Application: plasmashell (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.11.0-rc1+ x86_64
Distribution: Debian GNU/Linux 9.0 (stretch)

-- Information about the crash:
I had hit control-Q in firefox to quit it (about 1000 tabs open) and it caused plasmashell to crash and restart.

The crash can be reproduced sometimes.

-- 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 0x7f206b73df00 (LWP 4254))]

Thread 10 (Thread 0x7f1fb9319700 (LWP 24758)):
#0  0x00007f207899554d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20743119f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f1fa00174a0, timeout=<optimized out>, context=0x7f1fa0001200) at ././glib/gmain.c:4228
#2  0x00007f20743119f6 in g_main_context_iterate (context=context@entry=0x7f1fa0001200, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f2074311b0c in g_main_context_iteration (context=0x7f1fa0001200, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f20792a906b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20790800f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f207c29c406 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f2078198424 in start_thread (arg=0x7f1fb9319700) at pthread_create.c:333
#10 0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7f1fc3303700 (LWP 4512)):
#0  0x00007f20743570c9 in g_mutex_lock (mutex=mutex@entry=0x7f1fb4000990) at ././glib/gthread-posix.c:1336
#1  0x00007f2074310ee9 in g_main_context_prepare (context=context@entry=0x7f1fb4000990, priority=priority@entry=0x7f1fc3302cc0) at ././glib/gmain.c:3504
#2  0x00007f207431191b in g_main_context_iterate (context=context@entry=0x7f1fb4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x00007f2074311b0c in g_main_context_iteration (context=0x7f1fb4000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f20792a906b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20790800f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f2078198424 in start_thread (arg=0x7f1fc3303700) at pthread_create.c:333
#9  0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f1fc3b04700 (LWP 4511)):
#0  0x00007f207899554d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20743119f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f1fbc0013c0, timeout=<optimized out>, context=0x7f1fbc000990) at ././glib/gmain.c:4228
#2  0x00007f20743119f6 in g_main_context_iterate (context=context@entry=0x7f1fbc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f2074311b0c in g_main_context_iteration (context=0x7f1fbc000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f20792a906b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20790800f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1fc3f55a35 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f2078198424 in start_thread (arg=0x7f1fc3b04700) at pthread_create.c:333
#10 0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f1fcc9b8700 (LWP 4467)):
#0  0x00007f207819e14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f2058d7e59b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x0000000000000000 in  ()

Thread 6 (Thread 0x7f205a7b0700 (LWP 4445)):
#0  0x00007f207819e14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f207db052c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f207db05309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f2078198424 in start_thread (arg=0x7f205a7b0700) at pthread_create.c:333
#4  0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f205bfff700 (LWP 4397)):
#0  0x00007f207899554d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20743119f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f2050003070, timeout=<optimized out>, context=0x7f2050000990) at ././glib/gmain.c:4228
#2  0x00007f20743119f6 in g_main_context_iterate (context=context@entry=0x7f2050000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f2074311b0c in g_main_context_iteration (context=0x7f2050000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f20792a906b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20790800f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f207b9126a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f2078198424 in start_thread (arg=0x7f205bfff700) at pthread_create.c:333
#10 0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f2061c9e700 (LWP 4348)):
#0  0x00007fff20d8c949 in  ()
#1  0x00007fff20d8cbda in clock_gettime ()
#2  0x00007f20789ab856 in __GI___clock_gettime (clock_id=1, tp=0x7f2061c9db40) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007f207912a091 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f20792a6ce9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20792a7295 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20792a863e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2074310edd in g_main_context_prepare (context=context@entry=0x7f2054000990, priority=priority@entry=0x7f2061c9dca0) at ././glib/gmain.c:3501
#8  0x00007f207431191b in g_main_context_iterate (context=context@entry=0x7f2054000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#9  0x00007f2074311b0c in g_main_context_iteration (context=0x7f2054000990, may_block=1) at ././glib/gmain.c:3990
#10 0x00007f20792a906b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f20790800f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f207b9126a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f2078198424 in start_thread (arg=0x7f2061c9e700) at pthread_create.c:333
#16 0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f2063fff700 (LWP 4303)):
#0  0x00007f207430e997 in g_source_iter_next (iter=iter@entry=0x7f2063ffec10, source=source@entry=0x7f2063ffec08) at ././glib/gmain.c:953
#1  0x00007f2074310e7b in g_main_context_prepare (context=context@entry=0x7f205c000990, priority=priority@entry=0x7f2063ffec90) at ././glib/gmain.c:3479
#2  0x00007f207431191b in g_main_context_iterate (context=context@entry=0x7f205c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x00007f2074311b0c in g_main_context_iteration (context=0x7f205c000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f20792a906b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20790800f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f207e1c86d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f2078198424 in start_thread (arg=0x7f2063fff700) at pthread_create.c:333
#10 0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f206998c700 (LWP 4301)):
#0  0x00007f207899554d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f207ca5c150 in poll (__timeout=-1, __nfds=1, __fds=0x7f206998bd00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007f207ca5c150 in _xcb_conn_wait (c=c@entry=0x55b660a68380, cond=cond@entry=0x55b660a683c0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007f207ca5dee9 in xcb_wait_for_event (c=0x55b660a68380) at ../../src/xcb_in.c:693
#4  0x00007f206b4adb69 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007f2079084da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f2078198424 in start_thread (arg=0x7f206998c700) at pthread_create.c:333
#7  0x00007f207899e9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f206b73df00 (LWP 4254)):
[KCrash Handler]
#6  0x00007f207921add0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f207921b0b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f20792230a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f20792805e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f20792f7924 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f20791fc12b in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f1fc5593508 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#13 0x00007f1fc5596599 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x00007f20792805e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f20792f78b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f20791fb9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f20792207f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f20792209f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f2079223088 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f20792805e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f20792f78b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f20791fb9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f1fc7085265 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#24 0x00007f1fc7086711 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#25 0x00007f20792805e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f20792f78b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f20791fb9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f2079215fd0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f20792805e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f20792f78b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f20791fb9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f1fc55ad2f3 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#33 0x00007f207928095e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f207b4352e2 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#35 0x00007f20620bda66 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007f207b42d632 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#37 0x00007f207b42e65c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#38 0x00007f207b42e982 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#39 0x00007f20620bd196 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007f2079251b0f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007f206b4af334 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007f206b4b0015 in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#43 0x00007f2079281499 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007f2079b37b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007f2079b3f341 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007f20792549e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f207925716d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007f20792a8c43 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007f20743117f7 in g_main_dispatch (context=0x7f20640016f0) at ././glib/gmain.c:3203
#50 0x00007f20743117f7 in g_main_context_dispatch (context=context@entry=0x7f20640016f0) at ././glib/gmain.c:3856
#51 0x00007f2074311a60 in g_main_context_iterate (context=context@entry=0x7f20640016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#52 0x00007f2074311b0c in g_main_context_iteration (context=0x7f20640016f0, may_block=1) at ././glib/gmain.c:3990
#53 0x00007f20792a904f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007f20792529ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007f207925b13c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x000055b65fecadb2 in  ()
#57 0x00007f20788d62b1 in __libc_start_main (main=0x55b65feca250, argc=2, argv=0x7fff20cf7fa8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff20cf7f98) at ../csu/libc-start.c:291
#58 0x000055b65fecb13a in _start ()

Reported using DrKonqi