Hmm not much to do unfortunately ... the backtrace is quite non-descript and also doesn't have line numbers, so it's impossible to tell what's going on. I need better steps to reproduce or a better BT, sorry.

is this better?

Thread 1 (Thread 0x7f35202b77c0 (LWP 1942)):
[KCrash Handler]
#5  0x00007f351d68b809 in  () at /usr/lib64/libQt5Qml.so.5
#6  0x00007f351d8ddcb9 in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f351d8e3401 in QQmlDelegateModel::_q_layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f351d9041df in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007f351d9046bf in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007f351a84c7c1 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x51abc70, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fffd6a28260) at kernel/qobject.cpp:3731
#11 0x00007f351a84cce7 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x51abc70, m=m@entry=0x7f351ac57e20 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fffd6a28260) at kernel/qobject.cpp:3582
#12 0x00007f351a8c78a6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) (this=this@entry=0x51abc70, _t1=..., _t2=_t2@entry=QAbstractItemModel::VerticalSortHint) at .moc/moc_qabstractitemmodel.cpp:407
#13 0x00007f351a7eb9e2 in QSortFilterProxyModelPrivate::_q_sourceDataChanged(QModelIndex const&, QModelIndex const&) (this=0x519c360, source_top_left=..., source_bottom_right=...) at itemmodels/qsortfilterproxymodel.cpp:1201
#14 0x00007f351a84c6c1 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x51ce3f0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd6a28570) at kernel/qobject.cpp:3716
#15 0x00007f351a84cce7 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f351ac57e20 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd6a28570) at kernel/qobject.cpp:3582
#16 0x00007f351a8c77fc in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:393
#17 0x00007f34186271a3 in TaskManager::TasksModelPrivate::itemChanged(QFlags<TaskManager::TaskChange>) (this=0x51d2040, changes=...) at /usr/src/debug/plasma-workspace-5.1.95git/libtaskmanager/tasksmodel.cpp:515
#18 0x00007f3418627ac7 in TaskManager::TasksModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7fffd6a28770) at /usr/src/debug/plasma-workspace-5.1.95git/build/libtaskmanager/moc_tasksmodel.cpp:213
#19 0x00007f351a84c6c1 in QMetaObject::activate(QObject*, int, int, void**) (sender=0xb119a60, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd6a28770) at kernel/qobject.cpp:3716
#20 0x00007f351a84cce7 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f341884b9c0 <TaskManager::AbstractGroupableItem::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd6a28770) at kernel/qobject.cpp:3582
#21 0x00007f341862f4e8 in TaskManager::AbstractGroupableItem::changed(QFlags<TaskManager::TaskChange>) (this=<optimized out>, _t1=...) at /usr/src/debug/plasma-workspace-5.1.95git/build/libtaskmanager/moc_abstractgroupableitem.cpp:222
#22 0x00007f34186301fb in TaskManager::AbstractGroupableItem::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/plasma-workspace-5.1.95git/build/libtaskmanager/moc_abstractgroupableitem.cpp:134
#23 0x00007f351a84c6c1 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x7b0e0b0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd6a28920) at kernel/qobject.cpp:3716
#24 0x00007f351a84cce7 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x7b0e0b0, m=m@entry=0x7f341884b6c0 <TaskManager::Task::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd6a28920) at kernel/qobject.cpp:3582
#25 0x00007f341862f618 in TaskManager::Task::changed(QFlags<TaskManager::TaskChange>) (this=this@entry=0x7b0e0b0, _t1=...) at /usr/src/debug/plasma-workspace-5.1.95git/build/libtaskmanager/moc_task.cpp:354
#26 0x00007f3418611816 in TaskManager::Task::setActive(bool) (this=this@entry=0x7b0e0b0, a=a@entry=true) at /usr/src/debug/plasma-workspace-5.1.95git/libtaskmanager/task.cpp:178
#27 0x00007f341862319c in TaskManager::TaskManager::activeWindowChanged(unsigned long long) (this=0x7f341884cf80 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, w=<optimized out>) at /usr/src/debug/plasma-workspace-5.1.95git/libtaskmanager/taskmanager.cpp:412
#28 0x00007f341862519c in TaskManager::TaskManager::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/plasma-workspace-5.1.95git/build/libtaskmanager/moc_taskmanager.cpp:175
#29 0x00007f351a84c6c1 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x7f351d3699f0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd6a28b10) at kernel/qobject.cpp:3716
#30 0x00007f351d1593d2 in KWindowSystem::activeWindowChanged(unsigned long long) () at /usr/lib64/libKF5WindowSystem.so.5
#31 0x00007f351d143df4 in  () at /usr/lib64/libKF5WindowSystem.so.5
#32 0x00007f351a81a010 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (this=<optimized out>, eventType=..., message=0x7f3504010c90, result=0x7fffd6a28c78) at kernel/qabstracteventdispatcher.cpp:460
#33 0x00007f350c43cc2d in  () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#34 0x00007f350c43dfeb in  () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#35 0x00007f351a84d4c6 in QObject::event(QEvent*) (this=0x19be990, e=<optimized out>) at kernel/qobject.cpp:1245
#36 0x00007f351bb71b5c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x19b0750, receiver=receiver@entry=0x19be990, e=e@entry=0x7f350400a290) at kernel/qapplication.cpp:3722
#37 0x00007f351bb76bc0 in QApplication::notify(QObject*, QEvent*) (this=0x7fffd6a29550, receiver=0x19be990, e=0x7f350400a290) at kernel/qapplication.cpp:3505
#38 0x00007f351a81ce45 in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7fffd6a29550, receiver=0x19be990, event=event@entry=0x7f350400a290) at kernel/qcoreapplication.cpp:930
#39 0x00007f351a81ecdf in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x7f350400a290, receiver=<optimized out>) at kernel/qcoreapplication.h:228
#40 0x00007f351a81ecdf in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x19a5570) at kernel/qcoreapplication.cpp:1534
#41 0x00007f351a81f318 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1392
#42 0x00007f351a874d13 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x1a004b0) at kernel/qeventdispatcher_glib.cpp:271
#43 0x00007f351629acb4 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#44 0x00007f351629af08 in  () at /usr/lib64/libglib-2.0.so.0
#45 0x00007f351629afac in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#46 0x00007f351a87418c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x19e6580, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#47 0x00007f351a81ad9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffd6a293e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#48 0x00007f351a822426 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1183
#49 0x0000000000432144 in main ()

just changed the status and the version (the rpm says 5.1.95)

Yes, that's much better backtrace, thank you.

Can you also add what application specifically can trigger this crash so we can try to reproduce? Or is it any application?

no, it's totally random. Once it was triggered by closing tabs in firefox, another time it happened when I was deleting mails, etc. You can't really say.

ahh, and it's not just closing applications as the title suggests.

*** Bug 342975 has been marked as a duplicate of this bug. ***

*** Bug 344695 has been marked as a duplicate of this bug. ***

*** Bug 344721 has been marked as a duplicate of this bug. ***

*** Bug 345063 has been marked as a duplicate of this bug. ***

*** Bug 345289 has been marked as a duplicate of this bug. ***

In my case, one way to reproduce the crash is usually by starting Firefox with a URL, with one of two ways. Either start Firefox on the CLI: "firefox http://someurl" or click on a link inside of the Quassel client, in a IRC chat window.

Clicking a link only has a 30% chance of causing a crash, while the CLI option seem to be even less easy to reproduce. Maybe these are clues.

The crash happens randomly and the symptoms aren't always the same:
- sometimes plasmashell doesn't come back and I need to use krunner to bring it back
- sometimes plasmashell comes back (and only the task bar is gone)
- sometimes the whole desktop disappears and only the wallpaper stays, until plasmashell restarts automatically
- and in only some of these cases does the crash handler appears, not always

Here is the backtrace of my last crash (I'll try and get line numbers the next time):

Application: plasmashell (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa2e1f737c0 (LWP 23023))]

Thread 30 (Thread 0x7fa2cc40e700 (LWP 23024)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2e08a1322 in  () at /usr/lib64/libxcb.so.1
#2  0x00007fa2e08a2def in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007fa2ce78ecd9 in  () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#4  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 29 (Thread 0x7fa2c9ebc700 (LWP 23025)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 28 (Thread 0x7fa2b8b27700 (LWP 23026)):
#0  0x00007fa2dc31eb80 in clock_gettime@plt () at /usr/lib64/libQt5Core.so.5
#1  0x00007fa2dc3f8aa6 in  () at /usr/lib64/libQt5Core.so.5
#2  0x00007fa2dc576749 in QTimerInfoList::updateCurrentTime() () at /usr/lib64/libQt5Core.so.5
#3  0x00007fa2dc576cd5 in QTimerInfoList::timerWait(timespec&) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc577eee in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2d81c228d in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#6  0x00007fa2d81c2b03 in  () at /usr/lib64/libglib-2.0.so.0
#7  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#8  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#10 0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#11 0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#12 0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#13 0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#14 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 27 (Thread 0x7fa2b29bb700 (LWP 23030)):
#0  0x00007fa2d8204904 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2a9d in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 26 (Thread 0x7fa2b19ba700 (LWP 23031)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 25 (Thread 0x7fa2b0909700 (LWP 23032)):
#0  0x00007fa2dc577ec9 in  () at /usr/lib64/libQt5Core.so.5
#1  0x00007fa2d81c228d in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2b03 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 24 (Thread 0x7fa2a37ff700 (LWP 23033)):
#0  0x00007fa2dbcd259d in read () at /lib64/libc.so.6
#1  0x00007fa2d8203750 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2714 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2b7b in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 23 (Thread 0x7fa2a271e700 (LWP 23034)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 22 (Thread 0x7fa2a162d700 (LWP 23035)):
#0  0x00007fa2d82048e9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2bca in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 21 (Thread 0x7fa28ffff700 (LWP 23036)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 20 (Thread 0x7fa28effe700 (LWP 23037)):
#0  0x00007fa2d82048e9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c1cb0 in g_main_context_acquire () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2aa5 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 19 (Thread 0x7fa28dbcc700 (LWP 23038)):
#0  0x00007fa2dbceae80 in __libc_disable_asynccancel () at /lib64/libc.so.6
#1  0x00007fa2dbcd25a9 in read () at /lib64/libc.so.6
#2  0x00007fa2d8203750 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2714 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2d81c2b7b in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#6  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#10 0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#11 0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#12 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7fa28c9c3700 (LWP 23039)):
#0  0x00007fa2d8204904 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2b91 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7fa27f7ff700 (LWP 23040)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7fa27e7fe700 (LWP 23041)):
#0  0x00007fa2db2dc94f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fa2e169b47b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007fa2e169b4a9 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7fa27defd700 (LWP 23042)):
#0  0x00007fa2d82048e9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2299 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2b03 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7fa1f3fff700 (LWP 23043)):
#0  0x00007fa2d81bffcf in  () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c25bb in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2b7b in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7fa1f274b700 (LWP 23044)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df9eee12 in  () at /usr/lib64/libQt5Quick.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7fa1e77ff700 (LWP 23045)):
#0  0x00007fa2dc576cc2 in QTimerInfoList::timerWait(timespec&) () at /usr/lib64/libQt5Core.so.5
#1  0x00007fa2dc577eee in  () at /usr/lib64/libQt5Core.so.5
#2  0x00007fa2d81c228d in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2b03 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7fa1dbbcd700 (LWP 23047)):
#0  0x00007fa2d8204904 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2bd9 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7fa1dab7c700 (LWP 23048)):
#0  0x00007fa2dbcd259d in read () at /lib64/libc.so.6
#1  0x00007fa2d8203750 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2714 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2b7b in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7fa1d9a8b700 (LWP 23049)):
#0  0x00007fa2d8204904 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2280 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2b03 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7fa1d899a700 (LWP 23050)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7fa1cb7ff700 (LWP 23051)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fa1ca7ae700 (LWP 23052)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fa1c96bd700 (LWP 23053)):
#0  0x00007fa2d82048e9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2299 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2b03 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fa1b7fff700 (LWP 23054)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fa1b5b70700 (LWP 23055)):
#0  0x00007fa2d8204904 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fa2d81c2659 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2b7b in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fa1b4a7d700 (LWP 23056)):
#0  0x00007fa2dbcd64cd in poll () at /lib64/libc.so.6
#1  0x00007fa2d81c2be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fa2dc57811b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fa2dc341cea in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2df59acc8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fa2dc34691f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fa2db2d84b4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa2dbcdea4d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fa2e1f737c0 (LWP 23023)):
[KCrash Handler]
#5  0x00007fa2dc4d38f9 in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007fa2dc4ce9d8 in QAbstractItemModel::endRemoveRows() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fa1e4b4ca8c in  () at /usr/lib64/libtaskmanager.so.5
#8  0x00007fa2dc550641 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#9  0x00007fa1e4b3ec72 in TaskManager::TaskGroup::itemRemoved(TaskManager::AbstractGroupableItem*) () at /usr/lib64/libtaskmanager.so.5
#10 0x00007fa1e4b3f633 in TaskManager::TaskGroup::Private::signalRemovals() () at /usr/lib64/libtaskmanager.so.5
#11 0x00007fa1e4b40ef1 in  () at /usr/lib64/libtaskmanager.so.5
#12 0x00007fa2dc551446 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#13 0x00007fa2dd8731dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#14 0x00007fa2dd8781f0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#15 0x00007fa2dc520dc5 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#16 0x00007fa2dc522c5f in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#17 0x00007fa2dc578c83 in  () at /usr/lib64/libQt5Core.so.5
#18 0x00007fa2d81c2a04 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#19 0x00007fa2d81c2c48 in  () at /usr/lib64/libglib-2.0.so.0
#20 0x00007fa2d81c2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#21 0x00007fa2dc5780fc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#22 0x00007fa2dc51ed1b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#23 0x00007fa2dc5263a6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#24 0x0000000000432324 in main ()

Created attachment 91625 [details]
Plasma crash debug log

I attached the debug log which I got by running plasmashell in Konsole and retriggering the crash.

Also this is my version from openSUSE Factory:
plasma5-workspace-5.2.1-45.1.x86_64

I have several apps/plasmoids loaded: system monitor, battery, kmix, fcitx (the input method), klipper, korganizer reminder daemon, kopete, networks (possibly wicked)
Also I had quassel running which also has a systray icon (and quassel crashes when plasmashell crashes).

One idea would be to disable those apps/plasmoids one by one and try and retrigger the bug to see if they're related.

Could it be a bug in the task manager ? 

