Application: plasmashell (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.10.0-rc5+ x86_64
Distribution: Debian GNU/Linux 9.0 (stretch)

-- Information about the crash:
- What I was doing when the application crashed:
Quit transmission and firefox then plasmashell panel disappeared.

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 0x7fa2459c2c40 (LWP 4207))]

Thread 9 (Thread 0x7fa19d71d700 (LWP 4564)):
#0  0x00007fa24e3be010 in g_mutex_unlock (mutex=0x7fa190000990) at ././glib/gthread-posix.c:1349
#1  0x00007fa24e377ed0 in g_main_context_prepare (context=context@entry=0x7fa190000990, priority=priority@entry=0x7fa19d71ccc0) at ././glib/gmain.c:3499
#2  0x00007fa24e37891b in g_main_context_iterate (context=context@entry=0x7fa190000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3909
#3  0x00007fa24e378b0c in g_main_context_iteration (context=0x7fa190000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007fa25331002b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa2532b998a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2530e70f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa2530ebda8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa2521ff424 in start_thread (arg=0x7fa19d71d700) at pthread_create.c:333
#9  0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7fa19df1e700 (LWP 4563)):
#0  0x00007fa24e3bdfe9 in g_mutex_lock (mutex=mutex@entry=0x7fa198000990) at ././glib/gthread-posix.c:1336
#1  0x00007fa24e378576 in g_main_context_dispatch (context=context@entry=0x7fa198000990) at ././glib/gmain.c:3850
#2  0x00007fa24e378a60 in g_main_context_iterate (context=context@entry=0x7fa198000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#3  0x00007fa24e378b0c in g_main_context_iteration (context=0x7fa198000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007fa25331002b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa2532b998a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2530e70f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa19e36ea35 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x00007fa2530ebda8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fa2521ff424 in start_thread (arg=0x7fa19df1e700) at pthread_create.c:333
#10 0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7fa22db54700 (LWP 4559)):
#0  0x00007fa25220514f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa22f00d40b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fa22f00d267 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007fa2521ff424 in start_thread (arg=0x7fa22db54700) at pthread_create.c:333
#4  0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7fa238bb7700 (LWP 4558)):
#0  0x00007fa25220514f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa257b6c2c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fa257b6c309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fa2521ff424 in start_thread (arg=0x7fa238bb7700) at pthread_create.c:333
#4  0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7fa23a9b7700 (LWP 4557)):
#0  0x00007fa2529f85bd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fa24e3bcc40 in read (__nbytes=16, __buf=0x7fa23a9b6bc0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007fa24e3bcc40 in g_wakeup_acknowledge (wakeup=0x7fa230002390) at ././glib/gwakeup.c:210
#3  0x00007fa24e3784be in g_main_context_check (context=context@entry=0x7fa228000990, max_priority=2147483647, fds=fds@entry=0x7fa228003070, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x00007fa24e378994 in g_main_context_iterate (context=context@entry=0x7fa228000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x00007fa24e378b0c in g_main_context_iteration (context=0x7fa228000990, may_block=1) at ././glib/gmain.c:3990
#6  0x00007fa25331002b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa2532b998a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa2530e70f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fa2559796a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fa2530ebda8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fa2521ff424 in start_thread (arg=0x7fa23a9b7700) at pthread_create.c:333
#12 0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7fa23bfff700 (LWP 4392)):
#0  0x00007fa2529fc54d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fa24e3789f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7fa230002e70, timeout=<optimized out>, context=0x7fa230000990) at ././glib/gmain.c:4228
#2  0x00007fa24e3789f6 in g_main_context_iterate (context=context@entry=0x7fa230000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007fa24e378b0c in g_main_context_iteration (context=0x7fa230000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007fa25331002b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa2532b998a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2530e70f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa2559796a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fa2530ebda8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fa2521ff424 in start_thread (arg=0x7fa23bfff700) at pthread_create.c:333
#10 0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fa2428a9700 (LWP 4329)):
#0  0x00007fa2529fc54d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fa24e3789f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7fa234011bc0, timeout=<optimized out>, context=0x7fa234000990) at ././glib/gmain.c:4228
#2  0x00007fa24e3789f6 in g_main_context_iterate (context=context@entry=0x7fa234000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007fa24e378b0c in g_main_context_iteration (context=0x7fa234000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007fa25331002b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa2532b998a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2530e70f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa2582306d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007fa2530ebda8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fa2521ff424 in start_thread (arg=0x7fa2428a9700) at pthread_create.c:333
#10 0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fa243c11700 (LWP 4327)):
#0  0x00007fa2529fc54d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fa256ac3150 in poll (__timeout=-1, __nfds=1, __fds=0x7fa243c10d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007fa256ac3150 in _xcb_conn_wait (c=c@entry=0x56487f41e370, cond=cond@entry=0x56487f41e3b0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007fa256ac4ee9 in xcb_wait_for_event (c=0x56487f41e370) at ../../src/xcb_in.c:693
#4  0x00007fa245732b69 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007fa2530ebda8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2521ff424 in start_thread (arg=0x7fa243c11700) at pthread_create.c:333
#7  0x00007fa252a059bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fa2459c2c40 (LWP 4207)):
[KCrash Handler]
#6  0x00007fa253281d90 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa253282079 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa25328a069 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fa2532e75a9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fa25335e8e4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fa2532630eb in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fa19f99d508 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#13 0x00007fa19f9a0599 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x00007fa2532e75a9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fa25335e874 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fa253262993 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fa2532877b5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fa2532879b4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fa25328a048 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fa2532e75a9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fa25335e874 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fa253262993 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fa1a148a265 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#24 0x00007fa1a148b711 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#25 0x00007fa2532e75a9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fa25335e874 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fa253262993 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fa25327cf90 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fa2532e75a9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fa25335e874 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fa253262993 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007fa19f9b72f3 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#33 0x00007fa2532e791e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fa25549c2e2 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#35 0x00007fa240512a66 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007fa255494632 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#37 0x00007fa25549565c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#38 0x00007fa255495982 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#39 0x00007fa240512196 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007fa2532b8acf in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007fa245734334 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007fa245735015 in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#43 0x00007fa2532e8459 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007fa253b9eb8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007fa253ba6341 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007fa2532bb9a0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007fa2532be12d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007fa25330fc03 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007fa24e3787f7 in g_main_dispatch (context=0x7fa23c0016f0) at ././glib/gmain.c:3203
#50 0x00007fa24e3787f7 in g_main_context_dispatch (context=context@entry=0x7fa23c0016f0) at ././glib/gmain.c:3856
#51 0x00007fa24e378a60 in g_main_context_iterate (context=context@entry=0x7fa23c0016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#52 0x00007fa24e378b0c in g_main_context_iteration (context=0x7fa23c0016f0, may_block=1) at ././glib/gmain.c:3990
#53 0x00007fa25331000f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007fa2532b998a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007fa2532c20fc in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x000056487d606db2 in  ()
#57 0x00007fa25293d2b1 in __libc_start_main (main=0x56487d606250, argc=2, argv=0x7ffd8a930ce8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd8a930cd8) at ../csu/libc-start.c:291
#58 0x000056487d60713a in _start ()

Reported using DrKonqi