Application: plasmashell (5.10.1)

Qt Version: 5.7.1
Frameworks Version: 5.34.0
Operating System: Linux 4.8.0-54-generic x86_64
Distribution: KDE neon User Edition 5.10

-- Information about the crash:
- What I was doing when the application crashed: Trying to change theme. Sometimes plasma boots up to a black screen..

-- 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 0x7f9c1dfae8c0 (LWP 1554))]

Thread 8 (Thread 0x7f9b559fd700 (LWP 1678)):
#0  0x00007f9c188e8b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f9c1407e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9c1407e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9c1920875b in QEventDispatcherGlib::processEvents (this=0x7f9b500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f9c191b30ba in QEventLoop::exec (this=this@entry=0x7f9b559fccc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f9c18fe2f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f9b57edb587 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f9c18fe7b48 in QThreadPrivate::start (arg=0x3fd0420) at thread/qthread_unix.cpp:368
#8  0x00007f9c17e8d6ba in start_thread (arg=0x7f9b559fd700) at pthread_create.c:333
#9  0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f9b6988e700 (LWP 1661)):
#0  0x00007f9c1407b3f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9c1407d8bb in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9c1407e2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9c1407e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9c1920875b in QEventDispatcherGlib::processEvents (this=0x7f9b640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f9c191b30ba in QEventLoop::exec (this=this@entry=0x7f9b6988dc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f9c18fe2f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f9c1bf9afc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f9c18fe7b48 in QThreadPrivate::start (arg=0x1c93950) at thread/qthread_unix.cpp:368
#9  0x00007f9c17e8d6ba in start_thread (arg=0x7f9b6988e700) at pthread_create.c:333
#10 0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f9bfa5a7700 (LWP 1660)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9c1d9ff6f4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f9c1d9ff739 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f9c17e8d6ba in start_thread (arg=0x7f9bfa5a7700) at pthread_create.c:333
#4  0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f9bfbfff700 (LWP 1659)):
#0  0x00007ffecedf8a4a in clock_gettime ()
#1  0x00007f9c18902c86 in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7f9bfbffea40) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f9c1908d241 in qt_clock_gettime (ts=0x7f9bfbffea40, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:109
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:164
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:173
#5  0x00007f9c192063d9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f9bf0002ed0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f9c19206945 in QTimerInfoList::timerWait (this=0x7f9bf0002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f9c19207d0e in timerSourcePrepareHelper (timeout=0x7f9bfbffeb14, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f9bfbffeb14) at kernel/qeventdispatcher_glib.cpp:165
#9  0x00007f9c1407d91d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f9c1407e2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f9c1407e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f9c1920875b in QEventDispatcherGlib::processEvents (this=0x7f9bf00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f9c191b30ba in QEventLoop::exec (this=this@entry=0x7f9bfbffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#14 0x00007f9c18fe2f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#15 0x00007f9c1b613bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f9c18fe7b48 in QThreadPrivate::start (arg=0x15006a0) at thread/qthread_unix.cpp:368
#17 0x00007f9c17e8d6ba in start_thread (arg=0x7f9bfbfff700) at pthread_create.c:333
#18 0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f9c02123700 (LWP 1658)):
#0  0x00007f9c18fdf329 in std::__atomic_base<QMutexData*>::compare_exchange_strong (__m2=<optimized out>, __m1=std::memory_order_release, __p2=0x0, __p1=@0x7f9c02122a88: 0x1, this=0x15ce8d0) at /usr/include/c++/5/bits/atomic_base.h:752