See:
Thread 1 (Thread 0x7fa2e1f737c0 (LWP 23023)): [KCrash Handler] #5 0x00007fa2dc4d38f9 in () at /usr/lib64/libQt5Core.so.5 #6 0x00007fa2dc4ce9d8 in QAbstractItemModel::endRemoveRows() () at /usr/lib64/libQt5Core.so.5 #7 0x00007fa1e4b4ca8c in () at /usr/lib64/libtaskmanager.so.5 #8 0x00007fa2dc550641 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5 #9 0x00007fa1e4b3ec72 in TaskManager::TaskGroup::itemRemoved(TaskManager::AbstractGroupableItem*) () at /usr/lib64/libtaskmanager.so.5 #10 0x00007fa1e4b3f633 in TaskManager::TaskGroup::Private::signalRemovals() () at /usr/lib64/libtaskmanager.so.5

Some actions would cause entries in the task bar to be added/deleted. In the case of starting Firefox, it would add a temporary entry (startup notification with the bouncy icon) and then replace it with the real app ?

It looks like in Michi's backtrace there is also mention of the task manager (search for "task").
That was in Plasma 5.1.95. Maybe the bug has evolved in 5.2.1 and it now in another location of the task manager, see my backtrace.



Ahhh... I think I'm getting closer to something.

My taskbar is configured with the option to only show apps from the current desktop.
This means that when I furiously switch desktops, sometimes the task bar's entries do not reflect the current desktop yet. At this point, if I click on a link, plasma will crash.

Okay, I'm now able to reproduce the crash consistently, here are my steps:

1. Setup multiple virtual desktops
2. Configure thet taskbar to only show entries from the current desktop
3. Start Firefox on desktop 2
4. Start Quassel on desktop 3
5. Switch to desktop 3
6. Click on a link in any chat window: at this point Firefox starts and you see the bouncy icon and taskbar entry. The desktop will automatically switch to desktop 2 where Firefox is
7. Switch back to desktop 3
8. Click on the same link again, wait for the automatic desktop switch to Firefox
9. Switch back to desktop 3 and observe the taskbar: the taskbar keeps the Firefox entry for a second, then plasma crashes

I tried to wait a little longer while switching desktops, but the crash still happens.
I even tried to wait until the bouncy icon is gone, it still happened. Weird.

And just now it also crashes after I clicked the link.

I think it's related to "desktop switching" + "taskbar contents update" + "starting an app / startup notification"

Okay, I went to "systemsettings" => "Applications" => "Launch feedback", then disable "Enable taskbar notification".

I haven't been able to make it crash any more.

Can you guys try the same ? That would confirm my theory :-)

^ Thank you for all the detective work, that looks very useful. I'll take a stab at reproducing locally and fixing the crash soon.

Could you add some info on how your default web browser is set up and your Firefox is started? I can't get a startup notification for Firefox when it's already running (which is how it should be) so I need to figure out why that happens for you.

Created attachment 91640 [details]
attachment-23077-0.html

Hi,
It wasn't me with the firefox problem (I use chrome). I found at the time
it was any app.

On 19 March 2015 at 22:22, Eike Hein <hein@kde.org> wrote:

> https://bugs.kde.org/show_bug.cgi?id=342763
>
> --- Comment #19 from Eike Hein <hein@kde.org> ---
> Could you add some info on how your default web browser is set up and your
> Firefox is started? I can't get a startup notification for Firefox when
> it's
> already running (which is how it should be) so I need to figure out why
> that
> happens for you.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
>

I checked the "Default applications" settings, but it only has "firefox" as command (without extra args).

I find that if I start "firefox http://someurl" from Konsole, there is no startup notification.
However if I click on a link inside Quassel or thunderbird, it will trigger the startup notification. Not sure why.
Any idea where else I could look ?

I found that if I open a URL with "xdg-open http://theurl" it will show the startup notification.

Maybe some apps like Quassel (or Qt?) will open the browser using this method, as it will use the browser that was configured by default.

I hope you'll now be able to reproduce the issue consistently :-)

Created attachment 92011 [details]
backtrace information

Same here, I created another panel on the top. I started to add widgets to the top panel (my default panel is on the left). I added analog clock, fuzzy clock, system tray, task manager, IM contacts, window list. After adjusting the settings of the task manager (disabling 'only when task manager is full') and adjusting the height of the top panel, plasmashell crashed.
I could reproduce this twice.
This is not happening if I'm adjusting the left panel.

*** Bug 344224 has been marked as a duplicate of this bug. ***

*** Bug 347056 has been marked as a duplicate of this bug. ***

This started to happen to me after adding "Window List" as additional task manager widget to my panel. My "main" task manager is the icon task manager.

Plasma 5.3, Kubuntu 15.04 Backports PPA

Created attachment 92379 [details]
Crash log with Plasma 5.3

Configuration: 2 task managers in panel: Icon tasks + Window list
Icon tasks only shows tasks in current workspace and activity (but I don't use activities)

Opened another Firefox window, switched to another workspace, switched back and closed the Firefox window

*** Bug 347116 has been marked as a duplicate of this bug. ***

*** Bug 347172 has been marked as a duplicate of this bug. ***

*** Bug 347215 has been marked as a duplicate of this bug. ***

*** Bug 347216 has been marked as a duplicate of this bug. ***

*** Bug 347446 has been marked as a duplicate of this bug. ***

*** Bug 347408 has been marked as a duplicate of this bug. ***

Created attachment 92524 [details]
another crashlog

*** Bug 347838 has been marked as a duplicate of this bug. ***

*** Bug 347911 has been marked as a duplicate of this bug. ***

FWIW: This crash is actually not happening via the Task Manager applet but via the Window List applet. If you want to avoid it, remove Window List for now.

Fixed by http://commits.kde.org/plasma-desktop/ccc5076833ec27e8d94b323d86e87d16c0082e49 + http://commits.kde.org/plasma-workspace/a9a35ac2778f737214493435d6f81223c401f8d4

*** Bug 347925 has been marked as a duplicate of this bug. ***

Renaming to give people a hint how to avoid.

*** Bug 348009 has been marked as a duplicate of this bug. ***

*** Bug 348045 has been marked as a duplicate of this bug. ***

*** Bug 348055 has been marked as a duplicate of this bug. ***

*** Bug 348135 has been marked as a duplicate of this bug. ***

Crash after update.

*** Bug 348168 has been marked as a duplicate of this bug. ***

*** Bug 348204 has been marked as a duplicate of this bug. ***

*** Bug 348222 has been marked as a duplicate of this bug. ***

I have turned off both window list and the icon task manager, and am still seeing frequent plasma crashes. They do seem to be related to the opening and/or closing of windows (even dialogue boxes).

Application: plasmashell (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-18-generic x86_64
Distribution: Ubuntu 15.04

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f923a04c7c0 (LWP 2297))]

Thread 53 (Thread 0x7f9225dd9700 (LWP 2299)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9237377b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f923737964f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f9228120099 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92346916aa in start_thread (arg=0x7f9225dd9700) at pthread_create.c:333
#6  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 52 (Thread 0x7f921fe90700 (LWP 2307)):
#0  0x00007f9235461370 in __tls_get_addr@plt () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f923548aa12 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f92357221ba in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f92315163fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f92346916aa in start_thread (arg=0x7f921fe90700) at pthread_create.c:333
#12 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 51 (Thread 0x7f9214ab7700 (LWP 2308)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f92315168b9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f9214ab7700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 50 (Thread 0x7f920e18d700 (LWP 2312)):
#0  0x00007f923155b249 in g_private_get () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f923153de00 in g_thread_self () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fbd in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f920e18d700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 49 (Thread 0x7f920d18c700 (LWP 2313)):
#0  0x00007f9231516729 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f920d18c700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 48 (Thread 0x7f91fffff700 (LWP 2314)):
#0  0x00007f9231516862 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91fffff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 47 (Thread 0x7f91feffe700 (LWP 2315)):
#0  0x00007f9234e0649d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f923155a2f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f923151696c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f91feffe700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 46 (Thread 0x7f91fdf5d700 (LWP 2316)):
#0  0x00007f92315166e3 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91fdf5d700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 45 (Thread 0x7f91fce5c700 (LWP 2319)):
#0  0x00007f9231513eb7 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f923151639b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f91fce5c700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 44 (Thread 0x7f91ef7ff700 (LWP 2322)):
#0  0x00007f9231516842 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91ef7ff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 43 (Thread 0x7f91ee7fe700 (LWP 2323)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516852 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f91ee7fe700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 42 (Thread 0x7f91ed7fd700 (LWP 2325)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91ed7fd700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 41 (Thread 0x7f91dbfff700 (LWP 2326)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91dbfff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 40 (Thread 0x7f91daffe700 (LWP 2327)):
#0  0x00007f9231513efe in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f92315167ef in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f91daffe700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 39 (Thread 0x7f91d9ffd700 (LWP 2328)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91d9ffd700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 38 (Thread 0x7f91d8ffc700 (LWP 2329)):
#0  0x00007f92315167bd in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91d8ffc700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 37 (Thread 0x7f91cb7ff700 (LWP 2330)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516d6d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91cb7ff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 36 (Thread 0x7f91ca7fe700 (LWP 2334)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91ca7fe700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 35 (Thread 0x7f91c97fd700 (LWP 2335)):
#0  0x00007f9235483e0f in QMutex::unlock() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f92357221ed in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f92315163fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f91c97fd700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 34 (Thread 0x7f91b7fff700 (LWP 2337)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91b7fff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 33 (Thread 0x7f91b6ffe700 (LWP 2338)):
#0  0x00007f92354839b2 in QMutex::lock() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f92357225a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f92315168c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f91b6ffe700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 32 (Thread 0x7f91b5ffd700 (LWP 2341)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91b5ffd700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 31 (Thread 0x7f91a77ff700 (LWP 2349)):
#0  0x00007f9231513ee8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f923151639b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f91a77ff700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 30 (Thread 0x7f91a67fe700 (LWP 2407)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9239195644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f9239195689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f92346916aa in start_thread (arg=0x7f91a67fe700) at pthread_create.c:333
#4  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 29 (Thread 0x7f91a5ffd700 (LWP 2408)):
#0  0x00007f9234e0649d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f923155a2f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f923151696c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f91a5ffd700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 28 (Thread 0x7f91a4ffc700 (LWP 2414)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516a2a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f91a4ffc700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 27 (Thread 0x7f91135f9700 (LWP 2416)):
#0  0x00007f9234e064ac in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f923155a2f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f923151696c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9239cfeb56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f91135f9700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (Thread 0x7f91b4ffc700 (LWP 2417)):
#0  0x00007f9231516620 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f91b4ffc700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7f9109339700 (LWP 2422)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231515e5e in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516d75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f9109339700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7f9103fff700 (LWP 2423)):
#0  0x00007f9231516862 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f9103fff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7f9102ffe700 (LWP 2424)):
#0  0x00007f92315168d8 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f9102ffe700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7f9101ffd700 (LWP 2425)):
#0  0x00007f9231516960 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f9101ffd700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7f9100f2c700 (LWP 2426)):
#0  0x00007f9231513eb0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f923151639b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f9100f2c700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f90f37ff700 (LWP 2427)):
#0  0x00007f9235722580 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f92315168c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f90f37ff700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f90f27fe700 (LWP 2428)):
#0  0x00007f923155b789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516409 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f90f27fe700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f90f17fd700 (LWP 2429)):
#0  0x00007f9234e0649d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f923155a2f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f923151696c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f90f17fd700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f90dffff700 (LWP 2430)):
#0  0x00007f92315163eb in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90dffff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f90deffe700 (LWP 2431)):
#0  __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:134
#1  0x00007f9235541cb6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f9235720639 in QTimerInfoList::updateCurrentTime() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f9235720ba5 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f923572203e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92315163fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f92346916aa in start_thread (arg=0x7f90deffe700) at pthread_create.c:333
#14 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f90ddffd700 (LWP 2432)):
#0  0x00007f923155b789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516a16 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f90ddffd700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f90dcffc700 (LWP 2433)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90dcffc700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f90cf7ff700 (LWP 2434)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516eb1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90cf7ff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f90ce7fe700 (LWP 2435)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90ce7fe700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f90c2596700 (LWP 2436)):
#0  0x00007f923155b780 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516dbd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f90cc8a4cf7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90c2596700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f90c164d700 (LWP 2437)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516490 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f90c164d700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f90b7fff700 (LWP 2438)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90b7fff700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f90b4a17700 (LWP 27883)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90b4a17700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f90ab7ff700 (LWP 16097)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f92315163f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f90ab7ff700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f90aa580700 (LWP 16100)):
#0  0x00007f923155b7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231516490 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f90aa580700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f90a9477700 (LWP 16101)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90a9477700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f9097fff700 (LWP 16104)):
#0  0x00007f9234e0649d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f923155a2f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f923151696c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9237214f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f92346916aa in start_thread (arg=0x7f9097fff700) at pthread_create.c:333
#11 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f9096ffe700 (LWP 16105)):
#0  0x00007f923155b789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9231515df0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516d75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9239cfeb56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f92346916aa in start_thread (arg=0x7f9096ffe700) at pthread_create.c:333
#10 0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f90967fd700 (LWP 16106)):
#0  0x00007f9234e0a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9231516ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9235722c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9235486b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9239cfeb56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f923548bb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f92346916aa in start_thread (arg=0x7f90967fd700) at pthread_create.c:333
#9  0x00007f9234e15eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f923a04c7c0 (LWP 2297)):
[KCrash Handler]
#6  0x00007f9236fedcd9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f923725b148 in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f9237260c61 in QQmlDelegateModel::_q_layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f9237282cff in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f923728340f in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f92356faae2 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f9235778226 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f923569a7e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f92356fa9c9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f923577813c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f9109cd4653 in TaskManager::TasksModelPrivate::itemChanged (this=0x65668a0, changes=...) at ../../libtaskmanager/tasksmodel.cpp:515
#17 0x00007f9109cd5067 in TaskManager::TasksModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7fff8366fa20) at ./moc_tasksmodel.cpp:213
#18 0x00007f92356fa9c9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f9109cdd028 in TaskManager::AbstractGroupableItem::changed (this=<optimized out>, _t1=...) at moc_abstractgroupableitem.cpp:222
#20 0x00007f9109cde45b in TaskManager::AbstractGroupableItem::qt_static_metacall (_o=0x82bf820, _c=27, _id=141857056, _a=0x1b) at moc_abstractgroupableitem.cpp:134
#21 0x00007f92356fa9c9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f9109cdd218 in TaskManager::Task::changed (this=this@entry=0x6550290, _t1=...) at moc_task.cpp:354
#23 0x00007f9109cbda8a in TaskManager::Task::setActive (this=0x6550290, a=<optimized out>) at ../../libtaskmanager/task.cpp:178
#24 0x00007f9109cd065c in TaskManager::TaskManager::activeWindowChanged (this=0x7f9109efaf90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, w=<optimized out>) at ../../libtaskmanager/taskmanager.cpp:412
#25 0x00007f9109cd29d9 in TaskManager::TaskManager::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskmanager.cpp:175
#26 0x00007f92356fa9c9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f92399ec2f2 in KWindowSystem::activeWindowChanged (this=<optimized out>, _t1=65011808) at moc_kwindowsystem.cpp:302
#28 0x00007f92399d5026 in NETEventFilter::nativeEventFilter (this=0x603c9c0, ev=0x7f9220004000) at ../../src/kwindowsystem_x11.cpp:208
#29 0x00007f92356c6510 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f922811f02d in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#31 0x00007f92281204bb in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#32 0x00007f92356fb73a in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f9235fd3b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f9235fd9000 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f92356c9c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f92356cbc9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f9235722843 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f9231516c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f9231516f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f9231516fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f9235722c57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007f92356c73e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007f92356cf02c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x000000000042fd9b in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:158

*** Bug 348441 has been marked as a duplicate of this bug. ***

*** Bug 348535 has been marked as a duplicate of this bug. ***

*** Bug 348561 has been marked as a duplicate of this bug. ***

*** Bug 348689 has been marked as a duplicate of this bug. ***

*** Bug 348665 has been marked as a duplicate of this bug. ***

*** Bug 348664 has been marked as a duplicate of this bug. ***

*** Bug 348720 has been marked as a duplicate of this bug. ***

*** Bug 349016 has been marked as a duplicate of this bug. ***

*** Bug 349017 has been marked as a duplicate of this bug. ***

*** Bug 349103 has been marked as a duplicate of this bug. ***

I'm still have this issue but with IconTasks and usual Task Manager. Commit a9a35ac2778f737214493435d6f81223c401f8d4 doesn't help me. Steps to reproduce are the same as in Comment 16. Should I file another bug?

