Application: plasmashell (5.7.4)

Qt Version: 5.6.1
Frameworks Version: 5.25.0
Operating System: Linux 4.8.0-rc7+ x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
when I quit chromium previously the panel disappeared and reappeared but on this occasion when I quit chromium plasma crashed and I had the option to report the bug.

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 0x7f9c7ac857c0 (LWP 4075))]

Thread 9 (Thread 0x7f9bd3fff700 (LWP 4266)):
#0  0x0000003011d59832 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x0000003011ed90c9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000003011ed9675 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x0000003011edaa0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x0000003003c49ed9 in g_main_context_prepare (context=context@entry=0x7f9bcc000990, priority=priority@entry=0x7f9bd3ffecc0) at ././glib/gmain.c:3499
#5  0x0000003003c4a8fb in g_main_context_iterate (context=context@entry=0x7f9bcc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3907
#6  0x0000003003c4aaec in g_main_context_iteration (context=0x7f9bcc000990, may_block=1) at ././glib/gmain.c:3988
#7  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x0000003000c07464 in start_thread (arg=0x7f9bd3fff700) at pthread_create.c:333
#12 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f9bd885e700 (LWP 4265)):
#0  0x0000003003c90009 in g_mutex_lock (mutex=mutex@entry=0x7f9bd4000990) at ././glib/gthread-posix.c:1336
#1  0x0000003003c4a121 in g_main_context_query (context=context@entry=0x7f9bd4000990, max_priority=2147483647, timeout=timeout@entry=0x7f9bd885dca4, fds=fds@entry=0x7f9bd40013c0, n_fds=n_fds@entry=1) at ././glib/gmain.c:3604
#2  0x0000003003c4a948 in g_main_context_iterate (context=context@entry=0x7f9bd4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x0000003003c4aaec in g_main_context_iteration (context=0x7f9bd4000990, may_block=1) at ././glib/gmain.c:3988
#4  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9bd88b1b45 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7f9bd885e700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f9c65b40700 (LWP 4224)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9c66622493 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f9c66621bd7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x0000003000c07464 in start_thread (arg=0x7f9c65b40700) at pthread_create.c:333
#4  0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f9c67df7700 (LWP 4223)):
#0  0x0000003000c0d18f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003061f7c574 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x0000003061f7c5b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x0000003000c07464 in start_thread (arg=0x7f9c67df7700) at pthread_create.c:333
#4  0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f9c7197b700 (LWP 4214)):
#0  0x00000030004db57d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x0000003003c8ec60 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f9c7197abc0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x0000003003c8ec60 in g_wakeup_acknowledge (wakeup=0x7f9c68002390) at ././glib/gwakeup.c:210
#3  0x0000003003c4a485 in g_main_context_check (context=context@entry=0x7f9c60000990, max_priority=2147483647, fds=fds@entry=0x7f9c60003070, n_fds=n_fds@entry=1) at ././glib/gmain.c:3705
#4  0x0000003003c4a974 in g_main_context_iterate (context=context@entry=0x7f9c60000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#5  0x0000003003c4aaec in g_main_context_iteration (context=0x7f9c60000990, may_block=1) at ././glib/gmain.c:3988
#6  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x000000303bcc8a55 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x0000003000c07464 in start_thread (arg=0x7f9c7197b700) at pthread_create.c:333
#12 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f9c72fc4700 (LWP 4108)):
#0  0x0000003003c90024 in g_mutex_unlock (mutex=0x7f9c68000990) at ././glib/gthread-posix.c:1348
#1  0x0000003003c4a3c1 in g_main_context_check (context=context@entry=0x7f9c68000990, max_priority=2147483647, fds=fds@entry=0x7f9c68002e70, n_fds=n_fds@entry=1) at ././glib/gmain.c:3758
#2  0x0000003003c4a974 in g_main_context_iterate (context=context@entry=0x7f9c68000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x0000003003c4aaec in g_main_context_iteration (context=0x7f9c68000990, may_block=1) at ././glib/gmain.c:3988
#4  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x000000303bcc8a55 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003000c07464 in start_thread (arg=0x7f9c72fc4700) at pthread_create.c:333
#10 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f9c7996d700 (LWP 4081)):
#0  0x00000030004db57d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x0000003003c8ec60 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f9c7996cbb0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x0000003003c8ec60 in g_wakeup_acknowledge (wakeup=0x7f9c740015b0) at ././glib/gwakeup.c:210
#3  0x0000003003c4a485 in g_main_context_check (context=context@entry=0x7f9c6c000990, max_priority=2147483647, fds=fds@entry=0x7f9c6c010c90, n_fds=n_fds@entry=1) at ././glib/gmain.c:3705
