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)"

-- Information about the crash:
On a double screen (one hidpi 3840x2160@287dpi, on normal 1600x1200@96dpi) 
a firefox (screen 0) + debug console (screen 1)
click on change dekstop on systray lead to this crash

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 0x7f7fc2e12900 (LWP 8342))]

Thread 16 (Thread 0x7f7fa39d9700 (LWP 8349)):
#0  0x00007f7fbc38c22d in read () at /lib64/libc.so.6
#1  0x00007f7fb3b2ef75 in  () at /usr/lib64/tls/libnvidia-tls.so.352.79
#2  0x00007f7fb8ac6210 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f7fb8a83d94 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f7fb8a84208 in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f7fb8a8436c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#6  0x00007f7fbcca652b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f7fbcc5063a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#8  0x00007f7fbca7cb1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#9  0x00007f7fbfd4c9a5 in  () at /usr/lib64/libQt5Qml.so.5
#10 0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#11 0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#12 0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f7f976c8700 (LWP 8362)):
#0  0x00007f7fbc38c22d in read () at /lib64/libc.so.6
#1  0x00007f7fb3b2ef75 in  () at /usr/lib64/tls/libnvidia-tls.so.352.79
#2  0x00007f7fb8ac6210 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f7fb8a83d94 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f7fb8a84208 in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f7fb8a8436c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#6  0x00007f7fbcca652b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f7fbcc5063a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#8  0x00007f7fbca7cb1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#9  0x00007f7fbfd4c9a5 in  () at /usr/lib64/libQt5Qml.so.5
#10 0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#11 0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#12 0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f7f95d21700 (LWP 8363)):
#0  0x00007f7fb8a81462 in  () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f7fb8a83c2a in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f7fb8a84208 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f7fb8a8436c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f7fbcca652b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbcc5063a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f7fbca7cb1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f7fbfd4c9a5 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f7f8ffff700 (LWP 8366)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fc24f4a84 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f7fc24f4ac9 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f7f8cc9b700 (LWP 8413)):
#0  0x00007f7fbbb9b110 in __pthread_mutex_unlock_usercnt () at /lib64/libpthread.so.0
#1  0x00007f7fb7ea9ce5 in  () at /usr/X11R6/lib64/libGL.so.1
#2  0x00007f7fb7eaefbb in  () at /usr/X11R6/lib64/libGL.so.1
#3  0x00007f7fb3b2eff0 in  () at /usr/lib64/tls/libnvidia-tls.so.352.79
#4  0x00007f7fb8ac6210 in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f7fb8a83d94 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#6  0x00007f7fb8a84208 in  () at /usr/lib64/libglib-2.0.so.0
#7  0x00007f7fb8a8436c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#8  0x00007f7fbcca652b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#9  0x00007f7fbcc5063a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#10 0x00007f7fbca7cb1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#11 0x00007f7fc08d1e42 in  () at /usr/lib64/libQt5Quick.so.5
#12 0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#13 0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#14 0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f7f0369e700 (LWP 8414)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f7f01419700 (LWP 8415)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f7ef17fc700 (LWP 8774)):
#0  0x00007f7fbbb9fcfc in __lll_lock_wait () at /lib64/libpthread.so.0
#1  0x00007f7fbbb99bb2 in pthread_mutex_lock () at /lib64/libpthread.so.0
#2  0x00007f7fb7ea9fcc in  () at /usr/X11R6/lib64/libGL.so.1
#3  0x00007f7fb7eaeb11 in  () at /usr/X11R6/lib64/libGL.so.1
#4  0x00007f7fb7eaefbb in  () at /usr/X11R6/lib64/libGL.so.1
#5  0x00007f7fb3b2eff0 in  () at /usr/lib64/tls/libnvidia-tls.so.352.79
#6  0x00007f7fb8ac6210 in  () at /usr/lib64/libglib-2.0.so.0
#7  0x00007f7fb8a83d94 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#8  0x00007f7fb8a84208 in  () at /usr/lib64/libglib-2.0.so.0
#9  0x00007f7fb8a8436c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#10 0x00007f7fbcca652b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f7fbcc5063a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#12 0x00007f7fbca7cb1c in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#13 0x00007f7eded06e47 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#14 0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#15 0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#16 0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f7edc5e3700 (LWP 8775)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f7eccfbd700 (LWP 8897)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f7ecd7be700 (LWP 9019)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f7ec7fff700 (LWP 9040)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f7ec77fe700 (LWP 9042)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f7ec5bfd700 (LWP 10557)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f7ec53fc700 (LWP 10558)):
#0  0x00007f7fbbb9d07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f7fbca82abb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f7fc094400e in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f7fc0944853 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f7fbca8194f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f7fbbb974a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f7fbc398bdd in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f7fc2e12900 (LWP 8342)):
[KCrash Handler]
#6  0x00007f7fbfb28df8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f7fbfd8b8ea in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f7fbfdb15bc in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007f7fbfdb1ca8 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007f7fbcc80140 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f7fbccf821c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () at /usr/lib64/libQt5Core.so.5
#12 0x00007f7eeb2d4834 in  () at /usr/lib64/libtaskmanager.so.5
#13 0x00007f7eeb2d59b7 in  () at /usr/lib64/libtaskmanager.so.5
#14 0x00007f7fbcc7ff8a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#15 0x00007f7eeb2dd338 in TaskManager::AbstractGroupableItem::changed(QFlags<TaskManager::TaskChange>) () at /usr/lib64/libtaskmanager.so.5
#16 0x00007f7eeb2cab90 in  () at /usr/lib64/libtaskmanager.so.5
#17 0x00007f7fbcc7ff8a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#18 0x00007f7eeb2dd468 in TaskManager::Task::changed(QFlags<TaskManager::TaskChange>) () at /usr/lib64/libtaskmanager.so.5
#19 0x00007f7eeb2bd22b in TaskManager::Task::setActive(bool) () at /usr/lib64/libtaskmanager.so.5
#20 0x00007f7eeb2d0759 in TaskManager::TaskManager::activeWindowChanged(unsigned long long) () at /usr/lib64/libtaskmanager.so.5
#21 0x00007f7fbcc7fe17 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#22 0x00007f7fbf8700e2 in KWindowSystem::activeWindowChanged(unsigned long long) () at /usr/lib64/libKF5WindowSystem.so.5
#23 0x00007f7fa3bed80b in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#24 0x00007f7fbcc4f87f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#25 0x00007f7fad232804 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#26 0x00007f7fad23358b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#27 0x00007f7fbcc80d79 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#28 0x00007f7fbdfc98cc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#29 0x00007f7fbdfce9d6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#30 0x00007f7fbcc52cf3 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#31 0x00007f7fbcc55016 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#32 0x00007f7fbcca6103 in  () at /usr/lib64/libQt5Core.so.5
#33 0x00007f7fb8a84097 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#34 0x00007f7fb8a842c8 in  () at /usr/lib64/libglib-2.0.so.0
#35 0x00007f7fb8a8436c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#36 0x00007f7fbcca650f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#37 0x00007f7fbcc5063a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#38 0x00007f7fbcc582fd in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#39 0x0000000000436527 in main(int, char**) (argc=2, argv=<optimized out>) at /usr/src/debug/plasma-workspace-5.5.3/shell/main.cpp:179

Reported using DrKonqi