*** Bug 349154 has been marked as a duplicate of this bug. ***

(In reply to Ian Robertson from comment #50)
> I have turned off both window list and the icon task manager, and am still
> seeing frequent plasma crashes. They do seem to be related to the opening
> and/or closing of windows (even dialogue boxes).

I have noticed that this is no longer happening; looks like one of the updates fixed the problem. Thanks!

  - Ian

*** Bug 349201 has been marked as a duplicate of this bug. ***

*** Bug 349504 has been marked as a duplicate of this bug. ***

*** Bug 349576 has been marked as a duplicate of this bug. ***

*** Bug 349960 has been marked as a duplicate of this bug. ***

*** Bug 350020 has been marked as a duplicate of this bug. ***

*** Bug 350116 has been marked as a duplicate of this bug. ***

*** Bug 350537 has been marked as a duplicate of this bug. ***

*** Bug 350797 has been marked as a duplicate of this bug. ***

*** Bug 349062 has been marked as a duplicate of this bug. ***

*** Bug 351030 has been marked as a duplicate of this bug. ***

Could someone please say in which version this is supposed to be fixed?  This bug (or at least some which were marked as duplicates) still happens with:

plasma-workspace-5.3.2 and
plasma-desktop-5.3.2

where the two patched should be included already.

Qt 5.5

Basically we're seeing this; https://bugreports.qt.io/browse/QTBUG-43827

There was a patch that reduced the number of proxies used, which made it hit the bug in Qt less... but apparently still sometimes.

Hmm, that was probably another bug, because shouldn't it be fixed in QT 5.4.2 at latest? Because that's what I have here and experience a crash (For the record, initially reported in bug 351030)

*** Bug 351247 has been marked as a duplicate of this bug. ***

*** Bug 351554 has been marked as a duplicate of this bug. ***

*** Bug 351584 has been marked as a duplicate of this bug. ***

*** Bug 351649 has been marked as a duplicate of this bug. ***

*** Bug 351690 has been marked as a duplicate of this bug. ***

*** Bug 351743 has been marked as a duplicate of this bug. ***

*** Bug 351703 has been marked as a duplicate of this bug. ***

*** Bug 350452 has been marked as a duplicate of this bug. ***

*** Bug 352154 has been marked as a duplicate of this bug. ***

*** Bug 352144 has been marked as a duplicate of this bug. ***

*** Bug 352103 has been marked as a duplicate of this bug. ***

*** Bug 352240 has been marked as a duplicate of this bug. ***

*** Bug 352237 has been marked as a duplicate of this bug. ***

*** Bug 352383 has been marked as a duplicate of this bug. ***

*** Bug 351301 has been marked as a duplicate of this bug. ***

*** Bug 352543 has been marked as a duplicate of this bug. ***

*** Bug 352569 has been marked as a duplicate of this bug. ***

*** Bug 353132 has been marked as a duplicate of this bug. ***

*** Bug 353361 has been marked as a duplicate of this bug. ***

*** Bug 351772 has been marked as a duplicate of this bug. ***

*** Bug 353480 has been marked as a duplicate of this bug. ***

*** Bug 353594 has been marked as a duplicate of this bug. ***

    please remove me from your e-mail list. *Sent:* Tuesday, October 06,
   2015 at 12:07 PM
   *From:* "David Edmundson" <kde@davidedmundson.co.uk>
   *To:* calem726@caramail.com
   *Subject:* [plasmashell] [Bug 342763] Window List plasmoid crashes
   desktop shellhttps://bugs.kde.org/show_bug.cgi?id=342763

   --- Comment #98 from David Edmundson <kde@davidedmundson.co.uk> ---
   *** Bug 353594 has been marked as a duplicate of this bug. ***

   --
   You are receiving this mail because:
   You are on the CC list for the bug.

*** Bug 354168 has been marked as a duplicate of this bug. ***

I've collected 5 crash reports, also not knowing why exactly it crashes. Always seeing "KWindowSystem::activeWindowChanged" and then TaskManager, TaskManager... crash.
Now I saw closed bug "Window List plasmoid crashes desktop shell" and I've remembered that I did add that nice plasmoid so I can just press a hotkey and select the window...

Here is a backtrace with debug symbols for Qt 5.5.1. Plasma crashes for me every 5 minutes or so. And each time QQmlDelegateModel::_q_itemsChanged is near the top of the backtrace.

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6e5e15a940 (LWP 13279))]

Thread 15 (Thread 0x7f6e4906c700 (LWP 13281)):
#0  0x00007f6e588a952d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6e5c94c252 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f6e5c94dddf in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6e4a982839 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6e580b20a4 in start_thread (arg=0x7f6e4906c700) at pthread_create.c:309
#6  0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 14 (Thread 0x7f6e4263f700 (LWP 13284)):
#0  0x00007ffd415aac9b in clock_gettime ()
#1  0x00007f6e588becbd in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f6e59046086 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f6e591cb019 in QTimerInfoList::updateCurrentTime() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6e591cb585 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6e591cc96e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6e5566276d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f6e5566310b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f6e556632ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f6e591cd58b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f6e5917454a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6e58f90ac4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f6e5b811105 in QQmlThreadPrivate::run (this=0x2226240) at qml/ftw/qqmlthread.cpp:141
#13 0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f6e580b20a4 in start_thread (arg=0x7f6e4263f700) at pthread_create.c:309
#15 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7f6e39f70700 (LWP 13289)):
#0  0x00007f6e588a952d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6e556631dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6e556632ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6e591cd58b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6e5917454a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6e58f90ac4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6e5b811105 in QQmlThreadPrivate::run (this=0x2d9e500) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6e580b20a4 in start_thread (arg=0x7f6e39f70700) at pthread_create.c:309
#9  0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 12 (Thread 0x7f6e33fff700 (LWP 13292)):
#0  0x00007f6e55662157 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6e55663095 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6e556632ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6e591cd58b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6e5917454a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6e58f90ac4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6e5b811105 in QQmlThreadPrivate::run (this=0x2e5a660) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6e580b20a4 in start_thread (arg=0x7f6e33fff700) at pthread_create.c:309
#9  0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 11 (Thread 0x7f6e329c3700 (LWP 13293)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e5dbbc1c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f6e5dbbc209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f6e580b20a4 in start_thread (arg=0x7f6e329c3700) at pthread_create.c:309
#4  0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7f6daa8f2700 (LWP 13294)):
#0  0x00007f6e588a952d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6e556631dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6e556632ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6e591cd58b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6e5917454a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6e58f90ac4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6e5c193136 in QQuickPixmapReader::run (this=0x312e820) at util/qquickpixmapcache.cpp:760
#7  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6e580b20a4 in start_thread (arg=0x7f6daa8f2700) at pthread_create.c:309
#9  0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7f6d99af4700 (LWP 17334)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6e580b20a4 in start_thread (arg=0x7f6d99af4700) at pthread_create.c:309
#10 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7f6d992f3700 (LWP 17335)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6e580b20a4 in start_thread (arg=0x7f6d992f3700) at pthread_create.c:309
#10 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f6d98af2700 (LWP 17336)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6e580b20a4 in start_thread (arg=0x7f6d98af2700) at pthread_create.c:309
#10 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f6d8bfff700 (LWP 17337)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6e580b20a4 in start_thread (arg=0x7f6d8bfff700) at pthread_create.c:309
#12 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f6d8b7fe700 (LWP 17338)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6e580b20a4 in start_thread (arg=0x7f6d8b7fe700) at pthread_create.c:309
#10 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f6d8affd700 (LWP 17339)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6e580b20a4 in start_thread (arg=0x7f6d8affd700) at pthread_create.c:309
#10 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f6d8a7fc700 (LWP 17340)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6e580b20a4 in start_thread (arg=0x7f6d8a7fc700) at pthread_create.c:309
#10 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f6d89ffb700 (LWP 17341)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6e58f96d0b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6da87e3ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f6da87e80f8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f6da87e8152 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f6da87e307d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f6da87e6053 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f6e58f95a6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f6e580b20a4 in start_thread (arg=0x7f6d89ffb700) at pthread_create.c:309
#14 0x00007f6e588b206d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f6e5e15a940 (LWP 13279)):
[KCrash Handler]
#6  0x00007f6e5b5e3358 in VDMModelDelegateDataType::notify (this=<optimized out>, items=..., index=0, count=1, roles=...) at util/qqmladaptormodel.cpp:167
#7  0x00007f6e5b85297a in QQmlAdaptorModel::notify (roles=..., count=1, index=<optimized out>, items=..., this=0x514b298) at ../../include/QtQml/5.5.1/QtQml/private/../../../../../src/qml/util/qqmladaptormodel_p.h:118
#8  QQmlDelegateModel::_q_itemsChanged (this=<optimized out>, index=0, count=1, roles=...) at types/qqmldelegatemodel.cpp:1144
#9  0x00007f6e5b852ada in QQmlDelegateModel::_q_dataChanged (this=<optimized out>, begin=..., end=..., roles=...) at types/qqmldelegatemodel.cpp:1546
#10 0x00007f6e5b87a04c in QQmlDelegateModel::qt_static_metacall (_o=_o@entry=0x514ba40, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=12, _a=_a@entry=0x7ffd414dcb50) at .moc/moc_qqmldelegatemodel_p.cpp:203
#11 0x00007f6e5b87a838 in QQmlDelegateModel::qt_metacall (this=0x514ba40, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0x7ffd414dcb50) at .moc/moc_qqmldelegatemodel_p.cpp:344
#12 0x00007f6e591a5ae0 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f6e59221e7c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f6da8361c64 in ?? () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#15 0x00007f6da8362ed7 in ?? () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#16 0x00007f6e591a592a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f6da836ae38 in TaskManager::AbstractGroupableItem::changed(QFlags<TaskManager::TaskChange>) () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#18 0x00007f6da83582b0 in ?? () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#19 0x00007f6e591a592a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f6da836b028 in TaskManager::Task::changed(QFlags<TaskManager::TaskChange>) () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#21 0x00007f6da834a6fb in TaskManager::Task::setActive(bool) () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#22 0x00007f6da835e0bc in TaskManager::TaskManager::activeWindowChanged(unsigned long long) () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#23 0x00007f6da8360377 in ?? () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#24 0x00007f6e591a592a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f6e5b32bd12 in KWindowSystem::activeWindowChanged(unsigned long long) () from /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#26 0x00007f6e42a5f1e1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#27 0x00007f6e591736df in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f6e4a9862a4 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#29 0x00007f6e4a987053 in QXcbConnection::processXcbEvents() () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#30 0x00007f6e591a67f1 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f6e59c7b9dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007f6e59c80ea6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f6e59176dbb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f6e591791b6 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f6e591cd163 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f6e55662fe7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f6e55663240 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f6e556632ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f6e591cd56f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007f6e5917454a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007f6e5917c62c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00000000004322c3 in main ()

*** Bug 354773 has been marked as a duplicate of this bug. ***

*** Bug 355013 has been marked as a duplicate of this bug. ***

*** Bug 355117 has been marked as a duplicate of this bug. ***

*** Bug 354214 has been marked as a duplicate of this bug. ***

In my case, it frequently happens when i close any gui applications (no matter if those app are gtk-based or qt-based) on plasma-desktop 5.4.2 and qt 5.4.2.

In my case, it frequently happens when i close any gui applications (no matter if those app are gtk-based or qt-based) on plasma-desktop 5.4.2 and qt 5.4.2.

*** Bug 355321 has been marked as a duplicate of this bug. ***

We get this with Qt 5.5.1 (see e.g. bug 355621). Reopen?

*** Bug 355844 has been marked as a duplicate of this bug. ***

*** Bug 355890 has been marked as a duplicate of this bug. ***

according to  dpkg (see below) i am already on 5.5.1 and yet is till get those crashes.
whet seemed to help a bit is 
system settings -> display and monitor -> compositor
[x] enable at startup
animation speed: instant
scale method: accurate

rendering backend: opengl 3.1
opengl interface: EGL

tearing prevention: auto
keep window thumbnails: never
[ ] suspend compositor for full screen windows
[ ] enable color correction

this is the same configuration i use at home where i do not experience those crashes, never, despite the same usesage

interesting difference i see:
- crashing machine uses radeon driver for 
VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] (prog-if 00 [VGA controller])
        Subsystem: Dell Radeon HD 6350

- non-crashing machine (thinkpad t540p) has nvidia/intel combo where i use the intel driver

dpdkg output for Qt:

dpkg -s libqt5core5a 
Package: libqt5core5a
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 5302
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Architecture: amd64
Multi-Arch: same
Source: qtbase-opensource-src
Version: 5.5.1+dfsg-8
Replaces: libqt5core5 (<< 5.2.0+dfsg~)
Provides: qtbase-abi-5-5-1
Depends: libc6 (>= 2.15), libgcc1 (>= 1:4.1.1), libglib2.0-0 (>= 2.22.0), libicu55 (>= 55.1-1~), libpcre16-3, libstdc++6 (>= 4.9), zlib1g (>= 1:1.1.4)
Recommends: qttranslations5-l10n
Suggests: libthai0
Breaks: libqt5core5 (<< 5.2.0+dfsg~)
Description: Qt 5 core module
 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtCore module contains core non-GUI functionality.
Homepage: http://qt-project.org/

well, i don't think it is hardware related. In my case, i use nvidia GeForce GT750M. I noticed this problem come after I upgraded my system from Qt5.1  (which this problem didn't occur at that time). 
 The crash happens to recent Qt5 libs (Qt5 >= 5.3/5.4). In my opinion, new Qt libraries introduce this bug.

well, i don't think it is hardware related. In my case, i use nvidia GeForce GT750M. I noticed this problem come after I upgraded my system from Qt5.1  (which this problem didn't occur at that time). 
 The crash happens to recent Qt5 libs (Qt5 >= 5.3/5.4). In my opinion, new Qt libraries introduce this bug.