#1  std::atomic<QMutexData*>::compare_exchange_strong (__m=std::memory_order_release, __p2=0x0, __p1=@0x7f9c02122a88: 0x1, this=0x15ce8d0) at /usr/include/c++/5/atomic:475
#2  QAtomicOps<QMutexData*>::testAndSetRelease<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_cxx11.h:299
#3  QBasicAtomicPointer<QMutexData>::testAndSetRelease (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=<optimized out>, this=0x15ce8d0) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:261
#4  QBasicMutex::fastTryUnlock (current=<synthetic pointer>, this=0x15ce8d0) at thread/qmutex.h:92
#5  QMutex::unlock (this=this@entry=0x15ce8d0) at thread/qmutex.cpp:277
#6  0x00007f9c19207ec1 in QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:147
#7  QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:141
#8  QThreadData::canWaitLocked (this=0x15ce8a0) at ../../include/QtCore/5.7.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:253
#9  postEventSourcePrepare (s=0x7f9bf40012d0, timeout=0x7f9c02122b14) at kernel/qeventdispatcher_glib.cpp:259
#10 0x00007f9c1407d91d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f9c1407e2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f9c1407e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f9c1920875b in QEventDispatcherGlib::processEvents (this=0x7f9bf40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#14 0x00007f9c191b30ba in QEventLoop::exec (this=this@entry=0x7f9c02122ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#15 0x00007f9c18fe2f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#16 0x00007f9c1b613bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f9c18fe7b48 in QThreadPrivate::start (arg=0x15cf190) at thread/qthread_unix.cpp:368
#18 0x00007f9c17e8d6ba in start_thread (arg=0x7f9c02123700) at pthread_create.c:333
#19 0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f9c03b68700 (LWP 1624)):
#0  0x00007f9c140c2a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9c1407d464 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9c1407e346 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9c1407e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9c1920875b in QEventDispatcherGlib::processEvents (this=0x7f9bfc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f9c191b30ba in QEventLoop::exec (this=this@entry=0x7f9c03b67cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f9c18fe2f64 in QThread::exec (this=this@entry=0x7f9c1e15fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#7  0x00007f9c1e0eb735 in QDBusConnectionManager::run (this=0x7f9c1e15fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f9c18fe7b48 in QThreadPrivate::start (arg=0x7f9c1e15fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#9  0x00007f9c17e8d6ba in start_thread (arg=0x7f9c03b68700) at pthread_create.c:333
#10 0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f9c09466700 (LWP 1579)):
#0  0x00007f9c188e8b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f9c1c960c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f9c1c9628d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f9c0b5acd79 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f9c18fe7b48 in QThreadPrivate::start (arg=0x151a170) at thread/qthread_unix.cpp:368
#5  0x00007f9c17e8d6ba in start_thread (arg=0x7f9c09466700) at pthread_create.c:333
#6  0x00007f9c188f482d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f9c1dfae8c0 (LWP 1554)):
[KCrash Handler]
#6  0x00007f9b59374514 in NotificationsApplet::onScreenChanges (this=0x3c6e9f0) at /workspace/build/applets/notifications/lib/notificationsapplet.cpp:70
#7  0x00007f9c191e01f6 in QtPrivate::QSlotObjectBase::call (a=0x7ffeceda72f0, r=0x3c6e9f0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#8  QMetaObject::activate (sender=sender@entry=0x15917a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x0) at kernel/qobject.cpp:3723
#9  0x00007f9c191e0837 in QMetaObject::activate (sender=sender@entry=0x15917a0, m=m@entry=0x7f9c1c745140 <Plasma::Corona::staticMetaObject>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x0) at kernel/qobject.cpp:3602
#10 0x00007f9c1c4cf4c3 in Plasma::Corona::availableScreenRectChanged (this=this@entry=0x15917a0) at /workspace/build/obj-x86_64-linux-gnu/src/plasma/moc_corona.cpp:422
#11 0x000000000043bfe4 in ShellCorona::panelContainmentDestroyed (this=0x15917a0, cont=<optimized out>) at /workspace/build/shell/shellcorona.cpp:1321
