Bug 362798

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-21-generic x86_64
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
This happens from time to time - but every day. I couldn't find a relation to my actions.

- Unusual behavior I noticed:
I have several problems regarding graphics, probably kwin or ksystemsettings. See my bugreports #362720 #362726 and #362728.

I've got quite new Hardware (Thinkpad T560) don't know wether it could be related to that. I hope you can find something in the technical details. The program said it's useful...

Thanks for your work - by the way!

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 0x7f20a20348c0 (LWP 2640))]

Thread 8 (Thread 0x7f208d1f3700 (LWP 2643)):
#0  0x00007f209c73ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20a07ffc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f20a08018d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f208f341629 in QXcbEventReader::run (this=0x2440860) at qxcbconnection.cpp:1253
#4  0x00007f209ce3084e in QThreadPrivate::start (arg=0x2440860) at thread/qthread_unix.cpp:331
#5  0x00007f209bf1d6fa in start_thread (arg=0x7f208d1f3700) at pthread_create.c:333
#6  0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f20868fe700 (LWP 2645)):
#0  0x00007f2099514a64 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f20994d0311 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20994d042c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f209d067a9b in QEventDispatcherGlib::processEvents (this=0x7f20800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f209d00edea in QEventLoop::exec (this=this@entry=0x7f20868fdce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f209ce2b8a4 in QThread::exec (this=this@entry=0x251d980) at thread/qthread.cpp:503
#6  0x00007f209f6d33c5 in QQmlThreadPrivate::run (this=0x251d980) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f209ce3084e in QThreadPrivate::start (arg=0x251d980) at thread/qthread_unix.cpp:331
#8  0x00007f209bf1d6fa in start_thread (arg=0x7f20868fe700) at pthread_create.c:333
#9  0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f207b34d700 (LWP 2646)):
#0  0x00007f209c73ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20994d031c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20994d042c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f209d067a9b in QEventDispatcherGlib::processEvents (this=0x7f20740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f209d00edea in QEventLoop::exec (this=this@entry=0x7f207b34cce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f209ce2b8a4 in QThread::exec (this=this@entry=0x2891420) at thread/qthread.cpp:503
#6  0x00007f209f6d33c5 in QQmlThreadPrivate::run (this=0x2891420) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f209ce3084e in QThreadPrivate::start (arg=0x2891420) at thread/qthread_unix.cpp:331
#8  0x00007f209bf1d6fa in start_thread (arg=0x7f207b34d700) at pthread_create.c:333
#9  0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f2079479700 (LWP 2647)):
#0  update_get_addr (ti=0x7f209d25b788) at dl-tls.c:807
#1  0x00007f209ce2f792 in get_thread_data () at thread/qthread_unix.cpp:181
#2  QThreadData::current (createIfNecessary=createIfNecessary@entry=true) at thread/qthread_unix.cpp:212
#3  0x00007f209d0672e1 in postEventSourcePrepare (timeout=0x0, s=0x7f206c0012d0) at kernel/qeventdispatcher_glib.cpp:247
#4  postEventSourceCheck (source=0x7f206c0012d0) at kernel/qeventdispatcher_glib.cpp:264
#5  0x00007f20994cfd51 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f20994d02c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f20994d042c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f209d067a9b in QEventDispatcherGlib::processEvents (this=0x7f206c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#9  0x00007f209d00edea in QEventLoop::exec (this=this@entry=0x7f2079478ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007f209ce2b8a4 in QThread::exec (this=this@entry=0x29aebe0) at thread/qthread.cpp:503
#11 0x00007f209f6d33c5 in QQmlThreadPrivate::run (this=0x29aebe0) at qml/ftw/qqmlthread.cpp:141
#12 0x00007f209ce3084e in QThreadPrivate::start (arg=0x29aebe0) at thread/qthread_unix.cpp:331
#13 0x00007f209bf1d6fa in start_thread (arg=0x7f2079479700) at pthread_create.c:333
#14 0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f20739d0700 (LWP 2648)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f20a1a78bd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f20a1a78c19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f209bf1d6fa in start_thread (arg=0x7f20739d0700) at pthread_create.c:333