*** Bug 355907 has been marked as a duplicate of this bug. ***

*** Bug 355997 has been marked as a duplicate of this bug. ***

*** Bug 355993 has been marked as a duplicate of this bug. ***

*** Bug 356001 has been marked as a duplicate of this bug. ***

*** Bug 355524 has been marked as a duplicate of this bug. ***

*** Bug 356152 has been marked as a duplicate of this bug. ***

*** Bug 356376 has been marked as a duplicate of this bug. ***

*** Bug 355406 has been marked as a duplicate of this bug. ***

*** Bug 354132 has been marked as a duplicate of this bug. ***

*** Bug 356631 has been marked as a duplicate of this bug. ***

*** Bug 357250 has been marked as a duplicate of this bug. ***

*** Bug 357278 has been marked as a duplicate of this bug. ***

*** Bug 357309 has been marked as a duplicate of this bug. ***

*** Bug 357486 has been marked as a duplicate of this bug. ***

*** Bug 357494 has been marked as a duplicate of this bug. ***

*** Bug 357622 has been marked as a duplicate of this bug. ***

*** Bug 357563 has been marked as a duplicate of this bug. ***

*** Bug 357600 has been marked as a duplicate of this bug. ***

*** Bug 357841 has been marked as a duplicate of this bug. ***

*** Bug 357908 has been marked as a duplicate of this bug. ***

*** Bug 357998 has been marked as a duplicate of this bug. ***

*** Bug 358013 has been marked as a duplicate of this bug. ***

*** Bug 358300 has been marked as a duplicate of this bug. ***

*** Bug 358865 has been marked as a duplicate of this bug. ***

*** Bug 358822 has been marked as a duplicate of this bug. ***

*** Bug 358821 has been marked as a duplicate of this bug. ***

*** Bug 358820 has been marked as a duplicate of this bug. ***

*** Bug 358819 has been marked as a duplicate of this bug. ***

*** Bug 358803 has been marked as a duplicate of this bug. ***

*** Bug 358790 has been marked as a duplicate of this bug. ***

*** Bug 358749 has been marked as a duplicate of this bug. ***

*** Bug 358748 has been marked as a duplicate of this bug. ***

*** Bug 358720 has been marked as a duplicate of this bug. ***

*** Bug 358700 has been marked as a duplicate of this bug. ***

*** Bug 357978 has been marked as a duplicate of this bug. ***

*** Bug 350910 has been marked as a duplicate of this bug. ***

David, is there any other upstream bug report? The Qt bug referenced in comment #75 is marked as fixed since Qt 5.5.0, but we still get this.

*** Bug 358953 has been marked as a duplicate of this bug. ***

I'm also quite surprized to have new crashes linked as duplicated to this one, 
like https://bugs.kde.org/show_bug.cgi?id=358953
even if  Qt is far more recent than the supposed fixed version

Application: plasmashell (5.5.3)
Qt Version: 5.5.1
Operating System: Linux 4.4.0-2-default x86_64
Distribution: "openSUSE Tumbleweed (20160130) (x86_64)"

What can we do to debug it more ?
Also why drkonqui didn't find all those replicate

*** Bug 359017 has been marked as a duplicate of this bug. ***

*** Bug 358678 has been marked as a duplicate of this bug. ***

*** Bug 359043 has been marked as a duplicate of this bug. ***

*** Bug 359101 has been marked as a duplicate of this bug. ***

*** Bug 359137 has been marked as a duplicate of this bug. ***

*** Bug 359706 has been marked as a duplicate of this bug. ***

*** Bug 359776 has been marked as a duplicate of this bug. ***

*** Bug 359776 has been marked as a duplicate of this bug. ***

Can people show me their task manager settings (screenshot of the settings page) ? 
I want to make sure I run the same thing, in case that's related to triggering it.


Also can someone who had this crash a lot please upgrade to Qt 5.6 (the beta is out now AFAIK) and confirm that it's gone?

Created attachment 97605 [details]
Screenshot of my task manager settings

As requested I have attached a screen shot of my task manager settings.

We have an identical bug here: 346118
which is the same crash in the same place in Qt but occurs when the network manager UI updates.

I've attached there patch that adds some debug. If someone could patch Qt and reproduce the crash that would realy help.

Created attachment 97702 [details]
task manager's settings

I'm in OpenSUSE Leap 
Qt 5.5.1
Plasma 5.5.5

The crashes have gone away for me on Fedora 23 after a dnf update. Here are the obvious packages that would seem to be related:

    Upgraded   plasma-pk-updates-0.2-5.fc23.x86_64                        @@commandline
    Upgrade                      0.2-7.20160216git.fc23.x86_64            @updates
    Upgraded   qt5-qtbase-5.5.1-11.fc23.x86_64                            @@commandline
    Upgrade               5.5.1-12.fc23.x86_64                            @updates
    Upgraded   qt5-qtbase-common-5.5.1-11.fc23.noarch                     @@commandline
    Upgrade                      5.5.1-12.fc23.noarch                     @updates
    Upgraded   qt5-qtbase-gui-5.5.1-11.fc23.x86_64                        @@commandline
    Upgrade                   5.5.1-12.fc23.x86_64                        @updates

Here is the full list in case there might be other packages that could be related:

    Upgraded   abrt-2.8.0-2.fc23.x86_64                                   @updates
    Upgrade         2.8.0-3.fc23.x86_64                                   @updates
    Upgraded   abrt-addon-ccpp-2.8.0-2.fc23.x86_64                        @updates
    Upgrade                    2.8.0-3.fc23.x86_64                        @updates
    Upgraded   abrt-addon-coredump-helper-2.8.0-2.fc23.x86_64             @updates
    Upgrade                               2.8.0-3.fc23.x86_64             @updates
    Upgraded   abrt-addon-kerneloops-2.8.0-2.fc23.x86_64                  @updates
    Upgrade                          2.8.0-3.fc23.x86_64                  @updates
    Upgraded   abrt-addon-pstoreoops-2.8.0-2.fc23.x86_64                  @updates
    Upgrade                          2.8.0-3.fc23.x86_64                  @updates
    Upgraded   abrt-addon-python-2.8.0-2.fc23.x86_64                      @updates
    Upgrade                      2.8.0-3.fc23.x86_64                      @updates
    Upgraded   abrt-addon-python3-2.8.0-2.fc23.x86_64                     @updates
    Upgrade                       2.8.0-3.fc23.x86_64                     @updates
    Upgraded   abrt-addon-vmcore-2.8.0-2.fc23.x86_64                      @updates
    Upgrade                      2.8.0-3.fc23.x86_64                      @updates
    Upgraded   abrt-addon-xorg-2.8.0-2.fc23.x86_64                        @updates
    Upgrade                    2.8.0-3.fc23.x86_64                        @updates
    Upgraded   abrt-cli-2.8.0-2.fc23.x86_64                               @updates
    Upgrade             2.8.0-3.fc23.x86_64                               @updates
    Upgraded   abrt-dbus-2.8.0-2.fc23.x86_64                              @updates
    Upgrade              2.8.0-3.fc23.x86_64                              @updates
    Upgraded   abrt-desktop-2.8.0-2.fc23.x86_64                           @updates
    Upgrade                 2.8.0-3.fc23.x86_64                           @updates
    Upgraded   abrt-gui-2.8.0-2.fc23.x86_64                               @updates
    Upgrade             2.8.0-3.fc23.x86_64                               @updates
    Upgraded   abrt-gui-libs-2.8.0-2.fc23.x86_64                          @updates
    Upgrade                  2.8.0-3.fc23.x86_64                          @updates
    Upgraded   abrt-libs-2.8.0-2.fc23.x86_64                              @updates
    Upgrade              2.8.0-3.fc23.x86_64                              @updates
    Upgraded   abrt-plugin-bodhi-2.8.0-2.fc23.x86_64                      @updates
    Upgrade                      2.8.0-3.fc23.x86_64                      @updates
    Upgraded   abrt-python-2.8.0-2.fc23.x86_64                            @updates
    Upgrade                2.8.0-3.fc23.x86_64                            @updates
    Upgraded   abrt-python3-2.8.0-2.fc23.x86_64                           @updates
    Upgrade                 2.8.0-3.fc23.x86_64                           @updates
    Upgraded   abrt-retrace-client-2.8.0-2.fc23.x86_64                    @updates
    Upgrade                        2.8.0-3.fc23.x86_64                    @updates
    Upgraded   abrt-tui-2.8.0-2.fc23.x86_64                               @updates
    Upgrade             2.8.0-3.fc23.x86_64                               @updates
    Upgraded   appstream-data-23-7.fc23.noarch                            @@commandline
    Upgrade                   23-8.fc23.noarch                            @updates
    Upgraded   caja-1.12.2-3.fc23.x86_64                                  (unknown)
    Upgrade         1.12.4-1.fc23.x86_64                                  @updates
    Upgraded   caja-extensions-1.12.2-3.fc23.x86_64                       (unknown)
    Upgrade                    1.12.4-1.fc23.x86_64                       @updates
    Upgraded   caja-schemas-1.12.2-3.fc23.x86_64                          (unknown)
    Upgrade                 1.12.4-1.fc23.x86_64                          @updates
    Upgraded   curl-7.43.0-5.fc23.x86_64                                  @@commandline
    Upgrade         7.43.0-6.fc23.x86_64                                  @updates
    Upgraded   eom-1.12.1-1.fc23.x86_64                                   @@commandline
    Upgrade        1.12.2-1.fc23.x86_64                                   @updates
    Upgraded   firefox-41.0.1-2.fc23.x86_64                               (unknown)
    Upgrade            44.0.2-3.fc23.x86_64                               @updates
    Upgraded   gamin-0.1.10-18.fc23.i686                                  @@commandline
    Upgraded   gamin-0.1.10-18.fc23.x86_64                                @@commandline
    Upgrade          0.1.10-22.fc23.i686                                  @updates
    Upgrade          0.1.10-22.fc23.x86_64                                @updates
    Upgraded   gamin-python-0.1.10-18.fc23.x86_64                         @@commandline
    Upgrade                 0.1.10-22.fc23.x86_64                         @updates
    Upgraded   geocode-glib-3.18.0-1.fc23.x86_64                          @@commandline
    Upgrade                 3.18.1-1.fc23.x86_64                          @updates
    Upgraded   gnome-abrt-1.2.1-1.fc23.x86_64                             @@commandline
    Upgrade               1.2.2-1.fc23.x86_64                             @updates
    Upgrade    gnupg2-2.1.11-1.fc23.x86_64                                @updates
    Upgraded   gnupg2-2.1.9-1.fc23.x86_64                                 @@commandline
    Upgrade    gnupg2-smime-2.1.11-1.fc23.x86_64                          @updates
    Upgraded   gnupg2-smime-2.1.9-1.fc23.x86_64                           @@commandline
    Upgraded   gstreamer-plugins-bad-free-0.10.23-28.fc23.x86_64          @@commandline
    Upgrade                               0.10.23-29.fc23.x86_64          @updates
    Upgraded   gstreamer1-plugins-bad-free-1.6.3-2.fc23.x86_64            @updates
    Upgrade                                1.6.3-3.fc23.x86_64            @updates
    Upgraded   gvfs-1.26.2-1.fc23.x86_64                                  @@commandline
    Upgrade         1.26.3-1.fc23.x86_64                                  @updates
    Upgraded   gvfs-afc-1.26.2-1.fc23.x86_64                              @@commandline
    Upgrade             1.26.3-1.fc23.x86_64                              @updates
    Upgraded   gvfs-afp-1.26.2-1.fc23.x86_64                              @@commandline
    Upgrade             1.26.3-1.fc23.x86_64                              @updates
    Upgraded   gvfs-archive-1.26.2-1.fc23.x86_64                          @@commandline
    Upgrade                 1.26.3-1.fc23.x86_64                          @updates
    Upgraded   gvfs-client-1.26.2-1.fc23.x86_64                           @@commandline
    Upgrade                1.26.3-1.fc23.x86_64                           @updates
    Upgraded   gvfs-fuse-1.26.2-1.fc23.x86_64                             @@commandline
    Upgrade              1.26.3-1.fc23.x86_64                             @updates
    Upgraded   gvfs-goa-1.26.2-1.fc23.x86_64                              @@commandline
    Upgrade             1.26.3-1.fc23.x86_64                              @updates
    Upgraded   gvfs-gphoto2-1.26.2-1.fc23.x86_64                          @@commandline
    Upgrade                 1.26.3-1.fc23.x86_64                          @updates
    Upgraded   gvfs-mtp-1.26.2-1.fc23.x86_64                              @@commandline
    Upgrade             1.26.3-1.fc23.x86_64                              @updates
    Upgraded   gvfs-smb-1.26.2-1.fc23.x86_64                              @@commandline
    Upgrade             1.26.3-1.fc23.x86_64                              @updates
    Erase      kernel-4.3.4-200.fc22.x86_64                               @@commandline/22
    Install    kernel-4.4.2-301.fc23.x86_64                               @updates
    Erase      kernel-core-4.3.4-200.fc22.x86_64                          @@commandline/22
    Install    kernel-core-4.4.2-301.fc23.x86_64                          @updates
    Erase      kernel-debug-devel-4.3.4-200.fc22.x86_64                   @@commandline/22
    Install    kernel-debug-devel-4.4.2-301.fc23.x86_64                   @updates
    Erase      kernel-devel-4.3.4-200.fc22.x86_64                         @@commandline/22
    Install    kernel-devel-4.4.2-301.fc23.x86_64                         @updates
    Upgraded   kernel-headers-4.3.5-300.fc23.x86_64                       (unknown)
    Upgrade                   4.4.2-301.fc23.x86_64                       @updates
    Erase      kernel-modules-4.3.4-200.fc22.x86_64                       @@commandline/22
    Install    kernel-modules-4.4.2-301.fc23.x86_64                       @updates
    Erase      kernel-modules-extra-4.3.4-200.fc22.x86_64                 @@commandline/22
    Install    kernel-modules-extra-4.4.2-301.fc23.x86_64                 @updates
    Upgraded   kernel-tools-libs-4.3.5-300.fc23.x86_64                    (unknown)
    Upgrade                      4.4.2-301.fc23.x86_64                    @updates
    Erase      kmod-VirtualBox-4.3.4-200.fc22.x86_64-5.0.14-1.fc23.x86_64 @@commandline
    Upgraded   krb5-devel-1.14-8.fc23.x86_64                              @updates
    Upgrade               1.14-9.fc23.x86_64                              @updates
    Upgraded   krb5-libs-1.14-8.fc23.i686                                 @updates
    Upgraded   krb5-libs-1.14-8.fc23.x86_64                               @updates
    Upgrade              1.14-9.fc23.i686                                 @updates
    Upgrade              1.14-9.fc23.x86_64                               @updates
    Upgraded   krb5-workstation-1.14-8.fc23.x86_64                        @updates
    Upgrade                     1.14-9.fc23.x86_64                        @updates
    Upgraded   libcurl-7.43.0-5.fc23.x86_64                               @@commandline
    Upgrade            7.43.0-6.fc23.x86_64                               @updates
    Upgraded   libssh-0.7.2-2.fc23.x86_64                                 @@commandline
    Upgrade           0.7.3-1.fc23.x86_64                                 @updates
    Upgraded   libssh2-1.6.0-3.fc23.x86_64                                @@commandline
    Upgrade            1.6.0-4.fc23.x86_64                                @updates
    Upgraded   libusbx-1.0.20-1.fc23.x86_64                               @@commandline
    Upgrade            1.0.21-0.1.git448584a.fc23.x86_64                  @updates
    Upgrade    libv4l-1.10.0-1.fc23.x86_64                                @updates
    Upgraded   libv4l-1.8.1-1.fc23.x86_64                                 @@commandline
    Upgraded   mate-panel-1.12.1-1.fc23.x86_64                            @@commandline
    Upgrade               1.12.2-1.fc23.x86_64                            @updates
    Upgraded   mate-panel-libs-1.12.1-1.fc23.x86_64                       @@commandline
    Upgrade                    1.12.2-1.fc23.x86_64                       @updates
    Upgraded   memtest86+-5.01-11.fc23.x86_64                             @@commandline
    Upgrade               5.01-14.fc23.x86_64                             @updates
    Upgraded   openssh-7.1p2-3.fc23.x86_64                                @@commandline
    Upgrade            7.1p2-4.fc23.x86_64                                @updates
    Upgraded   openssh-askpass-7.1p2-3.fc23.x86_64                        @@commandline
    Upgrade                    7.1p2-4.fc23.x86_64                        @updates
    Upgraded   openssh-clients-7.1p2-3.fc23.x86_64                        @@commandline
    Upgrade                    7.1p2-4.fc23.x86_64                        @updates
    Upgraded   openssh-server-7.1p2-3.fc23.x86_64                         @@commandline
    Upgrade                   7.1p2-4.fc23.x86_64                         @updates
    Upgraded   plasma-pk-updates-0.2-5.fc23.x86_64                        @@commandline
    Upgrade                      0.2-7.20160216git.fc23.x86_64            @updates
    Upgraded   pluma-1.12.1-1.fc23.x86_64                                 @@commandline
    Upgrade          1.12.2-1.fc23.x86_64                                 @updates
    Upgraded   pluma-data-1.12.1-1.fc23.noarch                            @@commandline
    Upgrade               1.12.2-1.fc23.noarch                            @updates
    Upgraded   qt5-qtbase-5.5.1-11.fc23.x86_64                            @@commandline
    Upgrade               5.5.1-12.fc23.x86_64                            @updates
    Upgraded   qt5-qtbase-common-5.5.1-11.fc23.noarch                     @@commandline
    Upgrade                      5.5.1-12.fc23.noarch                     @updates
    Upgraded   qt5-qtbase-gui-5.5.1-11.fc23.x86_64                        @@commandline
    Upgrade                   5.5.1-12.fc23.x86_64                        @updates
    Upgraded   selinux-policy-3.13.1-158.6.fc23.noarch                    (unknown)
    Upgrade                   3.13.1-158.7.fc23.noarch                    @updates
    Upgraded   selinux-policy-devel-3.13.1-158.6.fc23.noarch              (unknown)
    Upgrade                         3.13.1-158.7.fc23.noarch              @updates
    Upgraded   selinux-policy-targeted-3.13.1-158.6.fc23.noarch           (unknown)
    Upgrade                            3.13.1-158.7.fc23.noarch           @updates
    Upgrade    setup-2.10.1-1.fc23.noarch                                 @updates
    Upgraded   setup-2.9.8-2.fc23.noarch                                  @@commandline
    Upgrade    sqlite-3.11.0-2.fc23.i686                                  @updates
    Upgrade    sqlite-3.11.0-2.fc23.x86_64                                @updates
    Obsoleted  sqlite-3.8.11.1-1.fc23.i686                                @fedora
    Obsoleted  sqlite-3.8.11.1-1.fc23.i686                                @fedora
    Upgraded   sqlite-3.8.11.1-1.fc23.x86_64                              @fedora
    Upgraded   sqlite-3.8.11.1-1.fc23.x86_64                              @fedora
    Obsoleted  sqlite-3.8.11.1-1.fc23.x86_64                              @fedora
    Obsoleted  sqlite-3.8.11.1-1.fc23.x86_64                              @fedora
    Obsoleting sqlite-libs-3.11.0-2.fc23.i686                             @updates
    Install    sqlite-libs-3.11.0-2.fc23.i686                             @updates
    Obsoleting sqlite-libs-3.11.0-2.fc23.x86_64                           @updates
    Install    sqlite-libs-3.11.0-2.fc23.x86_64                           @updates
    Upgraded   thunderbird-38.3.0-1.fc23.x86_64                           @fedora
    Upgrade                38.6.0-3.fc23.x86_64                           @updates
    Upgraded   wxBase3-3.0.2-12.fc23.x86_64                               @@commandline
    Upgrade            3.0.2-17.fc23.x86_64                               @updates
    Upgraded   wxGTK3-3.0.2-12.fc23.x86_64                                @@commandline
    Upgrade           3.0.2-17.fc23.x86_64                                @updates
    Upgraded   xen-libs-4.5.2-7.fc23.x86_64                               @@commandline
    Upgrade             4.5.2-8.fc23.x86_64                               @updates
    Upgraded   xen-licenses-4.5.2-7.fc23.x86_64                           @@commandline
    Upgrade                 4.5.2-8.fc23.x86_64                           @updates
    Upgraded   epiphany-runtime-1:3.18.3-1.fc23.x86_64                    @@commandline
    Upgrade                     1:3.18.4-1.fc23.x86_64                    @updates
    Upgraded   java-1.8.0-openjdk-headless-1:1.8.0.72-4.b15.fc23.x86_64   @updates
    Upgrade                                1:1.8.0.72-7.b15.fc23.x86_64   @updates
    Upgraded   perl-Module-CoreList-1:5.20160120-1.fc23.noarch            @@commandline
    Upgrade                         1:5.20160121-1.fc23.noarch            @updates

