LWP 1719)):
#0  0x00007fc63ff4590b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fc6474d7534 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007fc6474d7579 in  () at /lib64/libQt5Script.so.5
#3  0x00007fc63ff3f36d in start_thread () at /lib64/libpthread.so.0
#4  0x00007fc640c02e1f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fc61dd94700 (LWP 1590)):
#0  0x00007fc6399954c4 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007fc639950526 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fc63995067c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fc641a12e6b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fc6419c360a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fc64181b99a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fc644a859b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007fc64181fc9e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007fc63ff3f36d in start_thread () at /lib64/libpthread.so.0
#9  0x00007fc640c02e1f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fc61f5ef700 (LWP 1532)):
#0  0x00007fc640bf6d2d in poll () at /lib64/libc.so.6
#1  0x00007fc639950569 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fc63995067c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fc641a12e6b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fc6419c360a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fc64181b99a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fc644a859b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007fc64181fc9e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007fc63ff3f36d in start_thread () at /lib64/libpthread.so.0
#9  0x00007fc640c02e1f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fc634c96700 (LWP 1418)):
#0  0x00007fc640bf6d2d in poll () at /lib64/libc.so.6
#1  0x00007fc639950569 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fc63995067c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fc641a12e6b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fc6419c360a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fc64181b99a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fc641c1ea39 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007fc64181fc9e in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007fc63ff3f36d in start_thread () at /lib64/libpthread.so.0
#9  0x00007fc640c02e1f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fc634c9d4c0 (LWP 1364)):
[KCrash Handler]
#6  0x00007fc587ed02d0 in  ()
#7  0x00007fc64499ff68 in QV4::QmlBindingWrapper::call(QV4::Managed const*, QV4::CallData*) () at /lib64/libQt5Qml.so.5
#8  0x00007fc644a6a725 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /lib64/libQt5Qml.so.5
#9  0x00007fc644a6ac02 in QQmlJavaScriptExpression::evaluate(bool*) () at /lib64/libQt5Qml.so.5
#10 0x00007fc6449fda61 in QQmlExpressionPrivate::value(bool*) () at /lib64/libQt5Qml.so.5
#11 0x00007fc6449fdc51 in QQmlExpression::evaluate(bool*) () at /lib64/libQt5Qml.so.5
#12 0x00007fc6476069e6 in PlasmaQuick::AppletQuickItemPrivate::compactRepresentationCheck() () at /lib64/libKF5PlasmaQuick.so.5
#13 0x00007fc647607c12 in PlasmaQuick::AppletQuickItem::init() () at /lib64/libKF5PlasmaQuick.so.5
#14 0x00007fc61dda9914 in AppletInterface::init() () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#15 0x00007fc61ddb6373 in ContainmentInterface::init() () at /usr/lib64/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#16 0x00007fc647608fc8 in PlasmaQuick::AppletQuickItem::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () at /lib64/libKF5PlasmaQuick.so.5
#17 0x00007fc645492054 in QQuickItemPrivate::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () at /lib64/libQt5Quick.so.5
#18 0x00007fc6454973bc in QQuickItemPrivate::refWindow(QQuickWindow*) () at /lib64/libQt5Quick.so.5
#19 0x00007fc645498ca8 in QQuickItem::setParentItem(QQuickItem*) () at /lib64/libQt5Quick.so.5
#20 0x00007fc647617c43 in PlasmaQuick::ContainmentViewPrivate::setContainment(Plasma::Containment*) () at /lib64/libKF5PlasmaQuick.so.5
#21 0x0000556b563cdb5e in ShellCorona::addOutput(QScreen*) ()
#22 0x0000556b563d6bf7 in ShellCorona::load() [clone .part.427] ()
#23 0x00007fc6419ebb97 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#24 0x00007fc646e4ef31 in KActivities::Consumer::serviceStatusChanged(KActivities::Consumer::ServiceStatus) () at /lib64/libKF5Activities.so.5
#25 0x00007fc646e5068b in KActivities::Consumer::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libKF5Activities.so.5
#26 0x00007fc6419eba73 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#27 0x00007fc646e4edf1 in KActivities::ActivitiesCache::serviceStatusChanged(KActivities::Consumer::ServiceStatus) () at /lib64/libKF5Activities.so.5
#28 0x00007fc646e47e2d in KActivities::ActivitiesCache::setAllActivities(QList<ActivityInfo> const&) () at /lib64/libKF5Activities.so.5
#29 0x00007fc646e47fed in KActivities::ActivitiesCache::setAllActivitiesFromReply(QDBusPendingCallWatcher*) () at /lib64/libKF5Activities.so.5
#30 0x00007fc646e50124 in KActivities::ActivitiesCache::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libKF5Activities.so.5
#31 0x00007fc6419eba73 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#32 0x00007fc641c73baf in QDBusPendingCallWatcher::finished(QDBusPendingCallWatcher*) () at /lib64/libQt5DBus.so.5
#33 0x00007fc6419ec8da in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#34 0x00007fc64229a5dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#35 0x00007fc6422a1c74 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#36 0x00007fc6419c4627 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#37 0x00007fc6419c685b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#38 0x00007fc641a12dd3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#39 0x00007fc639950247 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#40 0x00007fc6399505e8 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#41 0x00007fc63995067c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#42 0x00007fc641a12e4f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#43 0x00007fc6419c360a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#44 0x00007fc6419cb27c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#45 0x0000556b563ad3b2 in main ()

Reported using DrKonqi