#4  0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f2071136700 (LWP 2649)):
#0  0x00007f209c7369cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20995136c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20994cfe04 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20994d02c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f20994d042c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f209d067a9b in QEventDispatcherGlib::processEvents (this=0x7f1fe80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007f209d00edea in QEventLoop::exec (this=this@entry=0x7f2071135c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f209ce2b8a4 in QThread::exec (this=this@entry=0x2bf5750) at thread/qthread.cpp:503
#8  0x00007f20a0059ed6 in QQuickPixmapReader::run (this=0x2bf5750) at util/qquickpixmapcache.cpp:817
#9  0x00007f209ce3084e in QThreadPrivate::start (arg=0x2bf5750) at thread/qthread_unix.cpp:331
#10 0x00007f209bf1d6fa in start_thread (arg=0x7f2071136700) at pthread_create.c:333
#11 0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f1fdf88c700 (LWP 2658)):
#0  0x00007f209c7369cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f20995136c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20994cfe04 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20994d02c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f20994d042c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f209d067a9b in QEventDispatcherGlib::processEvents (this=0x7f1fd80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007f209d00edea in QEventLoop::exec (this=this@entry=0x7f1fdf88bcc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f209ce2b8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007f1fe1d6c7d7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007f209ce3084e in QThreadPrivate::start (arg=0x4cf1390) at thread/qthread_unix.cpp:331
#10 0x00007f209bf1d6fa in start_thread (arg=0x7f1fdf88c700) at pthread_create.c:333
#11 0x00007f209c746b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f20a20348c0 (LWP 2640)):
[KCrash Handler]
#6  0x00007f209f4a30f8 in VDMModelDelegateDataType::notify (this=<optimized out>, items=..., index=3, count=1, roles=...) at util/qqmladaptormodel.cpp:167
#7  0x00007f209f714ada in QQmlAdaptorModel::notify (roles=..., count=1, index=3, items=..., this=0x479f438) at ../../include/QtQml/5.5.1/QtQml/private/../../../../../src/qml/util/qqmladaptormodel_p.h:118
#8  QQmlDelegateModel::_q_itemsChanged (this=<optimized out>, index=3, count=1, roles=...) at types/qqmldelegatemodel.cpp:1144
#9  0x00007f209f714c3a in QQmlDelegateModel::_q_dataChanged (this=<optimized out>, begin=..., end=..., roles=...) at types/qqmldelegatemodel.cpp:1546
#10 0x00007f209f73c17c in QQmlDelegateModel::qt_static_metacall (_o=_o@entry=0x479f380, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=12, _a=_a@entry=0x7fff6f8bca50) at .moc/moc_qqmldelegatemodel_p.cpp:203
#11 0x00007f209f73c968 in QQmlDelegateModel::qt_metacall (this=0x479f380, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0x7fff6f8bca50) at .moc/moc_qqmldelegatemodel_p.cpp:344
#12 0x00007f209d040180 in QMetaObject::activate (sender=0x4777ad0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff6f8bca50) at kernel/qobject.cpp:3728
#13 0x00007f209d0407d7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f209d259ec0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff6f8bca50) at kernel/qobject.cpp:3578
#14 0x00007f209d0bc0fc in QAbstractItemModel::dataChanged (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:548
#15 0x00007f1fe4f3d7f4 in TaskManager::TasksModelPrivate::itemChanged (this=0x4778230, changes=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/libtaskmanager/tasksmodel.cpp:521
#16 0x00007f1fe4f3ea77 in TaskManager::TasksModel::qt_static_metacall (_o=_o@entry=0x4777ad0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=9, _a=_a@entry=0x7fff6f8bcc40) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/obj-x86_64-linux-gnu/libtaskmanager/moc_tasksmodel.cpp:214
#17 0x00007f209d03ffca in QMetaObject::activate (sender=0x5a0ba60, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff6f8bcc40) at kernel/qobject.cpp:3713
#18 0x00007f209d0407d7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f1fe5164900 <TaskManager::AbstractGroupableItem::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff6f8bcc40) at kernel/qobject.cpp:3578
#19 0x00007f1fe4f46a68 in TaskManager::AbstractGroupableItem::changed (this=<optimized out>, _t1=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/obj-x86_64-linux-gnu/libtaskmanager/moc_abstractgroupableitem.cpp:223