#4  0x0000003003c4a974 in g_main_context_iterate (context=context@entry=0x7f9c6c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#5  0x0000003003c4aaec in g_main_context_iteration (context=0x7f9c6c000990, may_block=1) at ././glib/gmain.c:3988
#6  0x0000003011edb51b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003011ca8e53 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003014c15525 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x0000003000c07464 in start_thread (arg=0x7f9c7996d700) at pthread_create.c:333
#12 0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f9c7a3a0700 (LWP 4080)):
#0  0x00000030004df50d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300340a340 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7f9c7a39fd00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x000000300340a340 in _xcb_conn_wait (c=c@entry=0x21d77d0, cond=cond@entry=0x21d7810, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x000000300340bf39 in xcb_wait_for_event (c=0x21d77d0) at ../../src/xcb_in.c:693
#4  0x00007f9c7aa02a79 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x0000003011cadd78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000003000c07464 in start_thread (arg=0x7f9c7a3a0700) at pthread_create.c:333
#7  0x00000030004e897f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f9c7ac857c0 (LWP 4075)):
[KCrash Handler]
#6  0x0000003011e4b2c0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000003011e4b551 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000003011e53949 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x0000003011eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x0000003011f2c6c4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x0000003011e2bf2b in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f9bd9a61e18 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#13 0x00007f9bd9a64de9 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x0000003011eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x0000003011f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x0000003011e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x0000003011e510a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x0000003011e512a4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x0000003011e53928 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x0000003011eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x0000003011f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x0000003011e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x000000303b0121a5 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#24 0x000000303b013661 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#25 0x0000003011eb2bd9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x0000003011f2c654 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x0000003011e2b7d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f9bd9a7ad83 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#29 0x0000003011eb2c7c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x000000301a03e092 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#31 0x00007f9c733e3ad5 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#32 0x000000301a036572 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#33 0x000000301a03759c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#34 0x000000301a0378c2 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#35 0x00007f9c733e3206 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x0000003011e822df in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f9c7aa04455 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#38 0x00007f9c7aa053eb in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#39 0x0000003011eb3729 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x0000003014f5cbec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x0000003014f6208f in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x0000003011e85450 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x0000003011e873cc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x0000003011edb0f3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x0000003003c4a7d7 in g_main_context_dispatch (context=0x7f9c740016f0) at ././glib/gmain.c:3201
#46 0x0000003003c4a7d7 in g_main_context_dispatch (context=context@entry=0x7f9c740016f0) at ././glib/gmain.c:3854
#47 0x0000003003c4aa40 in g_main_context_iterate (context=context@entry=0x7f9c740016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3927
#48 0x0000003003c4aaec in g_main_context_iteration (context=0x7f9c740016f0, may_block=1) at ././glib/gmain.c:3988
#49 0x0000003011edb4ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x0000003011e8319a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x0000003011e8b99c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x000000000041b53f in  ()
#53 0x00000030004202b1 in __libc_start_main (main=0x41a9d0, argc=2, argv=0x7fff92afcb08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff92afcaf8) at ../csu/libc-start.c:291
#54 0x000000000041b8b9 in _start ()

Reported using DrKonqi