I got a similar crash when closing Lokalize:

=====
Application: Plasma (plasmashell), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f241517c7c0 (LWP 1905))]

Thread 7 (Thread 0x7f24139e6700 (LWP 1908)):
#0  0x00007f2421e12aed in poll () from /lib64/libc.so.6
#1  0x00007f2425f02a92 in _xcb_conn_wait () from /usr/lib64/libxcb.so.1
#2  0x00007f2425f0467f in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f2414eec159 in QXcbEventReader::run() () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f24224f3246 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f242161d314 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f2421e1b6dd in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f241094d700 (LWP 1920)):
#0  0x00007f2421e12aed in poll () from /lib64/libc.so.6
#1  0x00007f241ded8b74 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f241ded8c8c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f24226f464b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f242269fabb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f24224eddfc in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f2424d685f8 in QQmlThreadPrivate::run() () from /usr/lib64/libQt5Qml.so.5
#7  0x00007f24224f3246 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#8  0x00007f242161d314 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f2421e1b6dd in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f2402b19700 (LWP 1922)):
#0  0x00007f241df1a879 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f241ded8b26 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f241ded8c8c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f24226f464b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f242269fabb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f24224eddfc in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f2424d685f8 in QQmlThreadPrivate::run() () from /usr/lib64/libQt5Qml.so.5
#7  0x00007f24224f3246 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#8  0x00007f242161d314 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f2421e1b6dd in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f2401120700 (LWP 1923)):
#0  0x00007f241deae975 in g_ptr_array_set_size () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f241ded8110 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f241ded8a90 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f241ded8c8c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f24226f464b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f242269fabb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f24224eddfc in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#7  0x00007f2424d685f8 in QQmlThreadPrivate::run() () from /usr/lib64/libQt5Qml.so.5
#8  0x00007f24224f3246 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#9  0x00007f242161d314 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f2421e1b6dd in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f23f9057700 (LWP 1924)):
#0  0x00007f241df1a894 in g_mutex_unlock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f241ded81b0 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f241ded8a90 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f241ded8c8c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f24226f464b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f242269fabb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f24224eddfc in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#7  0x00007f2425725712 in QQuickPixmapReader::run() () from /usr/lib64/libQt5Quick.so.5
#8  0x00007f24224f3246 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#9  0x00007f242161d314 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f2421e1b6dd in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f2365f6a700 (LWP 1932)):
#0  0x00007f241df1a879 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f241ded81c9 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f241ded8a90 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f241ded8c8c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f24226f464b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f242269fabb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f24224eddfc in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#7  0x00007f2366e16767 in KCupsConnection::run() () from /usr/lib64/libkcupslib.so
#8  0x00007f24224f3246 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#9  0x00007f242161d314 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f2421e1b6dd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f241517c7c0 (LWP 1905)):
[KCrash Handler]
#6  0x00007f2421d680d7 in raise () from /lib64/libc.so.6
#7  0x00007f2421d6943a in abort () from /lib64/libc.so.6
#8  0x00007f24224e19fe in QMessageLogger::fatal(char const*, ...) const () from /usr/lib64/libQt5Core.so.5
#9  0x00007f24224dcd27 in qt_assert_x(char const*, char const*, char const*, int) () from /usr/lib64/libQt5Core.so.5
#10 0x00007f2424af67a6 in QVector<int>::at(int) const [clone .part.53] () from /usr/lib64/libQt5Qml.so.5
#11 0x00007f2424b0f966 in VDMModelDelegateDataType::notify(QQmlAdaptorModel const&, QList<QQmlDelegateModelItem*> const&, int, int, QVector<int> const&) const () from /usr/lib64/libQt5Qml.so.5
#12 0x00007f2424da9469 in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () from /usr/lib64/libQt5Qml.so.5
#13 0x00007f2424daeb60 in QQmlDelegateModel::_q_layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib64/libQt5Qml.so.5
#14 0x00007f2424dd329f in QQmlDelegateModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib64/libQt5Qml.so.5
#15 0x00007f2424dd393b in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libQt5Qml.so.5
#16 0x00007f24226cd76b in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#17 0x00007f2422742fe6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib64/libQt5Core.so.5
#18 0x00007f2422743c68 in QAbstractItemModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib64/libQt5Core.so.5
#19 0x00007f24226cd64e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#20 0x00007f2422742fe6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib64/libQt5Core.so.5
#21 0x00007f236f4e3f37 in KConcatenateRowsProxyModelPrivate::slotSourceLayoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib64/libKF5ItemModels.so.5
#22 0x00007f236f4e4193 in KConcatenateRowsProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib64/libKF5ItemModels.so.5
#23 0x00007f24226cd64e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#24 0x00007f2422742fe6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () from /usr/lib64/libQt5Core.so.5
#25 0x00007f2422679444 in QSortFilterProxyModelPrivate::_q_sourceDataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib64/libQt5Core.so.5
#26 0x00007f2422679a38 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib64/libQt5Core.so.5
#27 0x00007f24226cd64e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#28 0x00007f2422742f3c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib64/libQt5Core.so.5
#29 0x00007f2412942d25 in KFilePlacesModel::Private::_k_reloadBookmarks() () from /usr/lib64/libKF5KIOFileWidgets.so.5
#30 0x00007f2412944bd9 in KFilePlacesModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib64/libKF5KIOFileWidgets.so.5
#31 0x00007f24226cd64e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#32 0x00007f24126aceda in KBookmarkManager::changed(QString const&, QString const&) () from /usr/lib64/libKF5Bookmarks.so.5
#33 0x00007f24126b095e in KBookmarkManager::slotFileChanged(QString const&) () from /usr/lib64/libKF5Bookmarks.so.5
#34 0x00007f24226cd0d3 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#35 0x00007f2423e8a165 in KDirWatch::deleted(QString const&) () from /usr/lib64/libKF5CoreAddons.so.5
#36 0x00007f2423e8b0c8 in KDirWatch::setDeleted(QString const&) () from /usr/lib64/libKF5CoreAddons.so.5
#37 0x00007f24226ce91e in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#38 0x00007f242315c8dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#39 0x00007f2423161750 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#40 0x00007f24226a173d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#41 0x00007f24226a46ca in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQt5Core.so.5
#42 0x00007f24226f4e73 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/libQt5Core.so.5
#43 0x00007f241ded8994 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#44 0x00007f241ded8be8 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#45 0x00007f241ded8c8c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#46 0x00007f24226f462c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#47 0x00007f242269fabb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#48 0x00007f24226a74e6 in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#49 0x0000000000432816 in main ()

Also on FC23. Still seeing crashes after the various updates (updates-testing enabled)

PS why is this bug marked as resolved upstream?
I don't think it is!

Then get Qt 5.6 and give me a trace with it.

Sorry, had not seen the QT5.6 reference.

I will try it, but first I'm testing the latest 5.5 updates on Fedora.

After using Plasma (from git and now) 5.5.95 with Qt 5.6 since quite some time I'm pretty confident to say that the crash vanished for my usage.

Dear Heiko
Would you be able to provide a set of instructions on how to do all this?

(In reply to Mark van Rossum from comment #174)
> Would you be able to provide a set of instructions on how to do all this?

That's a question better suited for your distro.

FWIW, on Exherbo I just put
"plasma pre-prelease
qt5 pre-release"
in /etc/paludis/package_unmask.conf and did a "cave resolve world" afterwards to install the updates.

To answer my own question (how to update to QT5.6) for fedora and similar.

I did not want to go to  rawhide or a very early fc24.
For FC23 I did the following:
* download QT56
http://download.qt.io/snapshots/qt/5.6/5.6.0/360/

* Get the KDE building environment.
git clone git://anongit.kde.org/kdesrc-build.git ~/kdesrc
Update ~/.kdesrc-buildrc for plasma/kf5 (google)

* Build with
cd kdesrc; ./kdesrc-build
On first try, build will probably fail because you miss some devel packages. Check the errors.
I needed: lmdb-devel , vlc-devel,sqlite-devel, dbus-glib-devel  , NetworkManager-libnm-devel,systemd-devel nss-devel and some more....

