#10 0x00007faad9093688 in qt_assert (assertion=0x4bc4c8 "containment", file=0x4bc048 "/home/arjun/kde5-src/kde/workspace/plasma-workspace/shell/shellcorona.cpp", line=690) at global/qglobal.cpp:2127
#11 0x0000000000481a97 in ShellCorona::addOutput (this=0x14fcb80, output=0x19050b0) at /home/arjun/kde5-src/kde/workspace/plasma-workspace/shell/shellcorona.cpp:690
#12 0x000000000047ea33 in ShellCorona::load (this=0x14fcb80) at /home/arjun/kde5-src/kde/workspace/plasma-workspace/shell/shellcorona.cpp:321
#13 0x0000000000485971 in ShellCorona::qt_static_metacall (_o=0x14fcb80, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0x7fff6db2b880) at /home/arjun/kde5-build/kde/workspace/plasma-workspace/shell/moc_shellcorona.cpp:247
#14 0x00007faad930ff6c in QMetaObject::activate (sender=0x14fd250, signalOffset=3, local_signal_index=1, argv=0x7fff6db2b880) at kernel/qobject.cpp:3680
#15 0x00007faad930f77a in QMetaObject::activate (sender=0x14fd250, m=0x7faade815600 <KActivities::Consumer::staticMetaObject>, local_signal_index=1, argv=0x7fff6db2b880) at kernel/qobject.cpp:3546
#16 0x00007faade600618 in KActivities::Consumer::serviceStatusChanged (this=0x14fd250, _t1=KActivities::Consumer::Running) at /home/arjun/kde5-build/frameworks/kactivities/src/lib/core/moc_consumer.cpp:222
#17 0x00007faade600197 in KActivities::Consumer::qt_static_metacall (_o=0x14fd250, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fff6db2ba80) at /home/arjun/kde5-build/frameworks/kactivities/src/lib/core/moc_consumer.cpp:103
#18 0x00007faad930ff6c in QMetaObject::activate (sender=0x15011c0, signalOffset=3, local_signal_index=7, argv=0x7fff6db2ba80) at kernel/qobject.cpp:3680
#19 0x00007faad930f77a in QMetaObject::activate (sender=0x15011c0, m=0x7faade8155c0 <KActivities::ActivitiesCache::staticMetaObject>, local_signal_index=7, argv=0x7fff6db2ba80) at kernel/qobject.cpp:3546
#20 0x00007faade6000dc in KActivities::ActivitiesCache::serviceStatusChanged (this=0x15011c0, _t1=KActivities::Consumer::Running) at /home/arjun/kde5-build/frameworks/kactivities/src/lib/core/moc_activitiescache_p.cpp:380
#21 0x00007faade5f7d8a in KActivities::ActivitiesCache::setAllActivities (this=0x15011c0, _activities=...) at /home/arjun/kde5-src/frameworks/kactivities/src/lib/core/activitiescache_p.cpp:283
#22 0x00007faade5f8beb in KActivities::ActivitiesCache::passInfoFromReply<QList<ActivityInfo>, void (KActivities::ActivitiesCache::*)(QList<ActivityInfo> const&)> (this=0x15011c0, watcher=0x1500420, f=(void (KActivities::ActivitiesCache::*)(KActivities::ActivitiesCache * const, const QList<ActivityInfo> &)) 0x7faade5f7c42 <KActivities::ActivitiesCache::setAllActivities(QList<ActivityInfo> const&)>) at /home/arjun/kde5-src/frameworks/kactivities/src/lib/core/activitiescache_p.cpp:193
#23 0x00007faade5f770f in KActivities::ActivitiesCache::setAllActivitiesFromReply (this=0x15011c0, watcher=0x1500420) at /home/arjun/kde5-src/frameworks/kactivities/src/lib/core/activitiescache_p.cpp:208
#24 0x00007faade5ff8e5 in KActivities::ActivitiesCache::qt_static_metacall (_o=0x15011c0, _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0x7fff6db2bda0) at /home/arjun/kde5-build/frameworks/kactivities/src/lib/core/moc_activitiescache_p.cpp:182