#20 0x00007f1fe4f334b0 in TaskManager::TaskItemPrivate::filterChange (change=..., this=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/libtaskmanager/taskitem.cpp:73
#21 TaskManager::TaskItem::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/obj-x86_64-linux-gnu/libtaskmanager/moc_taskitem.cpp:147
#22 0x00007f209d03ffca in QMetaObject::activate (sender=sender@entry=0x4f0aaf0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff6f8bcd90) at kernel/qobject.cpp:3713
#23 0x00007f209d0407d7 in QMetaObject::activate (sender=sender@entry=0x4f0aaf0, m=m@entry=0x7f1fe5164600 <TaskManager::Task::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff6f8bcd90) at kernel/qobject.cpp:3578
#24 0x00007f1fe4f46c58 in TaskManager::Task::changed (this=this@entry=0x4f0aaf0, _t1=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/obj-x86_64-linux-gnu/libtaskmanager/moc_task.cpp:359
#25 0x00007f1fe4f24d5b in TaskManager::Task::setActive (this=this@entry=0x4f0aaf0, a=a@entry=true) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/libtaskmanager/task.cpp:178
#26 0x00007f1fe4f393e9 in TaskManager::TaskManager::activeWindowChanged (this=0x7f1fe5165f90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, w=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/libtaskmanager/taskmanager.cpp:412
#27 0x00007f209d03fe4f in QtPrivate::QSlotObjectBase::call (a=0x7fff6f8bcf20, r=0x7f1fe5165f90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#28 QMetaObject::activate (sender=sender@entry=0x7f209f3f9c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff6f8bcf20) at kernel/qobject.cpp:3698
#29 0x00007f209d0407d7 in QMetaObject::activate (sender=sender@entry=0x7f209f3f9c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, m=m@entry=0x7f209f3f8ba0 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff6f8bcf20) at kernel/qobject.cpp:3578
#30 0x00007f209f1ea682 in KWindowSystem::activeWindowChanged (this=this@entry=0x7f209f3f9c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, _t1=92275107) at moc_kwindowsystem.cpp:303
#31 0x00007f2086b1225b in NETEventFilter::nativeEventFilter (this=0x46718f0, ev=0x7f208800b090) at ../../../../src/platforms/xcb/kwindowsystem.cpp:208
#32 0x00007f209d00df9f in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7f208800b090, result=result@entry=0x7fff6f8bd058) at kernel/qabstracteventdispatcher.cpp:460
#33 0x00007f208f3430a4 in QXcbConnection::handleXcbEvent (this=this@entry=0x2434a20, event=event@entry=0x7f208800b090) at qxcbconnection.cpp:1044
#34 0x00007f208f343e53 in QXcbConnection::processXcbEvents (this=0x2434a20) at qxcbconnection.cpp:1532
#35 0x00007f209d040ea1 in QObject::event (this=0x2434a20, e=<optimized out>) at kernel/qobject.cpp:1239
#36 0x00007f209db1405c in QApplicationPrivate::notify_helper (this=this@entry=0x2429890, receiver=receiver@entry=0x2434a20, e=e@entry=0x7f208800a3e0) at kernel/qapplication.cpp:3716
#37 0x00007f209db19516 in QApplication::notify (this=0x7fff6f8bd7e0, receiver=0x2434a20, e=0x7f208800a3e0) at kernel/qapplication.cpp:3499
#38 0x00007f209d01162b in QCoreApplication::notifyInternal (this=0x7fff6f8bd7e0, receiver=0x2434a20, event=event@entry=0x7f208800a3e0) at kernel/qcoreapplication.cpp:965
#39 0x00007f209d013a26 in QCoreApplication::sendEvent (event=0x7f208800a3e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#40 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x241f600) at kernel/qcoreapplication.cpp:1593
#41 0x00007f209d013f08 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#42 0x00007f209d067673 in postEventSourceDispatch (s=0x2466320) at kernel/qeventdispatcher_glib.cpp:271
#43 0x00007f20994d0127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007f20994d0380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f20994d042c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f209d067a7f in QEventDispatcherGlib::processEvents (this=0x2471810, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#47 0x00007f209d00edea in QEventLoop::exec (this=this@entry=0x7fff6f8bd680, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#48 0x00007f209d016e8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#49 0x00007f209d34ac3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#50 0x00007f209db10495 in QApplication::exec () at kernel/qapplication.cpp:2976
#51 0x0000000000432d4a in main (argc=4, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

Possible duplicates by query: bug 362557, bug 362469, bug 362159, bug 362054, bug 361749.

Reported using DrKonqi