Application: plasmashell (5.4.2)
 (Compiled from sources)
Qt Version: 5.5.1
Operating System: Linux 4.2.0-1-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
- What I was doing when the application crashed:

closing an app window
closing an app window

this is a duplicate of #354794

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 0x7efc2baab940 (LWP 13398))]

Thread 8 (Thread 0x7efc16b04700 (LWP 13401)):
#0  0x00007efc261e352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007efc2a2a0382 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007efc2a2a1ff7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007efc17dfa569 in QXcbEventReader::run (this=0x873a30) at qxcbconnection.cpp:1229
#4  0x00007efc268cf87e in QThreadPrivate::start (arg=0x873a30) at thread/qthread_unix.cpp:331
#5  0x00007efc259ec0a4 in start_thread (arg=0x7efc16b04700) at pthread_create.c:309
#6  0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7efc0ffff700 (LWP 13555)):
#0  0x00007efc22f90700 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efc22f9110b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc22f912ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc26b0739b in QEventDispatcherGlib::processEvents (this=0x7efc080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007efc26aae35a in QEventLoop::exec (this=this@entry=0x7efc0fffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007efc268ca8d4 in QThread::exec (this=this@entry=0x966500) at thread/qthread.cpp:503
#6  0x00007efc29160105 in QQmlThreadPrivate::run (this=0x966500) at qml/ftw/qqmlthread.cpp:141
#7  0x00007efc268cf87e in QThreadPrivate::start (arg=0x966500) at thread/qthread_unix.cpp:331
#8  0x00007efc259ec0a4 in start_thread (arg=0x7efc0ffff700) at pthread_create.c:309
#9  0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7efc05c64700 (LWP 13599)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc0d9277fa in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007efc0d926f37 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007efc259ec0a4 in start_thread (arg=0x7efc05c64700) at pthread_create.c:309
#4  0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7efc0361e700 (LWP 13617)):
#0  0x00007efc261e352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007efc22f911dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc22f912ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc26b0739b in QEventDispatcherGlib::processEvents (this=0x7efbfc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007efc26aae35a in QEventLoop::exec (this=this@entry=0x7efc0361dc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007efc268ca8d4 in QThread::exec (this=this@entry=0xbdf800) at thread/qthread.cpp:503
#6  0x00007efc29160105 in QQmlThreadPrivate::run (this=0xbdf800) at qml/ftw/qqmlthread.cpp:141
#7  0x00007efc268cf87e in QThreadPrivate::start (arg=0xbdf800) at thread/qthread_unix.cpp:331
#8  0x00007efc259ec0a4 in start_thread (arg=0x7efc0361e700) at pthread_create.c:309
#9  0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7efc01652700 (LWP 13637)):
#0  0x00007efc22fd5859 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efc22f90779 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc22f9110b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc22f912ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efc26b0739b in QEventDispatcherGlib::processEvents (this=0x7efbf40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007efc26aae35a in QEventLoop::exec (this=this@entry=0x7efc01651c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007efc268ca8d4 in QThread::exec (this=this@entry=0xc8e380) at thread/qthread.cpp:503
#7  0x00007efc29160105 in QQmlThreadPrivate::run (this=0xc8e380) at qml/ftw/qqmlthread.cpp:141
#8  0x00007efc268cf87e in QThreadPrivate::start (arg=0xc8e380) at thread/qthread_unix.cpp:331
#9  0x00007efc259ec0a4 in start_thread (arg=0x7efc01652700) at pthread_create.c:309