#25 0x00007faad930ff6c in QMetaObject::activate (sender=0x1500420, signalOffset=3, local_signal_index=0, argv=0x7fff6db2bda0) at kernel/qobject.cpp:3680
#26 0x00007faad930f77a in QMetaObject::activate (sender=0x1500420, m=0x7faae07634a0 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=0, argv=0x7fff6db2bda0) at kernel/qobject.cpp:3546
#27 0x00007faae052e77b in QDBusPendingCallWatcher::finished (this=0x1500420, _t1=0x1500420) at .moc/moc_qdbuspendingcall.cpp:146
#28 0x00007faae052e7f7 in QDBusPendingCallWatcherPrivate::_q_finished (this=0x1500160) at qdbuspendingcall.cpp:495
#29 0x00007faae052e53b in QDBusPendingCallWatcher::qt_static_metacall (_o=0x1500420, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x1689e60) at .moc/moc_qdbuspendingcall.cpp:78
#30 0x00007faad930855d in QMetaCallEvent::placeMetaCall (this=0x169e670, object=0x1500420) at kernel/qobject.cpp:487
#31 0x00007faad93095a4 in QObject::event (this=0x1500420, e=0x169e670) at kernel/qobject.cpp:1241
#32 0x00007faada12f538 in QApplicationPrivate::notify_helper (this=0x13fd800, receiver=0x1500420, e=0x169e670) at kernel/qapplication.cpp:3501
#33 0x00007faada12ccca in QApplication::notify (this=0x7fff6db2cd10, receiver=0x1500420, e=0x169e670) at kernel/qapplication.cpp:2954
#34 0x00007faad92cd9ea in QCoreApplication::notifyInternal (this=0x7fff6db2cd10, receiver=0x1500420, event=0x169e670) at kernel/qcoreapplication.cpp:935
#35 0x00007faad92d16d3 in QCoreApplication::sendEvent (receiver=0x1500420, event=0x169e670) at ../../include/QtCore/qcoreapplication.h:237
#36 0x00007faad92ced47 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x13f3280) at kernel/qcoreapplication.cpp:1539
#37 0x00007faad92ce6f8 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1397
#38 0x00007faad9344e30 in postEventSourceDispatch (s=0x1442c10) at kernel/qeventdispatcher_glib.cpp:279
#39 0x000000334ea492a6 in g_main_dispatch (context=0x7faac8002e00) at gmain.c:3066
#40 g_main_context_dispatch (context=context@entry=0x7faac8002e00) at gmain.c:3642
#41 0x000000334ea49628 in g_main_context_iterate (context=context@entry=0x7faac8002e00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3713
#42 0x000000334ea496dc in g_main_context_iteration (context=0x7faac8002e00, may_block=1) at gmain.c:3774
#43 0x00007faad93455d1 in QEventDispatcherGlib::processEvents (this=0x1430ee0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#44 0x00007faad069dfca in QPAEventDispatcherGlib::processEvents (this=0x1430ee0, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:123
#45 0x00007faad92ca69e in QEventLoop::processEvents (this=0x7fff6db2cbb0, flags=...) at kernel/qeventloop.cpp:136
#46 0x00007faad92ca981 in QEventLoop::exec (this=0x7fff6db2cbb0, flags=...) at kernel/qeventloop.cpp:212
#47 0x00007faad92ce0d3 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#48 0x00007faad98aa486 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1446
#49 0x00007faada12c4f7 in QApplication::exec () at kernel/qapplication.cpp:2746
#50 0x0000000000460ae5 in main (argc=2, argv=0x7fff6db2d178) at /home/arjun/kde5-src/kde/workspace/plasma-workspace/shell/main.cpp:109


Reproducible: Always

Steps to Reproduce:
1. Connect external monitor
2. Login