Application: plasmashell (5.10.3)

Qt Version: 5.9.0
Frameworks Version: 5.35.0
Operating System: Linux 4.11.8-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:

i pressed the close icon on the Lazarus IDE window

- Unusual behavior I noticed:

After quitting Lazarus IDE KDE crashed, screent went black and the KDE desktop and task bar were restarted without having to log back in.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ffa5b5328c0 (LWP 1907))]

Thread 9 (Thread 0x7ff984b82700 (LWP 2022)):
#0  0x00007ffa4f860e17 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#1  0x00007ffa553cb75b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#2  0x00007ffa55374d0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007ffa551a705a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#4  0x00007ff98746bf37 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#5  0x00007ffa551ab73e in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7ff998f9a700 (LWP 2012)):
#0  0x00007ffa4f8a5b54 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007ffa4f860cc6 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ffa4f860e1c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007ffa553cb75b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007ffa55374d0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007ffa551a705a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007ffa58ee6292 in  () at /usr/lib64/libQt5Quick.so.5
#7  0x00007ffa551ab73e in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7ff9a27a9700 (LWP 2011)):
#0  0x00007ffa543705ed in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007ff9aaee12fb in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007ff9aaee1037 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7ff9a2faa700 (LWP 2010)):
#0  0x00007ffa543705ed in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007ff9aaee12fb in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007ff9aaee1037 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7ffa3592a700 (LWP 2009)):
#0  0x00007ffa543705ed in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007ffa5abeca04 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007ffa5abeca49 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7ffa37bb2700 (LWP 2008)):
#0  0x00007ffa54aaf08d in poll () at /lib64/libc.so.6
#1  0x00007ffa4f860d09 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ffa4f860e1c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007ffa553cb75b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007ffa55374d0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007ffa551a705a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007ffa5832ed45 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007ffa551ab73e in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7ffa3d9ca700 (LWP 1994)):
#0  0x00007ffa551a3c27 in QMutex::unlock() () at /usr/lib64/libQt5Core.so.5
#1  0x00007ffa553cb057 in  () at /usr/lib64/libQt5Core.so.5
#2  0x00007ffa4f860711 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007ffa4f860cb0 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007ffa4f860e1c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007ffa553cb75b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007ffa55374d0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007ffa551a705a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007ffa5832ed45 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007ffa551ab73e in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#11 0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7ffa3f422700 (LWP 1921)):
#0  0x00007ffa551a3bbc in QMutex::lock() () at /usr/lib64/libQt5Core.so.5
#1  0x00007ffa553cb04b in  () at /usr/lib64/libQt5Core.so.5
#2  0x00007ffa4f860711 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007ffa4f860cb0 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007ffa4f860e1c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007ffa553cb75b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007ffa55374d0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007ffa551a705a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007ffa5585aa45 in  () at /usr/lib64/libQt5DBus.so.5
#9  0x00007ffa551ab73e in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007ffa5436a4e7 in start_thread () at /lib64/libpthread.so.0
#11 0x00007ffa54ab8a2f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7ffa5b5328c0 (LWP 1907)):
[KCrash Handler]
#6  0x00007ffa5533bb81 in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007ffa5533bebc in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007ffa55342141 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007ffa553a357a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#10 0x00007ffa55418c7e in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#11 0x00007ffa5531c3fb in QAbstractItemModel::endRemoveRows() () at /usr/lib64/libQt5Core.so.5
#12 0x00007ff98ffb4fdb in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) () at /usr/lib64/libtaskmanager.so.6
#13 0x00007ff98ffb7979 in  () at /usr/lib64/libtaskmanager.so.6
#14 0x00007ffa553a357a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#15 0x00007ffa55418c1e in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#16 0x00007ffa5531bddb in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#17 0x00007ffa5533fc35 in  () at /usr/lib64/libQt5Core.so.5
#18 0x00007ffa5533fd8c in  () at /usr/lib64/libQt5Core.so.5
#19 0x00007ffa55342120 in  () at /usr/lib64/libQt5Core.so.5
#20 0x00007ffa553a357a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#21 0x00007ffa55418c1e in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#22 0x00007ffa5531bddb in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#23 0x00007ff993446c8f in  () at /usr/lib64/libKF5ItemModels.so.5
#24 0x00007ff993447051 in  () at /usr/lib64/libKF5ItemModels.so.5
#25 0x00007ffa553a357a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#26 0x00007ffa55418c1e in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#27 0x00007ffa5531bddb in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#28 0x00007ffa553377d1 in  () at /usr/lib64/libQt5Core.so.5
#29 0x00007ffa553a357a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#30 0x00007ffa55418c1e in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#31 0x00007ffa5531bddb in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#32 0x00007ff98ffd00de in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib64/libtaskmanager.so.6
#33 0x00007ffa553a367c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#34 0x00007ffa57e51de2 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib64/libKF5WindowSystem.so.5
#35 0x00007ffa3dded8d9 in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007ffa57e4a60c in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib64/libKF5WindowSystem.so.5
#37 0x00007ffa57e4b342 in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib64/libKF5WindowSystem.so.5
#38 0x00007ffa57e4b6a5 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib64/libKF5WindowSystem.so.5
#39 0x00007ffa3dded01d in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007ffa5537396f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#41 0x00007ffa47ff07f0 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#42 0x00007ffa47ff143c in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#43 0x00007ffa553a3f62 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#44 0x00007ffa5639c93c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#45 0x00007ffa563a3cb4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#46 0x00007ffa55376578 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#47 0x00007ffa553788b5 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#48 0x00007ffa553cb323 in  () at /usr/lib64/libQt5Core.so.5
#49 0x00007ffa4f860b57 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#50 0x00007ffa4f860d88 in  () at /usr/lib64/libglib-2.0.so.0
#51 0x00007ffa4f860e1c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#52 0x00007ffa553cb73f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#53 0x00007ffa55374d0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#54 0x00007ffa5537d164 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#55 0x000055605909ecf2 in  ()
#56 0x00007ffa549eb46a in __libc_start_main () at /lib64/libc.so.6
#57 0x000055605909f06a in _start ()

Reported using DrKonqi