*** Bug 360368 has been marked as a duplicate of this bug. ***

*** Bug 360580 has been marked as a duplicate of this bug. ***

*** Bug 360706 has been marked as a duplicate of this bug. ***

*** Bug 361104 has been marked as a duplicate of this bug. ***

*** Bug 361019 has been marked as a duplicate of this bug. ***

*** Bug 361081 has been marked as a duplicate of this bug. ***

*** Bug 361005 has been marked as a duplicate of this bug. ***

*** Bug 361184 has been marked as a duplicate of this bug. ***

*** Bug 360902 has been marked as a duplicate of this bug. ***

*** Bug 361803 has been marked as a duplicate of this bug. ***

*** Bug 361804 has been marked as a duplicate of this bug. ***

*** Bug 362000 has been marked as a duplicate of this bug. ***

I wonder whether this is solved with Qt 5.6.0.
I use the updated fc23 packages such as  qt5-qtbase-5.6.0-9.fc23.x86_64 but 
I still experience many random crashes, in see e.g. 
https://retrace.fedoraproject.org/faf/reports/1109178/

Not solved with Debian's version 5.6.0+dfsg-2 from experimental.

*** Bug 362457 has been marked as a duplicate of this bug. ***

*** Bug 362448 has been marked as a duplicate of this bug. ***

*** Bug 362275 has been marked as a duplicate of this bug. ***

*** Bug 362267 has been marked as a duplicate of this bug. ***

*** Bug 361826 has been marked as a duplicate of this bug. ***

*** Bug 362469 has been marked as a duplicate of this bug. ***

*** Bug 362270 has been marked as a duplicate of this bug. ***

*** Bug 362390 has been marked as a duplicate of this bug. ***

*** Bug 362798 has been marked as a duplicate of this bug. ***

*** Bug 363235 has been marked as a duplicate of this bug. ***

*** Bug 363244 has been marked as a duplicate of this bug. ***

*** Bug 363304 has been marked as a duplicate of this bug. ***

*** Bug 363493 has been marked as a duplicate of this bug. ***

*** Bug 363583 has been marked as a duplicate of this bug. ***

*** Bug 363706 has been marked as a duplicate of this bug. ***

*** Bug 363835 has been marked as a duplicate of this bug. ***

*** Bug 363964 has been marked as a duplicate of this bug. ***

*** Bug 346521 has been marked as a duplicate of this bug. ***

Reopening and keeping this open, until someone either confirms it is a Qt bug and provides a QTBUG link, or confirms it is a bug in the way Plasma uses the QML models.

We are still seeing it with Qt 5.6.0, see e.g. bug 363706.

The code this is crashing in no longer exists in 5.7.

Thanks Eike for your massive work on the task manager rewrite, which not only solves this issue, but also a lot others! https://blogs.kde.org/2016/05/31/new-plasma-task-manager-backend-faster-better-wayland

For those who cannot wait for Plasma 5.7, they might try the Qt patch attached to the gerrit link from https://bugreports.qt.io/browse/QTBUG-53677

See also sister bug 346118.

Eike, please resolve as FIXED or UPSTREAM at your convenience.

Unsubscribe CC'ed person per abuse reports.

*** Bug 364698 has been marked as a duplicate of this bug. ***

*** Bug 364694 has been marked as a duplicate of this bug. ***

*** Bug 365063 has been marked as a duplicate of this bug. ***

qt5-qtdeclarative-5.7.0 reproduced QTBUG-52340 https://bugreports.qt.io/browse/QTBUG-52340

@Leslie Zhai  does this happen with Plasma 5.7?

Hi Macro, yes, it does happen with Plasma 5.7, I argue that it might be Qt's UPSTREAM issue, but I will try plasma-framework-5.24 or git master ;-)

*** Bug 365680 has been marked as a duplicate of this bug. ***

*** Bug 365747 has been marked as a duplicate of this bug. ***

can you paste a full backtrace with 5.7?

(In reply to Marco Martin from comment #221)
> can you paste a full backtrace with 5.7?

bt https://forum.isoft-linux.org/viewtopic.php?f=4&p=128
patch https://codereview.qt-project.org/#/c/157520/ but perhaps there are still other issues have not been fixed for callProperty...

*** Bug 366582 has been marked as a duplicate of this bug. ***

*** Bug 367701 has been marked as a duplicate of this bug. ***

*** Bug 367669 has been marked as a duplicate of this bug. ***

*** Bug 367622 has been marked as a duplicate of this bug. ***

I am experiencing crashes when typing to search for applications in the KDE Application Launcher (KDE Plasma 5.7.3 under Arch Linux): https://bugs.kde.org/show_bug.cgi?id=366190 . Comment 10 in my bug report suggests that it may be related to this bug.

After years of loyalty I switched from openSuse Leap to ArchLinux. There I have plasma-desktop 5.7.3-1.
The system is running for a week now without a single error (the application launcher runs fine, too).

*** Bug 368200 has been marked as a duplicate of this bug. ***

*** Bug 368328 has been marked as a duplicate of this bug. ***

*** Bug 368326 has been marked as a duplicate of this bug. ***

*** Bug 368277 has been marked as a duplicate of this bug. ***

Perhaps https://bugs.kde.org/show_bug.cgi?id=366022 and https://bugs.kde.org/show_bug.cgi?id=366190 are related to this bug.

I found something out: There seem to be a relationship to the "Windowlist" widget (in german it is "Fensterliste" so i guess it is "Windowlist" or "Tasklist" in english).
When I place this widget on my desktop or in one of my taskbars I have the crash problem. If I remove it, also the crash problem is not present anymore.

Can anyone reproduce this?

*** Bug 368677 has been marked as a duplicate of this bug. ***

*** Bug 367701 has been marked as a duplicate of this bug. ***

Using "Icons-Only Task Manager" under Plasma 5.7 and seeing this, along with a lot of other oddities, when I close windows that are grouped.

Most of the time, the icons just move around wildly for no reason.  For instance, if I have three Kate windows open, and I close one, suddenly Kate has moved to the end, and when I try to drag it back to where it was, two other icons jump out of place.  It's all quite messy (and not happening in 5.6).

Backtrace of the crash I experienced when closing one of five KWrites I had open:

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f75261f9800 (LWP 18769))]

Thread 15 (Thread 0x7f746bb81700 (LWP 18783)):
#0  0x00007f7520d2b7fd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f751cba40c7 in g_main_context_poll (priority=0, context=<optimized out>, timeout=<optimized out>, fds=<optimized out>, n_fds=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:4135
#2  g_main_context_iterate (context=<optimized out>, block=<optimized out>, dispatch=<optimized out>, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3835
#3  0x00007f751cba419e in g_main_context_iteration (context=<optimized out>, may_block=1) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3901
#4  0x00007f75215d611c in QEventDispatcherGlib::processEvents (this=0x7f74640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f7521585001 in QEventLoop::processEvents (flags=..., this=<optimized out>) at kernel/qeventloop.cpp:128
#6  QEventLoop::exec (this=0x7f746bb80d90, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f75213da5e9 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#8  0x00007f7524494978 in QQuickPixmapReader::run (this=0x15dae50) at util/qquickpixmapcache.cpp:817
#9  0x00007f75213ddd24 in QThreadPrivate::start (arg=0x15dae50) at thread/qthread_unix.cpp:341
#10 0x00007f7520834434 in start_thread (arg=0x7f746bb81700) at pthread_create.c:333
#11 0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f7470bc2700 (LWP 18782)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d5538, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d5538) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d5490) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f7470bc2700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f74713c3700 (LWP 18781)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d53d0, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d53d0) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d5328) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f74713c3700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f7471bc4700 (LWP 18780)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d5268, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d5268) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d51c0) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f7471bc4700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f74723c5700 (LWP 18779)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d5100, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d5100) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d5058) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f74723c5700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f7472bc6700 (LWP 18778)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d4f98, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d4f98) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d4ef0) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f7472bc6700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f74733c7700 (LWP 18777)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d4e30, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d4e30) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d4d88) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f74733c7700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f7473bc8700 (LWP 18776)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d4cc8, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d4cc8) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d4c20) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f7473bc8700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f74743c9700 (LWP 18775)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7479e78de3 in cnd_wait (mtx=0x13d4b60, cond=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x13d4b60) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x13d4ab8) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f7479e789b7 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.1.0/work/mesa-11.1.0/include/c11/threads_posix.h:87
#5  0x00007f7520834434 in start_thread (arg=0x7f74743c9700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f74fb1c5700 (LWP 18774)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7525c4deaa in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f7525d30820 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f7525c4de26 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f7525d3e8f4 <QTWTF::pageheap_memory+57556>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f7520834434 in start_thread (arg=0x7f74fb1c5700) at pthread_create.c:333
#4  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f7508f79700 (LWP 18773)):
#0  0x00007f7520d277dd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f751cbe6e9f in g_wakeup_acknowledge (wakeup=0x7f74fc002390) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gwakeup.c:210
#2  0x00007f751cba3a06 in g_main_context_check (context=0x7f7500000990, max_priority=2147483647, fds=0x7f75000030c0, n_fds=1) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3632
#3  0x00007f751cba410a in g_main_context_iterate (context=<optimized out>, block=<optimized out>, dispatch=<optimized out>, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3837
#4  0x00007f751cba419e in g_main_context_iteration (context=<optimized out>, may_block=1) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3901
#5  0x00007f75215d611c in QEventDispatcherGlib::processEvents (this=0x7f75000008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#6  0x00007f7521585001 in QEventLoop::processEvents (flags=..., this=<optimized out>) at kernel/qeventloop.cpp:128
#7  QEventLoop::exec (this=0x7f7508f78dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f75213da5e9 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#9  0x00007f7523b56bf6 in QQmlThreadPrivate::run (this=0x11201a0) at qml/ftw/qqmlthread.cpp:141
#10 0x00007f75213ddd24 in QThreadPrivate::start (arg=0x11201a0) at thread/qthread_unix.cpp:341
#11 0x00007f7520834434 in start_thread (arg=0x7f7508f79700) at pthread_create.c:333
#12 0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f750a5bf700 (LWP 18772)):
#0  0x00007f751cbe7ada in g_mutex_get_impl (mutex=0x7f74fc000990) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gthread-posix.c:124
#1  g_mutex_unlock (mutex=0x7f74fc000990) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gthread-posix.c:232
#2  0x00007f751cba398a in g_main_context_query (context=0x7f74fc000990, max_priority=<optimized out>, timeout=<optimized out>, fds=<optimized out>, n_fds=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3589
#3  0x00007f751cba401f in g_main_context_iterate (context=<optimized out>, block=<optimized out>, dispatch=<optimized out>, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3822
#4  0x00007f751cba419e in g_main_context_iteration (context=<optimized out>, may_block=1) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3901
#5  0x00007f75215d611c in QEventDispatcherGlib::processEvents (this=0x7f74fc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#6  0x00007f7521585001 in QEventLoop::processEvents (flags=..., this=<optimized out>) at kernel/qeventloop.cpp:128
#7  QEventLoop::exec (this=0x7f750a5bedd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f75213da5e9 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#9  0x00007f7523b56bf6 in QQmlThreadPrivate::run (this=0x1027cd0) at qml/ftw/qqmlthread.cpp:141
#10 0x00007f75213ddd24 in QThreadPrivate::start (arg=0x1027cd0) at thread/qthread_unix.cpp:341
#11 0x00007f7520834434 in start_thread (arg=0x7f750a5bf700) at pthread_create.c:333
#12 0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f750bdf5700 (LWP 18771)):
#0  0x00007f7520d2b7fd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f751cba40c7 in g_main_context_poll (priority=0, context=<optimized out>, timeout=<optimized out>, fds=<optimized out>, n_fds=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:4135
#2  g_main_context_iterate (context=<optimized out>, block=<optimized out>, dispatch=<optimized out>, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3835
#3  0x00007f751cba419e in g_main_context_iteration (context=<optimized out>, may_block=1) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3901
#4  0x00007f75215d611c in QEventDispatcherGlib::processEvents (this=0x7f75040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f7521585001 in QEventLoop::processEvents (flags=..., this=<optimized out>) at kernel/qeventloop.cpp:128
#6  QEventLoop::exec (this=0x7f750bdf4dc0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f75213da5e9 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#8  0x00007f7526306430 in QDBusConnectionManager::run (this=0x7f7526368260 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:189
#9  0x00007f75213ddd24 in QThreadPrivate::start (arg=0x7f7526368260 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#10 0x00007f7520834434 in start_thread (arg=0x7f750bdf5700) at pthread_create.c:333
#11 0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f7511fd2700 (LWP 18770)):
#0  0x00007f7520d2b7fd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f7524c16382 in _xcb_conn_wait (c=0xf4f270, cond=<optimized out>, vector=0x0, count=0x0) at /var/tmp/portage/x11-libs/libxcb-1.12/work/libxcb-1.12/src/xcb_conn.c:479
#2  0x00007f7524c17ba9 in xcb_wait_for_event (c=0xf4f270) at /var/tmp/portage/x11-libs/libxcb-1.12/work/libxcb-1.12/src/xcb_in.c:693
#3  0x00007f75136e3935 in QXcbEventReader::run (this=0xf5d7c0) at qxcbconnection.cpp:1325
#4  0x00007f75213ddd24 in QThreadPrivate::start (arg=0xf5d7c0) at thread/qthread_unix.cpp:341
#5  0x00007f7520834434 in start_thread (arg=0x7f7511fd2700) at pthread_create.c:333
#6  0x00007f7520d348fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f75261f9800 (LWP 18769)):
[KCrash Handler]
#6  QSortFilterProxyModelPrivate::updateChildrenMapping (this=<optimized out>, source_parent=..., parent_mapping=<optimized out>, orient=<optimized out>, start=<optimized out>, end=<optimized out>, delta_item_count=<optimized out>, remove=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:969
#7  0x00007f7521558edd in QSortFilterProxyModelPrivate::source_items_removed (this=<optimized out>, source_parent=..., start=1, end=<optimized out>, orient=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:911
#8  0x00007f75215b6e50 in QMetaObject::activate (sender=0x13bc910, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3730
#9  0x00007f7521628292 in QAbstractItemModel::rowsRemoved (this=0x0, _t1=..., _t2=<optimized out>, _t3=<optimized out>) at .moc/moc_qabstractitemmodel.cpp:615
#10 0x00007f752153d2ef in QAbstractItemModel::endRemoveRows (this=0x13bc910) at itemmodels/qabstractitemmodel.cpp:2678
#11 0x00007f7460dfe324 in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved (this=0x13aef70, parent=..., first=<optimized out>, last=<optimized out>) at /var/tmp/portage/kde-plasma/plasma-workspace-5.7.1/work/plasma-workspace-5.7.1/libtaskmanager/taskgroupingproxymodel.cpp:197
#12 0x00007f75215b6e50 in QMetaObject::activate (sender=0x2121130, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3730
#13 0x00007f7521628242 in QAbstractItemModel::rowsAboutToBeRemoved (this=0x0, _t1=..., _t2=<optimized out>, _t3=<optimized out>) at .moc/moc_qabstractitemmodel.cpp:608
#14 0x00007f752153d279 in QAbstractItemModel::beginRemoveRows (this=0x2121130, parent=..., first=9, last=9) at itemmodels/qabstractitemmodel.cpp:2661
#15 0x00007f7521556f6d in QSortFilterProxyModelPrivate::remove_proxy_interval (this=<optimized out>, source_to_proxy=..., proxy_to_source=..., proxy_start=<optimized out>, proxy_end=<optimized out>, proxy_parent=..., orient=<optimized out>, emit_signal=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:577
#16 0x00007f7521556eab in QSortFilterProxyModelPrivate::remove_source_items (this=0x20f3ba0, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=Qt::Vertical, emit_signal=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:558
#17 0x00007f7521558bf9 in QSortFilterProxyModelPrivate::source_items_about_to_be_removed (this=0x20f3ba0, source_parent=..., start=<optimized out>, end=<optimized out>, orient=(unknown: 0)) at itemmodels/qsortfilterproxymodel.cpp:859
#18 0x00007f75215b6e50 in QMetaObject::activate (sender=0x212e7a0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3730
#19 0x00007f7521628242 in QAbstractItemModel::rowsAboutToBeRemoved (this=0x0, _t1=..., _t2=<optimized out>, _t3=<optimized out>) at .moc/moc_qabstractitemmodel.cpp:608
#20 0x00007f752153d279 in QAbstractItemModel::beginRemoveRows (this=0x212e7a0, parent=..., first=9, last=9) at itemmodels/qabstractitemmodel.cpp:2661
#21 0x00007f7462935668 in KConcatenateRowsProxyModelPrivate::slotRowsAboutToBeRemoved (this=0x212e740, start=9, end=9) at /var/tmp/portage/kde-frameworks/kitemmodels-5.24.0/work/kitemmodels-5.24.0/src/kconcatenaterowsproxymodel.cpp:241
#22 KConcatenateRowsProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/kde-frameworks/kitemmodels-5.24.0/work/kitemmodels-5.24.0_build/src/moc_kconcatenaterowsproxymodel.cpp:130
#23 0x00007f75215b6e50 in QMetaObject::activate (sender=0x13af680, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3730
#24 0x00007f7521628242 in QAbstractItemModel::rowsAboutToBeRemoved (this=0x0, _t1=..., _t2=<optimized out>, _t3=<optimized out>) at .moc/moc_qabstractitemmodel.cpp:608
#25 0x00007f752153d279 in QAbstractItemModel::beginRemoveRows (this=0x13af680, parent=..., first=9, last=9) at itemmodels/qabstractitemmodel.cpp:2661
#26 0x00007f7460e1aba4 in TaskManager::XWindowTasksModel::Private::removeWindow (this=0x13bbe20, window=77595111) at /var/tmp/portage/kde-plasma/plasma-workspace-5.7.1/work/plasma-workspace-5.7.1/libtaskmanager/xwindowtasksmodel.cpp:253
#27 0x00007f75215b6dc8 in QtPrivate::QSlotObjectBase::call (this=0x13c91a0, r=<optimized out>, a=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#28 QMetaObject::activate (sender=0x7f75238bac08 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3715
#29 0x00007f75236ae000 in KWindowSystem::windowRemoved (this=0x0, _t1=<optimized out>) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0_build/src/KF5WindowSystem_automoc.dir/moc_kwindowsystem.cpp:311
#30 0x00007f750a7d23d2 in NETEventFilter::removeClient (this=<optimized out>, w=<optimized out>) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0/src/platforms/xcb/kwindowsystem.cpp:384
#31 0x00007f75236a0e95 in NETRootInfo::update (this=0x1508610, properties=..., properties2=...) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0/src/platforms/xcb/netwm.cpp:2045
#32 0x00007f75236a3ed8 in NETRootInfo::event (this=0x1508610, event=<optimized out>, properties=0x7ffdee1541d8, properties2=0x7ffdee1541d0) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0/src/platforms/xcb/netwm.cpp:1886
#33 0x00007f75236a3f49 in NETRootInfo::event (this=0x0, ev=0x1, properties=0x7ffdee154270, properties_size=5) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0/src/platforms/xcb/netwm.cpp:1671
#34 0x00007f750a7d1a2f in NETEventFilter::nativeEventFilter (this=0x1508610, ev=0xba71d70) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0/src/platforms/xcb/kwindowsystem.cpp:239
#35 0x00007f750a7d1ec3 in non-virtual thunk to NETEventFilter::nativeEventFilter(QByteArray const&, void*, long*) () at /var/tmp/portage/kde-frameworks/kwindowsystem-5.24.0/work/kwindowsystem-5.24.0/src/platforms/xcb/kwindowsystem.cpp:183
#36 0x00007f75215841c3 in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=0xba71d70, result=0x7ffdee1543b0) at kernel/qabstracteventdispatcher.cpp:460
#37 0x00007f75136e21bd in QXcbConnection::handleXcbEvent (this=0xf4da80, event=0xba71d70) at qxcbconnection.cpp:1091
#38 0x00007f75136e4570 in QXcbConnection::processXcbEvents (this=0xf4da80) at qxcbconnection.cpp:1723
#39 0x00007f75215b036f in QObject::event (this=0xf4da80, e=<optimized out>) at kernel/qobject.cpp:1256
#40 0x00007f75136e4f88 in QXcbConnection::event (this=0x0, e=0x7f750c003be0) at qxcbconnection.cpp:2339
#41 0x00007f7521e1f792 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0xf4da80, e=0x7f750c003be0) at kernel/qapplication.cpp:3804
#42 0x00007f7521e215c2 in QApplication::notify (this=<optimized out>, receiver=0xf4da80, e=0x7f750c003be0) at kernel/qapplication.cpp:3163
#43 0x00007f752158873b in QCoreApplication::notifyInternal2 (receiver=0xf4da80, event=0x7f750c003be0) at kernel/qcoreapplication.cpp:1015
#44 0x00007f75215892f8 in QCoreApplication::sendEvent (receiver=0xf4da80, event=0x7f750c003be0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#45 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xf3b240) at kernel/qcoreapplication.cpp:1650
#46 0x00007f75215d65a3 in postEventSourceDispatch (s=0xf8f4f0) at kernel/qeventdispatcher_glib.cpp:270
#47 0x00007f751cba3ded in g_main_dispatch (context=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3154
#48 g_main_context_dispatch (context=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3769
#49 0x00007f751cba4119 in g_main_context_iterate (context=<optimized out>, block=<optimized out>, dispatch=<optimized out>, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3840
#50 0x00007f751cba419e in g_main_context_iteration (context=<optimized out>, may_block=1) at /var/tmp/portage/dev-libs/glib-2.48.1-r1/work/glib-2.48.1/glib/gmain.c:3901
#51 0x00007f75215d611c in QEventDispatcherGlib::processEvents (this=0xf8d400, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#52 0x00007f7521585001 in QEventLoop::processEvents (flags=..., this=<optimized out>) at kernel/qeventloop.cpp:128
#53 QEventLoop::exec (this=0x7ffdee154bb0, flags=...) at kernel/qeventloop.cpp:204
#54 0x00007f7521588d63 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#55 0x000000000041e94b in main (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-plasma/plasma-workspace-5.7.1/work/plasma-workspace-5.7.1/shell/main.cpp:166

