Application: plasmashell (5.8.2)

Qt Version: 5.6.1
Frameworks Version: 5.27.0
Operating System: Linux 4.9.0-rc1+ x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
When I quit chromium that had several windows/tabs open for several hours, the panel also crashed then restarted.

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 0x7f87d224e200 (LWP 3968))]

Thread 9 (Thread 0x7f872bfff700 (LWP 4339)):
#0  0x00000030004db5dd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300388ec80 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f872bffebe0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x000000300388ec80 in g_wakeup_acknowledge (wakeup=0x7f872c002570) at ././glib/gwakeup.c:210
#3  0x000000300384a485 in g_main_context_check (context=context@entry=0x7f8724000990, max_priority=2147483647, fds=fds@entry=0x7f8724002e70, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x000000300384a974 in g_main_context_iterate (context=context@entry=0x7f8724000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x000000300384aaec in g_main_context_iteration (context=0x7f8724000990, may_block=1) at ././glib/gmain.c:3990
#6  0x0000003010edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003010e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003010ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003010cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x0000003000c07464 in start_thread (arg=0x7f872bfff700) at pthread_create.c:333
#11 0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f8730cb1700 (LWP 4338)):
#0  0x00000030004df56d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300384a9d6 in g_main_context_iterate (priority=<optimized out>, n_fds=1, fds=0x7f872c0013c0, timeout=<optimized out>, context=0x7f872c000990) at ././glib/gmain.c:4228
#2  0x000000300384a9d6 in g_main_context_iterate (context=context@entry=0x7f872c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x000000300384aaec in g_main_context_iteration (context=0x7f872c000990, may_block=1) at ././glib/gmain.c:3990
#4  0x0000003010edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003010e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003010ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8730d04b45 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x0000003010cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7f8730cb1700) at pthread_create.c:333
#10 0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f87bd0fb700 (LWP 4330)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f87bdbdd493 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f87bdbdcbd7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x0000003000c07464 in start_thread (arg=0x7f87bd0fb700) at pthread_create.c:333
#4  0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f87bf3df700 (LWP 4328)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x000000305457c574 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x000000305457c5b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x0000003000c07464 in start_thread (arg=0x7f87bf3df700) at pthread_create.c:333
#4  0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f87c8f0c700 (LWP 4325)):
#0  0x0000003003890044 in g_mutex_unlock (mutex=0x7f87b8000990) at ././glib/gthread-posix.c:1348
#1  0x000000300384a9ca in g_main_context_iterate (priority=<optimized out>, n_fds=1, fds=0x7f87b8003070, timeout=<optimized out>, context=0x7f87b8000990) at ././glib/gmain.c:4227
#2  0x000000300384a9ca in g_main_context_iterate (context=context@entry=0x7f87b8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x000000300384aaec in g_main_context_iteration (context=0x7f87b8000990, may_block=1) at ././glib/gmain.c:3990
#4  0x0000003010edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003010e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003010ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x000000303a8c8a55 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x0000003010cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7f87c8f0c700) at pthread_create.c:333
#10 0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f87ca6b1700 (LWP 4247)):
#0  0x0000003003890029 in g_mutex_lock (mutex=mutex@entry=0x7f87c0000990) at ././glib/gthread-posix.c:1336
#1  0x00000030038498c0 in g_main_context_acquire (context=0x7f87c0000990) at ././glib/gmain.c:3264
#2  0x000000300384a885 in g_main_context_iterate (context=context@entry=0x7f87c0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3879
#3  0x000000300384aaec in g_main_context_iteration (context=0x7f87c0000990, may_block=1) at ././glib/gmain.c:3990
#4  0x0000003010edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003010e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003010ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x000000303a8c8a55 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x0000003010cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7f87ca6b1700) at pthread_create.c:333
#10 0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f87d0f35700 (LWP 4040)):
#0  0x0000003003890029 in g_mutex_lock (mutex=mutex@entry=0x7f87c4000990) at ././glib/gthread-posix.c:1336
#1  0x0000003003849ee5 in g_main_context_prepare (context=context@entry=0x7f87c4000990, priority=priority@entry=0x7f87d0f34c90) at ././glib/gmain.c:3504
#2  0x000000300384a8fb in g_main_context_iterate (context=context@entry=0x7f87c4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x000000300384aaec in g_main_context_iteration (context=0x7f87c4000990, may_block=1) at ././glib/gmain.c:3990
#4  0x0000003010edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003010e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003010ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003014815525 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x0000003010cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7f87d0f35700) at pthread_create.c:333
#10 0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f87d1968700 (LWP 4039)):
#0  0x00000030004df56d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300340c150 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7f87d1967d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x000000300340c150 in _xcb_conn_wait (c=c@entry=0x176df00, cond=cond@entry=0x176df40, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x000000300340dee9 in xcb_wait_for_event (c=0x176df00) at ../../src/xcb_in.c:693
#4  0x00007f87d1fcaa79 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x0000003010cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003000c07464 in start_thread (arg=0x7f87d1968700) at pthread_create.c:333
#7  0x00000030004e89df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f87d224e200 (LWP 3968)):
[KCrash Handler]
#6  0x0000003010e4b2c0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003010e4b551 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003010e53949 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003010eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x0000003010f2c6c4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x0000003010e2bf2b in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f8731f10048 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#13 0x00007f8731f130f9 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x0000003010eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x0000003010f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x0000003010e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x0000003010e510a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x0000003010e512a4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x0000003010e53928 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x0000003010eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x0000003010f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x0000003010e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x0000003039612265 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#24 0x0000003039613721 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#25 0x0000003010eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x0000003010f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x0000003010e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x0000003010e46340 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x0000003010eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x0000003010f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x0000003010e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f8731f29e93 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#33 0x0000003010eb2c7c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x000000301883e082 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#35 0x00007f87caad0ac6 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x0000003018836562 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#37 0x000000301883758c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#38 0x00000030188378b2 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#39 0x00007f87caad01f6 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x0000003010e822df in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007f87d1fcc455 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007f87d1fcd3eb in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#43 0x0000003010eb3729 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x0000003014b5cbec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x0000003014b6208f in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x0000003010e85450 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x0000003010e873cc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x0000003010edb0f3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x000000300384a7d7 in g_main_context_dispatch (context=0x7f87cc0016f0) at ././glib/gmain.c:3203
#50 0x000000300384a7d7 in g_main_context_dispatch (context=context@entry=0x7f87cc0016f0) at ././glib/gmain.c:3856
#51 0x000000300384aa40 in g_main_context_iterate (context=context@entry=0x7f87cc0016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#52 0x000000300384aaec in g_main_context_iteration (context=0x7f87cc0016f0, may_block=1) at ././glib/gmain.c:3990
#53 0x0000003010edb4ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x0000003010e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x0000003010e8b99c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x000000000041c8d4 in  ()
#57 0x00000030004202b1 in __libc_start_main (main=0x41bd60, argc=2, argv=0x7ffdb3e605c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdb3e605b8) at ../csu/libc-start.c:291
#58 0x000000000041cc5a in _start ()

Reported using DrKonqi