#12 0x00007f9c191e01f6 in QtPrivate::QSlotObjectBase::call (a=0x7ffeceda74a0, r=0x15917a0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#13 QMetaObject::activate (sender=sender@entry=0x16b5580, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeceda74a0) at kernel/qobject.cpp:3723
#14 0x00007f9c191e0837 in QMetaObject::activate (sender=sender@entry=0x16b5580, m=m@entry=0x7f9c193f1820 <QObject::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeceda74a0) at kernel/qobject.cpp:3602
#15 0x00007f9c191e08df in QObject::destroyed (this=this@entry=0x16b5580, _t1=_t1@entry=0x16b5580) at .moc/moc_qobject.cpp:213
#16 0x00007f9c191e7475 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:920
#17 0x00007f9c1c4c8859 in Plasma::Containment::~Containment (this=0x16b5580, __in_chrg=<optimized out>) at /workspace/build/src/plasma/containment.cpp:95
#18 0x000000000043e74b in ShellCorona::unload (this=this@entry=0x15917a0) at /workspace/build/shell/shellcorona.cpp:878
#19 0x00000000004487c8 in ShellCorona::unload (this=0x15917a0) at /workspace/build/shell/shellcorona.cpp:619
#20 ShellCorona::loadLookAndFeelDefaultLayout (this=0x15917a0, packageName=...) at /workspace/build/shell/shellcorona.cpp:631
#21 0x00000000004741a1 in PlasmaShellAdaptor::loadLookAndFeelDefaultLayout (layout=..., this=0x156e8d0) at /workspace/build/obj-x86_64-linux-gnu/shell/plasmashelladaptor.cpp:63
#22 PlasmaShellAdaptor::qt_static_metacall (_o=_o@entry=0x156e8d0, _id=_id@entry=4, _a=_a@entry=0x7ffeceda77f0, _c=QMetaObject::InvokeMetaMethod) at /workspace/build/obj-x86_64-linux-gnu/shell/plasmashelladaptor.moc:144
#23 0x0000000000474423 in PlasmaShellAdaptor::qt_static_metacall (_a=0x7ffeceda77f0, _id=4, _c=QMetaObject::InvokeMetaMethod, _o=0x156e8d0) at /workspace/build/obj-x86_64-linux-gnu/shell/plasmashelladaptor.moc:182
#24 PlasmaShellAdaptor::qt_metacall (this=0x156e8d0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7ffeceda77f0) at /workspace/build/obj-x86_64-linux-gnu/shell/plasmashelladaptor.moc:183
#25 0x00007f9c1e0f7923 in QDBusConnectionPrivate::deliverCall (this=this@entry=0x7f9bfc0030f0, object=object@entry=0x156e8d0, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:995
#26 0x00007f9c1e0fb72a in QDBusConnectionPrivate::activateCall (this=this@entry=0x7f9bfc0030f0, object=0x156e8d0, flags=flags@entry=273, msg=...) at qdbusintegrator.cpp:898
#27 0x00007f9c1e0fc03b in QDBusConnectionPrivate::activateObject (this=0x7f9bfc0030f0, node=..., msg=..., pathStartPos=<optimized out>) at qdbusintegrator.cpp:1488
#28 0x00007f9c1e0fe7fe in QDBusActivateObjectEvent::placeMetaCall (this=0x7f9bfc0435d0) at qdbusintegrator.cpp:1608
#29 0x00007f9c191e0d99 in QObject::event (this=0x15917a0, e=<optimized out>) at kernel/qobject.cpp:1263
#30 0x00007f9c19a93ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x15917a0, e=0x7f9bfc0435d0) at kernel/qapplication.cpp:3799
#31 0x00007f9c19a9b8c6 in QApplication::notify (this=0x7ffeceda80f0, receiver=0x15917a0, e=0x7f9bfc0435d0) at kernel/qapplication.cpp:3556
#32 0x00007f9c191b50c8 in QCoreApplication::notifyInternal2 (receiver=0x15917a0, event=event@entry=0x7f9bfc0435d0) at kernel/qcoreapplication.cpp:988
#33 0x00007f9c191b778b in QCoreApplication::sendEvent (event=0x7f9bfc0435d0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#34 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x14f7b90) at kernel/qcoreapplication.cpp:1649
#35 0x00007f9c191b7bf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#36 0x00007f9c19208333 in postEventSourceDispatch (s=0x1537c80) at kernel/qeventdispatcher_glib.cpp:276
#37 0x00007f9c1407e197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f9c1407e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f9c1407e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f9c1920873f in QEventDispatcherGlib::processEvents (this=0x1543750, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#41 0x00007f9c191b30ba in QEventLoop::exec (this=this@entry=0x7ffeceda7f80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#42 0x00007f9c191bb6cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#43 0x000000000041ce18 in main (argc=1, argv=<optimized out>) at /workspace/build/shell/main.cpp:166

Possible duplicates by query: bug 378508.

Reported using DrKonqi