Application: plasmashell (5.4.2)

Qt Version: 5.5.1
Operating System: Linux 4.2.1-1-desktop x86_64
Distribution: "openSUSE Tumbleweed (20151030) (x86_64)"

-- Information about the crash:
The plasma crashes seemingly randomly several times in a workday.
The crashes seem to be related to opening application windows.
Sometimes that happens right away after login.
I have this problem for several weeks now.

Custom settings:
I use three plasma panels on different screen edges in a dual-monitor setup, all with autohide with one containing a window list plasma widget.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc44ab2f8c0 (LWP 14233))]

Thread 9 (Thread 0x7fc434129700 (LWP 14235)):
#0  0x00007fc44411e1cd in poll () at /lib64/libc.so.6
#1  0x00007fc448fbe432 in  () at /usr/lib64/libxcb.so.1
#2  0x00007fc448fc0007 in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007fc436278e29 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fc44480f94f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7fc431507700 (LWP 14252)):
#0  0x00007fc44411e1cd in poll () at /lib64/libc.so.6
#1  0x00007fc440826264 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fc44082636c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fc444a3452b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fc4449de63a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fc44480ab1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fc447a9f9a5 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fc44480f94f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7fc4279f6700 (LWP 14254)):
#0  0x00007fc44392b07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fc42e48b50a in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007fc42e48ad37 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fc421ac1700 (LWP 14255)):
#0  0x00007fc44411e1cd in poll () at /lib64/libc.so.6
#1  0x00007fc440826264 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fc44082636c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fc444a3452b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fc4449de63a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fc44480ab1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fc447a9f9a5 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fc44480f94f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fc41f7c4700 (LWP 14258)):
#0  0x00007fc4408694b9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fc440825899 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fc440826193 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fc44082636c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fc444a3452b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fc4449de63a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fc44480ab1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fc447a9f9a5 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fc44480f94f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fc41de78700 (LWP 14259)):
#0  0x00007fc44392b07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fc44a22ba84 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007fc44a22bac9 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fc39b24b700 (LWP 14263)):
#0  0x00007fc444a3393b in  () at /usr/lib64/libQt5Core.so.5
#1  0x00007fc44082588d in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fc440826193 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fc44082636c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fc444a3452b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fc4449de63a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fc44480ab1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fc44861be42 in  () at /usr/lib64/libQt5Quick.so.5
#8  0x00007fc44480f94f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fc391b53700 (LWP 14264)):
#0  0x00007fc44411e1cd in poll () at /lib64/libc.so.6
#1  0x00007fc440826264 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fc44082636c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fc444a3452b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fc4449de63a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fc44480ab1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fc394063ed7 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#7  0x00007fc44480f94f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fc4439254a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fc444126b5d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fc44ab2f8c0 (LWP 14233)):
[KCrash Handler]
#6  0x00007fc44787bdf8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fc447ade8ea in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fc447b045bc in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fc447b04ca8 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007fc444a0e140 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#11 0x00007fc444a8621c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () at /usr/lib64/libQt5Core.so.5
#12 0x00007fc39709a0a4 in  () at /usr/lib64/libtaskmanager.so.5
#13 0x00007fc39709b227 in  () at /usr/lib64/libtaskmanager.so.5
#14 0x00007fc444a0df8a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#15 0x00007fc3970a2b78 in TaskManager::AbstractGroupableItem::changed(QFlags<TaskManager::TaskChange>) () at /usr/lib64/libtaskmanager.so.5
#16 0x00007fc397090df0 in  () at /usr/lib64/libtaskmanager.so.5
#17 0x00007fc444a0df8a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#18 0x00007fc3970a2ca8 in TaskManager::Task::changed(QFlags<TaskManager::TaskChange>) () at /usr/lib64/libtaskmanager.so.5
#19 0x00007fc397083c5b in TaskManager::Task::setActive(bool) () at /usr/lib64/libtaskmanager.so.5
#20 0x00007fc39709688c in TaskManager::TaskManager::activeWindowChanged(unsigned long long) () at /usr/lib64/libtaskmanager.so.5
#21 0x00007fc3970989d7 in  () at /usr/lib64/libtaskmanager.so.5
#22 0x00007fc444a0df8a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#23 0x00007fc4475c2a62 in KWindowSystem::activeWindowChanged(unsigned long long) () at /usr/lib64/libKF5WindowSystem.so.5
#24 0x00007fc43171b80b in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#25 0x00007fc4449dd87f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#26 0x00007fc43627c804 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#27 0x00007fc43627d58b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#28 0x00007fc444a0ed79 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#29 0x00007fc445d568cc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#30 0x00007fc445d5b9d6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#31 0x00007fc4449e0cf3 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#32 0x00007fc4449e3016 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#33 0x00007fc444a34103 in  () at /usr/lib64/libQt5Core.so.5
#34 0x00007fc440826097 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#35 0x00007fc4408262c8 in  () at /usr/lib64/libglib-2.0.so.0
#36 0x00007fc44082636c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#37 0x00007fc444a3450f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#38 0x00007fc4449de63a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#39 0x00007fc4449e62fd in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#40 0x0000000000434150 in main(int, char**) (argc=4, argv=<optimized out>) at /usr/src/debug/plasma-workspace-5.4.2/shell/main.cpp:176

Reported using DrKonqi