Application: plasmashell (5.8.6)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.11.0-rc8+ x86_64
Distribution: Debian GNU/Linux 9.0 (stretch)

-- Information about the crash:
quitting firefox (about 20 windows / 1000 tabs open) 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 0x7f56c09fa7c0 (LWP 4191))]

Thread 12 (Thread 0x7f560ffff700 (LWP 4540)):
#0  0x00007f56c9615104 in g_mutex_unlock (mutex=0x7f5608000990) at ././glib/gthread-posix.c:1348
#1  0x00007f56c95ceed0 in g_main_context_prepare (context=context@entry=0x7f5608000990, priority=priority@entry=0x7f560fffecc0) at ././glib/gmain.c:3499
#2  0x00007f56c95cf91b in g_main_context_iterate (context=context@entry=0x7f5608000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x00007f56c95cfb0c in g_main_context_iteration (context=0x7f5608000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f56ce56606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f56ce50f9ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f56ce33d0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f56ce341da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f56cd455494 in start_thread (arg=0x7f560ffff700) at pthread_create.c:333
#9  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 11 (Thread 0x7f5614fd1700 (LWP 4539)):
#0  0x00007f56cdc524ed in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56c95cf9f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f56100013c0, timeout=<optimized out>, context=0x7f5610000990) at ././glib/gmain.c:4228
#2  0x00007f56c95cf9f6 in g_main_context_iterate (context=context@entry=0x7f5610000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f56c95cfb0c in g_main_context_iteration (context=0x7f5610000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f56ce56606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f56ce50f9ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f56ce33d0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5615421a35 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x00007f56ce341da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f56cd455494 in start_thread (arg=0x7f5614fd1700) at pthread_create.c:333
#10 0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 10 (Thread 0x7f562003b700 (LWP 4486)):
#0  0x00007f56cd45b15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f56aa5687c3 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f56aa568627 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f56cd455494 in start_thread (arg=0x7f562003b700) at pthread_create.c:333
#4  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 9 (Thread 0x7f562083c700 (LWP 4485)):
#0  0x00007f56cd45b15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f56aa5687c3 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f56aa568627 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f56cd455494 in start_thread (arg=0x7f562083c700) at pthread_create.c:333
#4  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 8 (Thread 0x7f562103d700 (LWP 4484)):
#0  0x00007f56cd45b15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f56aa5687c3 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f56aa568627 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f56cd455494 in start_thread (arg=0x7f562103d700) at pthread_create.c:333
#4  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 7 (Thread 0x7f56a8fab700 (LWP 4483)):
#0  0x00007f56cd45b15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f56aa5687c3 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f56aa568627 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f56cd455494 in start_thread (arg=0x7f56a8fab700) at pthread_create.c:333
#4  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 6 (Thread 0x7f56abbe1700 (LWP 4480)):
#0  0x00007f56cd45b15f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f56d2fd02c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f56d2fd0309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f56cd455494 in start_thread (arg=0x7f56abbe1700) at pthread_create.c:333
#4  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 5 (Thread 0x7f56b5b99700 (LWP 4479)):
#0  0x00007f56cdc4e55d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56c9613d40 in read (__nbytes=16, __buf=0x7f56b5b98bc0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f56c9613d40 in g_wakeup_acknowledge (wakeup=0x7f56ac002390) at ././glib/gwakeup.c:210
#3  0x00007f56c95cf4be in g_main_context_check (context=context@entry=0x7f56a4000990, max_priority=2147483647, fds=fds@entry=0x7f56a4003070, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x00007f56c95cf994 in g_main_context_iterate (context=context@entry=0x7f56a4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x00007f56c95cfb0c in g_main_context_iteration (context=0x7f56a4000990, may_block=1) at ././glib/gmain.c:3990
#6  0x00007f56ce56606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f56ce50f9ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f56ce33d0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f56d0bce6a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f56ce341da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f56cd455494 in start_thread (arg=0x7f56b5b99700) at pthread_create.c:333
#12 0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 4 (Thread 0x7f56b71e2700 (LWP 4381)):
#0  0x00007f56c9615104 in g_mutex_unlock (mutex=0x7f56ac000990) at ././glib/gthread-posix.c:1348
#1  0x00007f56c95ce92e in g_main_context_acquire (context=0x7f56ac000990) at ././glib/gmain.c:3283
#2  0x00007f56c95cf8a5 in g_main_context_iterate (context=context@entry=0x7f56ac000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3879
#3  0x00007f56c95cfb0c in g_main_context_iteration (context=0x7f56ac000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f56ce56606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f56ce50f9ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f56ce33d0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f56d0bce6a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f56ce341da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f56cd455494 in start_thread (arg=0x7f56b71e2700) at pthread_create.c:333