#10 0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7efbfbbd9700 (LWP 13650)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc2b50f1c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007efc2b50f209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007efc259ec0a4 in start_thread (arg=0x7efbfbbd9700) at pthread_create.c:309
#4  0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7efbf92e7700 (LWP 13652)):
#0  0x00007efc261e352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007efc22f911dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc22f912ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc26b0739b in QEventDispatcherGlib::processEvents (this=0x7efb700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007efc26aae35a in QEventLoop::exec (this=this@entry=0x7efbf92e6c10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007efc268ca8d4 in QThread::exec (this=this@entry=0xd17c50) at thread/qthread.cpp:503
#6  0x00007efc29ae8136 in QQuickPixmapReader::run (this=0xd17c50) at util/qquickpixmapcache.cpp:760
#7  0x00007efc268cf87e in QThreadPrivate::start (arg=0xd17c50) at thread/qthread_unix.cpp:331
#8  0x00007efc259ec0a4 in start_thread (arg=0x7efbf92e7700) at pthread_create.c:309
#9  0x00007efc261ec06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7efc2baab940 (LWP 13398)):
[KCrash Handler]
#6  QMetaObject::methodOffset (this=this@entry=0x0) at kernel/qmetaobject.cpp:382
#7  0x00007efc26adff6b in QMetaObject::activate (sender=sender@entry=0x294c8c0, signal_index=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3760
#8  0x00007efc28f32392 in VDMModelDelegateDataType::notify (this=<optimized out>, items=..., index=0, count=1, roles=...) at util/qqmladaptormodel.cpp:171
#9  0x00007efc291a197a in QQmlAdaptorModel::notify (roles=..., count=1, index=<optimized out>, items=..., this=0x1d561a8) at ../../include/QtQml/5.5.1/QtQml/private/../../../../../src/qml/util/qqmladaptormodel_p.h:118
#10 QQmlDelegateModel::_q_itemsChanged (this=<optimized out>, index=0, count=1, roles=...) at types/qqmldelegatemodel.cpp:1144
#11 0x00007efc291a1ada in QQmlDelegateModel::_q_dataChanged (this=<optimized out>, begin=..., end=..., roles=...) at types/qqmldelegatemodel.cpp:1546
#12 0x00007efc291c904c in QQmlDelegateModel::qt_static_metacall (_o=_o@entry=0x1d560f0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=12, _a=_a@entry=0x7ffeb392af20) at .moc/moc_qqmldelegatemodel_p.cpp:203
#13 0x00007efc291c9838 in QQmlDelegateModel::qt_metacall (this=0x1d560f0, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0x7ffeb392af20) at .moc/moc_qqmldelegatemodel_p.cpp:344
#14 0x00007efc26adf8f0 in QMetaObject::activate (sender=0x1d50940, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeb392af20) at kernel/qobject.cpp:3728
#15 0x00007efc26adff37 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7efc26cf9ec0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeb392af20) at kernel/qobject.cpp:3578
#16 0x00007efc26b5bc8c in QAbstractItemModel::dataChanged (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:548
#17 0x00007efb6cfed054 in TaskManager::TasksModelPrivate::itemChanged (this=0x1d48260, changes=...) at ../../libtaskmanager/tasksmodel.cpp:521
#18 0x00007efb6cfee2f7 in TaskManager::TasksModel::qt_static_metacall (_o=_o@entry=0x1d50940, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=9, _a=_a@entry=0x7ffeb392b110) at ./moc_tasksmodel.cpp:214
#19 0x00007efc26adf73a in QMetaObject::activate (sender=0x2aac9f0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeb392b110) at kernel/qobject.cpp:3713
#20 0x00007efc26adff37 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7efb6d212960 <TaskManager::AbstractGroupableItem::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeb392b110) at kernel/qobject.cpp:3578
#21 0x00007efb6cff6228 in TaskManager::AbstractGroupableItem::changed (this=<optimized out>, _t1=...) at moc_abstractgroupableitem.cpp:223
#22 0x00007efb6cfe36a0 in TaskManager::TaskItemPrivate::filterChange (change=..., this=<optimized out>) at ../../libtaskmanager/taskitem.cpp:73
#23 TaskManager::TaskItem::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskitem.cpp:147