Here, I had never seen this bug before upgrading to KF 5.26.0. in 3 days, it happened twice.

Thread 1 (Thread 0x7f98f97fd640 (LWP 13335)):
[KCrash Handler]
#5  0x00007f98f6731140 in ?? () from /usr/lib/libQt5Qml.so.5
#6  0x00007f98f698041a in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () from /usr/lib/libQt5Qml.so.5
#7  0x00007f98f69a7a9c in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f98f69a81d8 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQt5Qml.so.5
#9  0x00007f98f3804684 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#10 0x00007f98f387bcbc in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib/libQt5Core.so.5
#11 0x00007f982764c2e3 in ?? () from /usr/lib/liblegacytaskmanager.so.5
#12 0x00007f98f38044e9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#13 0x00007f9827657a78 in LegacyTaskManager::AbstractGroupableItem::changed(QFlags<LegacyTaskManager::TaskChange>) () from /usr/lib/liblegacytaskmanager.so.5
#14 0x00007f982763f4a0 in ?? () from /usr/lib/liblegacytaskmanager.so.5
#15 0x00007f98f38044e9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#16 0x00007f9827657c68 in LegacyTaskManager::Task::changed(QFlags<LegacyTaskManager::TaskChange>) () from /usr/lib/liblegacytaskmanager.so.5
#17 0x00007f9827629ea5 in LegacyTaskManager::Task::setActive(bool) () from /usr/lib/liblegacytaskmanager.so.5
#18 0x00007f9827645769 in LegacyTaskManager::LegacyTaskManager::activeWindowChanged(unsigned long long) () from /usr/lib/liblegacytaskmanager.so.5
#19 0x00007f98f380485e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#20 0x00007f98f647eab2 in KWindowSystem::activeWindowChanged(unsigned long long) () from /usr/lib/libKF5WindowSystem.so.5
#21 0x00007f98d994fecb in ?? () from /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#22 0x00007f98f37d621f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /usr/lib/libQt5Core.so.5
#23 0x00007f98e36a3c34 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /usr/lib/libQt5XcbQpa.so.5
#24 0x00007f98e36a48c5 in QXcbConnection::processXcbEvents() () from /usr/lib/libQt5XcbQpa.so.5
#25 0x00007f98f3805349 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5
#26 0x00007f98f4743e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#27 0x00007f98f474b5b1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#28 0x00007f98f37d8c80 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#29 0x00007f98f37db3fd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5
#30 0x00007f98f382d173 in ?? () from /usr/lib/libQt5Core.so.5
#31 0x00007f98ee0ffe67 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#32 0x00007f98ee1000d0 in ?? () from /usr/lib/libglib-2.0.so.0
#33 0x00007f98ee10017c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#34 0x00007f98f382d57f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#35 0x00007f98f37d70da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#36 0x00007f98f37df5cc in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#37 0x000000000041b54d in ?? ()
#38 0x00007f98f2e4c291 in __libc_start_main () from /usr/lib/libc.so.6
#39 0x000000000041b8ca in _start ()

*** Bug 369279 has been marked as a duplicate of this bug. ***

(In reply to Thomas Weinhold from comment #234)
> I found something out: There seem to be a relationship to the "Windowlist"
> widget (in german it is "Fensterliste" so i guess it is "Windowlist" or
> "Tasklist" in english).
> When I place this widget on my desktop or in one of my taskbars I have the
> crash problem. If I remove it, also the crash problem is not present anymore.
> 
> Can anyone reproduce this?

Yes sir!    I removed my "lista de janelas" (portuguese) (window list) and my desktop became stable!  I just reinstalled it, after about two weeks without, just to see if the problems reappear... I think they will :(

Exactly the same for me. No window list, no crashes at all. With window list, random crashes when closing some windows/tasks.

Same for me, can't pin point the problem until now, its "window list" widget that causing the problem