#10 0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 3 (Thread 0x7f56bdaf5700 (LWP 4217)):
#0  0x00007f56cdc4e55d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56c9613d40 in read (__nbytes=16, __buf=0x7f56bdaf4bb0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f56c9613d40 in g_wakeup_acknowledge (wakeup=0x7f56b80015c0) at ././glib/gwakeup.c:210
#3  0x00007f56c95cf4be in g_main_context_check (context=context@entry=0x7f56b0000990, max_priority=2147483647, fds=fds@entry=0x7f56b0011b60, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x00007f56c95cf994 in g_main_context_iterate (context=context@entry=0x7f56b0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x00007f56c95cfb0c in g_main_context_iteration (context=0x7f56b0000990, may_block=1) at ././glib/gmain.c:3990
#6  0x00007f56ce56606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f56ce50f9ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f56ce33d0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f56d36946d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007f56ce341da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f56cd455494 in start_thread (arg=0x7f56bdaf5700) at pthread_create.c:333
#12 0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 2 (Thread 0x7f56bee5d700 (LWP 4209)):
#0  0x00007f56cdc524ed in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56d1f27150 in poll (__timeout=-1, __nfds=1, __fds=0x7f56bee5cd00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007f56d1f27150 in _xcb_conn_wait (c=c@entry=0x555b87fafda0, cond=cond@entry=0x555b87fafde0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007f56d1f28ee9 in xcb_wait_for_event (c=0x555b87fafda0) at ../../src/xcb_in.c:693
#4  0x00007f56c076db69 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007f56ce341da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f56cd455494 in start_thread (arg=0x7f56bee5d700) at pthread_create.c:333
#7  0x00007f56cdc5b93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 1 (Thread 0x7f56c09fa7c0 (LWP 4191)):
[KCrash Handler]
#6  0x00007f56ce4d7dd0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f56ce4d80b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f56ce4e00a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f56ce53d5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f56ce5b4924 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f56ce4b912b in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f5616a53438 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#13 0x00007f5616a564c9 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x00007f56ce53d5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f56ce5b48b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f56ce4b89d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f56ce4dd7f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f56ce4dd9f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f56ce4e0088 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f56ce53d5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f56ce5b48b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f56ce4b89d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f56184fe265 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#24 0x00007f56184ff6b1 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#25 0x00007f56ce53d5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f56ce5b48b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f56ce4b89d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f56ce4d2fd0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f56ce53d5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f56ce5b48b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f56ce4b89d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f5616a6d148 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#33 0x00007f56ce53d95e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f56d06f1212 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#35 0x00007f56bc16ea36 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007f56d06e9562 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#37 0x00007f56d06ea58c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#38 0x00007f56d06ea8b5 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#39 0x00007f56bc16e166 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007f56ce50eb0f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007f56c076f334 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007f56c0770015 in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#43 0x00007f56ce53e499 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007f56cedf4b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007f56cedfc341 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007f56ce5119e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f56ce51416d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007f56ce565c43 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007f56c95cf7f7 in g_main_dispatch (context=0x7f56b80016f0) at ././glib/gmain.c:3203
#50 0x00007f56c95cf7f7 in g_main_context_dispatch (context=context@entry=0x7f56b80016f0) at ././glib/gmain.c:3856
#51 0x00007f56c95cfa60 in g_main_context_iterate (context=context@entry=0x7f56b80016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#52 0x00007f56c95cfb0c in g_main_context_iteration (context=0x7f56b80016f0, may_block=1) at ././glib/gmain.c:3990
#53 0x00007f56ce56604f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007f56ce50f9ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007f56ce51813c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x0000555b87384072 in  ()
#57 0x00007f56cdb932b1 in __libc_start_main (main=0x555b87383510, argc=2, argv=0x7ffe7829bf98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe7829bf88) at ../csu/libc-start.c:291
#58 0x0000555b873843fa in _start ()

Reported using DrKonqi