#24 0x00007efc26adf73a in QMetaObject::activate (sender=sender@entry=0xb931a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeb392b260) at kernel/qobject.cpp:3713
#25 0x00007efc26adff37 in QMetaObject::activate (sender=sender@entry=0xb931a0, m=m@entry=0x7efb6d212660 <TaskManager::Task::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeb392b260) at kernel/qobject.cpp:3578
#26 0x00007efb6cff6418 in TaskManager::Task::changed (this=this@entry=0xb931a0, _t1=...) at moc_task.cpp:359
#27 0x00007efb6cfd56fb in TaskManager::Task::setActive (this=this@entry=0xb931a0, a=a@entry=true) at ../../libtaskmanager/task.cpp:178
#28 0x00007efb6cfe94ac in TaskManager::TaskManager::activeWindowChanged (this=0x7efb6d214850 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, w=<optimized out>) at ../../libtaskmanager/taskmanager.cpp:412
#29 0x00007efb6cfeb7f7 in TaskManager::TaskManager::qt_static_metacall (_o=_o@entry=0x7efb6d214850 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=10, _a=_a@entry=0x7ffeb392b450) at ./moc_taskmanager.cpp:176
#30 0x00007efc26adf73a in QMetaObject::activate (sender=sender@entry=0x7efc28e8a120 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffeb392b450) at kernel/qobject.cpp:3713
#31 0x00007efc26adff37 in QMetaObject::activate (sender=sender@entry=0x7efc28e8a120 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, m=m@entry=0x7efc28e88b80 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffeb392b450) at kernel/qobject.cpp:3578
#32 0x00007efc28c7ac62 in KWindowSystem::activeWindowChanged (this=this@entry=0x7efc28e8a120 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, _t1=25166253) at moc_kwindowsystem.cpp:303
#33 0x00007efc1450629b in NETEventFilter::nativeEventFilter (this=0x1d38a80, ev=0x7efc100095d0) at ../../../../src/platforms/xcb/kwindowsystem.cpp:208
#34 0x00007efc26aad4ef in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7efc100095d0, result=result@entry=0x7ffeb392b588) at kernel/qabstracteventdispatcher.cpp:460
#35 0x00007efc17dfdfd4 in QXcbConnection::handleXcbEvent (this=this@entry=0x871bc0, event=event@entry=0x7efc100095d0) at qxcbconnection.cpp:1020
#36 0x00007efc17dfed83 in QXcbConnection::processXcbEvents (this=0x871bc0) at qxcbconnection.cpp:1502
#37 0x00007efc26ae0601 in QObject::event (this=0x871bc0, e=<optimized out>) at kernel/qobject.cpp:1239
#38 0x00007efc275b4ffc in QApplicationPrivate::notify_helper (this=this@entry=0x869180, receiver=receiver@entry=0x871bc0, e=e@entry=0x7efc1000c290) at kernel/qapplication.cpp:3716
#39 0x00007efc275ba4c6 in QApplication::notify (this=0x7ffeb392bd30, receiver=0x871bc0, e=0x7efc1000c290) at kernel/qapplication.cpp:3499
#40 0x00007efc26ab0bcb in QCoreApplication::notifyInternal (this=0x7ffeb392bd30, receiver=0x871bc0, event=event@entry=0x7efc1000c290) at kernel/qcoreapplication.cpp:965
#41 0x00007efc26ab2fc6 in QCoreApplication::sendEvent (event=0x7efc1000c290, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#42 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x85f5f0) at kernel/qcoreapplication.cpp:1593
#43 0x00007efc26ab34a8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#44 0x00007efc26b06f73 in postEventSourceDispatch (s=0x8c0320) at kernel/qeventdispatcher_glib.cpp:271
#45 0x00007efc22f90fe7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007efc22f91240 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007efc22f912ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007efc26b0737f in QEventDispatcherGlib::processEvents (this=0x8c03a0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#49 0x00007efc26aae35a in QEventLoop::exec (this=this@entry=0x7ffeb392bbb0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#50 0x00007efc26ab643c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#51 0x00007efc26dea8ec in QGuiApplication::exec () at kernel/qguiapplication.cpp:1527
#52 0x00007efc275b1435 in QApplication::exec () at kernel/qapplication.cpp:2976
#53 0x0000000000431273 in main (argc=2, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 355650, bug 354794, bug 354214, bug 352946, bug 342763.

Reported using DrKonqi