*** Bug 369884 has been marked as a duplicate of this bug. ***

*** Bug 369885 has been marked as a duplicate of this bug. ***

*** Bug 371521 has been marked as a duplicate of this bug. ***

*** Bug 371698 has been marked as a duplicate of this bug. ***

*** Bug 372124 has been marked as a duplicate of this bug. ***

*** Bug 372128 has been marked as a duplicate of this bug. ***

*** Bug 372531 has been marked as a duplicate of this bug. ***

Got the same crash as awilfox here with 5.7.5

*** Bug 372760 has been marked as a duplicate of this bug. ***

*** Bug 372827 has been marked as a duplicate of this bug. ***

Thread 1 (Thread 0x7f828a8b57c0 (LWP 4593)):
[KCrash Handler]
#5  QSortFilterProxyModelPrivate::updateChildrenMapping (this=this@entry=0x4693100, source_parent=..., parent_mapping=parent_mapping@entry=0x6306690, orient=orient@entry=Qt::Vertical, start=start@entry=0, end=end@entry=0, delta_item_count=1, remove=true) at itemmodels/qsortfilterproxymodel.cpp:969
#6  0x00007f8285a90d11 in QSortFilterProxyModelPrivate::source_items_removed (this=<optimized out>, source_parent=..., start=0, end=<optimized out>, orient=orient@entry=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:911
#7  0x00007f8285a90fb7 in QSortFilterProxyModelPrivate::source_items_removed (orient=Qt::Vertical, end=<optimized out>, start=<optimized out>, source_parent=..., this=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:871
#8  QSortFilterProxyModelPrivate::_q_sourceRowsRemoved (this=<optimized out>, source_parent=..., start=<optimized out>, end=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1418
#9  0x00007f8285a96859 in QSortFilterProxyModel::qt_static_metacall (_o=_o@entry=0x4693320, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=14, _a=_a@entry=0x7ffe21fe0140) at .moc/moc_qsortfilterproxymodel.cpp:211
#10 0x00007f8285ae74e0 in QMetaObject::activate (sender=sender@entry=0x46ae8f0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffe21fe0140) at kernel/qobject.cpp:3730
#11 0x00007f8285ae7d77 in QMetaObject::activate (sender=sender@entry=0x46ae8f0, m=m@entry=0x7f8285cf4e40 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffe21fe0140) at kernel/qobject.cpp:3595
#12 0x00007f8285b578e4 in QAbstractItemModel::rowsRemoved (this=this@entry=0x46ae8f0, _t1=..., _t2=0, _t3=0) at .moc/moc_qabstractitemmodel.cpp:615
#13 0x00007f8285a75754 in QAbstractItemModel::endRemoveRows (this=0x46ae8f0) at itemmodels/qabstractitemmodel.cpp:2678
#14 0x00007f81d641a57d in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved (this=0x46b42f0, first=<optimized out>, last=14, parent=...) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4/libtaskmanager/taskgroupingproxymodel.cpp:197
#15 0x00007f81d641d629 in TaskManager::TaskGroupingProxyModel::qt_static_metacall (_o=_o@entry=0x46ae8f0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=7, _a=_a@entry=0x7ffe21fe0440) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4_build/libtaskmanager/moc_taskgroupingproxymodel.cpp:152
#16 0x00007f8285ae74e0 in QMetaObject::activate (sender=sender@entry=0x46b14d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffe21fe0440) at kernel/qobject.cpp:3730
#17 0x00007f8285ae7d77 in QMetaObject::activate (sender=sender@entry=0x46b14d0, m=m@entry=0x7f8285cf4e40 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffe21fe0440) at kernel/qobject.cpp:3595
#18 0x00007f8285b57874 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x46b14d0, _t1=..., _t2=_t2@entry=0, _t3=_t3@entry=14) at .moc/moc_qabstractitemmodel.cpp:608
#19 0x00007f8285a74c63 in QAbstractItemModel::beginRemoveRows (this=0x46b14d0, parent=..., first=0, last=14) at itemmodels/qabstractitemmodel.cpp:2661
#20 0x00007f8285a8f445 in QSortFilterProxyModelPrivate::remove_proxy_interval (this=this@entry=0x469eda0, source_to_proxy=..., proxy_to_source=..., proxy_start=0, proxy_end=14, proxy_parent=..., orient=Qt::Vertical, emit_signal=true) at itemmodels/qsortfilterproxymodel.cpp:577
#21 0x00007f8285a94227 in QSortFilterProxyModelPrivate::remove_source_items (this=this@entry=0x469eda0, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=orient@entry=Qt::Vertical, emit_signal=true) at itemmodels/qsortfilterproxymodel.cpp:559
#22 0x00007f8285a946b8 in QSortFilterProxyModelPrivate::handle_filter_changed (this=this@entry=0x469eda0, source_to_proxy=..., proxy_to_source=..., source_parent=..., orient=orient@entry=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:1143
#23 0x00007f8285a9499c in QSortFilterProxyModelPrivate::filter_changed (this=0x469eda0, source_parent=...) at itemmodels/qsortfilterproxymodel.cpp:1075
#24 0x00007f8285a952e1 in QSortFilterProxyModel::invalidateFilter (this=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:2606
#25 0x00007f81d64166d5 in TaskManager::TaskFilterProxyModel::setVirtualDesktop (this=0x46b14d0, virtualDesktop=<optimized out>) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4/libtaskmanager/taskfilterproxymodel.cpp:80
#26 0x00007f81d642109d in TaskManager::TasksModel::setVirtualDesktop (this=<optimized out>, virtualDesktop=<optimized out>) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4/libtaskmanager/tasksmodel.cpp:877
#27 0x00007f81d643edc2 in TaskManager::TasksModel::qt_static_metacall (_o=_o@entry=0x4693320, _c=_c@entry=QMetaObject::WriteProperty, _id=_id@entry=4, _a=_a@entry=0x7ffe21fe0a90) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4_build/libtaskmanager/taskmanager_automoc.dir/moc_tasksmodel_5PI2WC4JZPOU4Z.cpp:591
#28 0x00007f81d643fbbb in TaskManager::TasksModel::qt_metacall (this=0x4693320, _c=QMetaObject::WriteProperty, _id=4, _a=0x7ffe21fe0a90) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4_build/libtaskmanager/taskmanager_automoc.dir/moc_tasksmodel_5PI2WC4JZPOU4Z.cpp:651
#29 0x00007f828809ff52 in QQmlVMEMetaObject::metaCall (this=0x46bffc0, o=<optimized out>, c=QMetaObject::WriteProperty, _id=14, a=0x7ffe21fe0a90) at qml/qqmlvmemetaobject.cpp:876
#30 0x00007f828812000b in QQmlBinding::write (this=this@entry=0x46a8360, core=..., result=..., isUndefined=<optimized out>, flags=...) at qml/qqmlbinding.cpp:242
#31 0x00007f828812138a in QQmlBinding::update (this=0x46a8360, flags=...) at qml/qqmlbinding.cpp:191
#32 0x00007f82881217de in QQmlBinding::refresh (this=<optimized out>) at qml/qqmlbinding.cpp:403
#33 0x00007f82880f8bbe in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:94
#34 0x00007f82880a467c in QQmlData::signalEmitted (object=0x46a8670, index=3, a=0x0) at qml/qqmlengine.cpp:772
#35 0x00007f8285ae7000 in QMetaObject::activate (sender=0x46a8670, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3616
#36 0x00007f8285ae780e in QtPrivate::QSlotObjectBase::call (a=0x7ffe21fe2770, r=0x46a8670, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#37 QMetaObject::activate (sender=sender@entry=0x7f8287e6c180 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe21fe2770) at kernel/qobject.cpp:3715
#38 0x00007f8285ae7d77 in QMetaObject::activate (sender=sender@entry=0x7f8287e6c180 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, m=m@entry=0x7f8287e6ab80 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe21fe2770) at kernel/qobject.cpp:3595
#39 0x00007f8287c5d14e in KWindowSystem::currentDesktopChanged (this=this@entry=0x7f8287e6c180 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, _t1=2) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.28.0/work/kwindowsystem-5.28.0_build/src/KF5WindowSystem_automoc.dir/moc_kwindowsystem_WAINN7OXDV4STE.cpp:297
#40 0x00007f82740b23bf in NETEventFilter::nativeEventFilter (this=0x2d553d0, ev=0x7f82700037d0) at /var/tmp/portage/kde-frameworks/kwindowsystem-5.28.0/work/kwindowsystem-5.28.0/src/platforms/xcb/kwindowsystem.cpp:240
#41 0x00007f8285abdbac in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7f82700037d0, result=result@entry=0x7ffe21fe28a8) at kernel/qabstracteventdispatcher.cpp:460
#42 0x00007f8277a52d85 in QXcbConnection::handleXcbEvent (this=this@entry=0x26a3e70, event=event@entry=0x7f82700037d0) at qxcbconnection.cpp:1094
#43 0x00007f8277a53d46 in QXcbConnection::processXcbEvents (this=0x26a3e70) at qxcbconnection.cpp:1729
#44 0x00007f8285ae8571 in QObject::event (this=0x26a3e70, e=<optimized out>) at kernel/qobject.cpp:1256
#45 0x00007f8286340cec in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x26a3e70, e=0x7f8270003710) at kernel/qapplication.cpp:3804
#46 0x00007f82863461d6 in QApplication::notify (this=0x7ffe21fe3030, receiver=0x26a3e70, e=0x7f8270003710) at kernel/qapplication.cpp:3561
#47 0x00007f8285abfc5a in QCoreApplication::notifyInternal2 (receiver=0x26a3e70, event=event@entry=0x7f8270003710) at kernel/qcoreapplication.cpp:1015
#48 0x00007f8285ac1caa in QCoreApplication::sendEvent (event=0x7f8270003710, receiver=<optimized out>) at kernel/qcoreapplication.h:225
#49 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x268f590) at kernel/qcoreapplication.cpp:1650
#50 0x00007f8285ac2168 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#51 0x00007f8285b0ed23 in postEventSourceDispatch (s=0x26cefd0) at kernel/qeventdispatcher_glib.cpp:270
#52 0x00007f82823d1457 in g_main_dispatch (context=0x7f82700016f0) at /var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gmain.c:3203
#53 g_main_context_dispatch (context=context@entry=0x7f82700016f0) at /var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gmain.c:3856
#54 0x00007f82823d16b0 in g_main_context_iterate (context=context@entry=0x7f82700016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gmain.c:3929
#55 0x00007f82823d175c in g_main_context_iteration (context=0x7f82700016f0, may_block=may_block@entry=1) at /var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gmain.c:3990
#56 0x00007f8285b0ed9f in QEventDispatcherGlib::processEvents (this=0x26dde70, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#57 0x00007f8285abeaca in QEventLoop::exec (this=this@entry=0x7ffe21fe2ec0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#58 0x00007f8285ac657c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#59 0x00007f8285de6aac in QGuiApplication::exec () at kernel/qguiapplication.cpp:1607
#60 0x00007f828633dca5 in QApplication::exec () at kernel/qapplication.cpp:2979
#61 0x000000000041caba in main (argc=2, argv=<optimized out>) at /var/tmp/portage/kde-plasma/plasma-workspace-5.8.4/work/plasma-workspace-5.8.4/shell/main.cpp:166

*** Bug 373045 has been marked as a duplicate of this bug. ***

*** Bug 373214 has been marked as a duplicate of this bug. ***

*** Bug 373317 has been marked as a duplicate of this bug. ***

*** Bug 373455 has been marked as a duplicate of this bug. ***

*** Bug 373409 has been marked as a duplicate of this bug. ***

*** Bug 373568 has been marked as a duplicate of this bug. ***

*** Bug 373600 has been marked as a duplicate of this bug. ***

*** Bug 373733 has been marked as a duplicate of this bug. ***

*** Bug 373718 has been marked as a duplicate of this bug. ***

*** Bug 373762 has been marked as a duplicate of this bug. ***

*** Bug 373795 has been marked as a duplicate of this bug. ***

*** Bug 373815 has been marked as a duplicate of this bug. ***

*** Bug 373955 has been marked as a duplicate of this bug. ***

There is 185 duplicates of this bug. It brings an important question to my mind: How we should celebrate 200th duplicate? Cake? Party? Any ideas?

The best tribute would be a solution.

(In reply to Thomas Weinhold from comment #268)
> The best tribute would be a solution.

be reasonable, please!

We are fixing bugs in layoutChanged() of various proxymodels right now in Qt.
Maybe this will fix this. Maybe not. I don't know how the QtQuick code enters the picture. But someone who compiles Qt 5.8 from git and who can easily reproduce this crash, could try to apply these commits to Qt and see if they help.

https://codereview.qt-project.org/180249
https://codereview.qt-project.org/180389
https://codereview.qt-project.org/180390

In fact they are being staged right now for the first time, so with a bit of luck they'll be in qtbase.git in week or so :-)

*** Bug 373875 has been marked as a duplicate of this bug. ***

(In reply to David Faure from comment #270)
> We are fixing bugs in layoutChanged() of various proxymodels right now in Qt.
> Maybe this will fix this. Maybe not. [..]

Okay, I am now not able to build Qt and KDE on my machine (never tried this).
But David, thank you a lot for the status update!

*** Bug 374039 has been marked as a duplicate of this bug. ***

*** Bug 374200 has been marked as a duplicate of this bug. ***

*** Bug 374349 has been marked as a duplicate of this bug. ***

*** Bug 374521 has been marked as a duplicate of this bug. ***

*** Bug 374586 has been marked as a duplicate of this bug. ***

*** Bug 374620 has been marked as a duplicate of this bug. ***

*** Bug 374987 has been marked as a duplicate of this bug. ***

*** Bug 362947 has been marked as a duplicate of this bug. ***

*** Bug 374953 has been marked as a duplicate of this bug. ***

Note that comments #237 and #253 refer to a different crash that is not in QQmlDelegateModel.

Consider those duplicates of 375393.

*** Bug 375430 has been marked as a duplicate of this bug. ***

*** Bug 375393 has been marked as a duplicate of this bug. ***

Congratulations! That was the 200th duplicate!

*** Bug 370361 has been marked as a duplicate of this bug. ***

*** Bug 375492 has been marked as a duplicate of this bug. ***

*** Bug 375947 has been marked as a duplicate of this bug. ***

*** Bug 376575 has been marked as a duplicate of this bug. ***

*** Bug 375393 has been marked as a duplicate of this bug. ***

*** Bug 377507 has been marked as a duplicate of this bug. ***

*** Bug 377486 has been marked as a duplicate of this bug. ***

*** Bug 377519 has been marked as a duplicate of this bug. ***

*** Bug 377575 has been marked as a duplicate of this bug. ***

*** Bug 377651 has been marked as a duplicate of this bug. ***

*** Bug 377713 has been marked as a duplicate of this bug. ***

*** Bug 377706 has been marked as a duplicate of this bug. ***

*** Bug 378131 has been marked as a duplicate of this bug. ***

*** Bug 378052 has been marked as a duplicate of this bug. ***

*** Bug 378380 has been marked as a duplicate of this bug. ***

*** Bug 378421 has been marked as a duplicate of this bug. ***

*** Bug 378611 has been marked as a duplicate of this bug. ***

*** Bug 378635 has been marked as a duplicate of this bug. ***

*** Bug 378516 has been marked as a duplicate of this bug. ***

*** Bug 378847 has been marked as a duplicate of this bug. ***

*** Bug 379181 has been marked as a duplicate of this bug. ***

*** Bug 379439 has been marked as a duplicate of this bug. ***

*** Bug 379853 has been marked as a duplicate of this bug. ***

*** Bug 379826 has been marked as a duplicate of this bug. ***

*** Bug 379906 has been marked as a duplicate of this bug. ***

*** Bug 379936 has been marked as a duplicate of this bug. ***

*** Bug 380063 has been marked as a duplicate of this bug. ***

(In reply to David Faure from comment #270)
> We are fixing bugs in layoutChanged() of various proxymodels right now in Qt.
> Maybe this will fix this. Maybe not. I don't know how the QtQuick code
> enters the picture. But someone who compiles Qt 5.8 from git and who can
> easily reproduce this crash, could try to apply these commits to Qt and see
> if they help.
> 
> https://codereview.qt-project.org/180249
> https://codereview.qt-project.org/180389
> https://codereview.qt-project.org/180390
> 
> In fact they are being staged right now for the first time, so with a bit of
> luck they'll be in qtbase.git in week or so :-)

I can reproduce this quite reliably with the above patches backported to Qt 5.7.1.

*** Bug 380443 has been marked as a duplicate of this bug. ***

*** Bug 380162 has been marked as a duplicate of this bug. ***

*** Bug 380242 has been marked as a duplicate of this bug. ***

*** Bug 380253 has been marked as a duplicate of this bug. ***

*** Bug 380265 has been marked as a duplicate of this bug. ***

*** Bug 380285 has been marked as a duplicate of this bug. ***

*** Bug 380426 has been marked as a duplicate of this bug. ***

*** Bug 380469 has been marked as a duplicate of this bug. ***

*** Bug 380918 has been marked as a duplicate of this bug. ***

*** Bug 380995 has been marked as a duplicate of this bug. ***

*** Bug 381111 has been marked as a duplicate of this bug. ***

*** Bug 381029 has been marked as a duplicate of this bug. ***

*** Bug 381132 has been marked as a duplicate of this bug. ***

*** Bug 381430 has been marked as a duplicate of this bug. ***

This ticket keeps getting abused as dupe target for any sort of TM crash, even if they are not the original itemChanged crash, and it's making us miss TM crashes.

If you have a backtrace involving TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved, please use bug 381317.

If you have a backtrace involving QSortFilterProxyModelPrivate::updateChildrenMapping, please use bug 381006.

*** Bug 382302 has been marked as a duplicate of this bug. ***

*** Bug 381974 has been marked as a duplicate of this bug. ***

*** Bug 375189 has been marked as a duplicate of this bug. ***

Created attachment 107467 [details]
New crash information added by DrKonqi

plasmashell (5.10.4) using Qt 5.7.1

- What I was doing when the application crashed:

Closing a group of Okular, that was the first time that his behaviour presented itself

-- Backtrace (Reduced):
#6  0x00007fd420ef8cbb in QSortFilterProxyModelPrivate::updateChildrenMapping(QModelIndex const&, QSortFilterProxyModelPrivate::Mapping*, Qt::Orientation, int, int, int, bool) () from /lib64/libQt5Core.so.5
#8  0x00007fd420efea09 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Core.so.5
[...]
#10 0x00007fd420fc0e44 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#11 0x00007fd420edc63b in QAbstractItemModel::endRemoveRows() () from /lib64/libQt5Core.so.5
#12 0x00007fd36838d9c6 in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) () from /lib64/libtaskmanager.so.6