Bug 390171

Application: plasmashell (5.12.0)

Qt Version: 5.9.3
Frameworks Version: 5.42.0
Operating System: Linux 4.15.1-041501-generic x86_64
Distribution: KDE neon User Edition 5.12

-- Information about the crash:
- What I was doing when the application crashed:
on startup plasmashell crashs. it is possible to start it with alt+f2 afterwards.
everything is default, except global menu and a second, auto hidden task bar.

The crash can be reproduced every time.

-- 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 0x7f62d07ff8c0 (LWP 1405))]

Thread 5 (Thread 0x7f62abbdf700 (LWP 1640)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f62cff74d04 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f62cff74d49 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f62c94686ba in start_thread (arg=0x7f62abbdf700) at pthread_create.c:333
#4  0x00007f62c9ed041d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f62b25ba700 (LWP 1578)):
#0  0x00007f62c9ec027d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62c4dca6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62c4d86e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f62c4d87330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f62c4d8749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f62ca7eb6cb in QEventDispatcherGlib::processEvents (this=0x7f62a40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f62ca793e2a in QEventLoop::exec (this=this@entry=0x7f62b25b9ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f62ca5bc8f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#8  0x00007f62cd714d25 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f62ca5c1709 in QThreadPrivate::start (arg=0x23b2140) at thread/qthread_unix.cpp:368
#10 0x00007f62c94686ba in start_thread (arg=0x7f62b25ba700) at pthread_create.c:333
#11 0x00007f62c9ed041d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f62b3fff700 (LWP 1542)):
#0  0x00007f62c9ec474d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62c4d8738c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62c4d8749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f62ca7eb6cb in QEventDispatcherGlib::processEvents (this=0x7f62ac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f62ca793e2a in QEventLoop::exec (this=this@entry=0x7f62b3ffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f62ca5bc8f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f62cd714d25 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f62ca5c1709 in QThreadPrivate::start (arg=0x2266210) at thread/qthread_unix.cpp:368
#8  0x00007f62c94686ba in start_thread (arg=0x7f62b3fff700) at pthread_create.c:333
#9  0x00007f62c9ed041d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f62b9b7c700 (LWP 1483)):
#0  0x00007f62c9ec474d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62c4d8738c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62c4d8749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f62ca7eb6cb in QEventDispatcherGlib::processEvents (this=0x7f62b40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f62ca793e2a in QEventLoop::exec (this=this@entry=0x7f62b9b7bcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f62ca5bc8f4 in QThread::exec (this=this@entry=0x7f62caeded40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:515
#6  0x00007f62cac6a315 in QDBusConnectionManager::run (this=0x7f62caeded40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#7  0x00007f62ca5c1709 in QThreadPrivate::start (arg=0x7f62caeded40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#8  0x00007f62c94686ba in start_thread (arg=0x7f62b9b7c700) at pthread_create.c:333
#9  0x00007f62c9ed041d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f62d07ff8c0 (LWP 1405)):
[KCrash Handler]
#6  0x00007f62cb03b816 in QScreen::name (this=this@entry=0x2193140) at kernel/qscreen.cpp:160
#7  0x0000000000446ce8 in ShellCorona::load (this=this@entry=0x224ebb0) at /workspace/build/shell/shellcorona.cpp:696
#8  0x00000000004473ea in ShellCorona::load (this=0x224ebb0) at /workspace/build/shell/shellcorona.cpp:642
#9  0x00007f62ca7c25a6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe12a22a30, r=0x224ebb0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#10 QMetaObject::activate (sender=0x2215be0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe12a22a30) at kernel/qobject.cpp:3749
#11 0x00007f62ca7c2b87 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f62cfb17b60 <KActivities::Consumer::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe12a22a30) at kernel/qobject.cpp:3628
#12 0x00007f62cf9087b1 in KActivities::Consumer::serviceStatusChanged (this=<optimized out>, _t1=KActivities::Consumer::Running) at /workspace/build/obj-x86_64-linux-gnu/src/lib/moc_consumer.cpp:248
#13 0x00007f62cf909e6b in KActivities::Consumer::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/lib/moc_consumer.cpp:114
#14 0x00007f62ca7c2279 in QMetaObject::activate (sender=sender@entry=0x224d230, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=8, argv=argv@entry=0x7ffe12a22bc0) at kernel/qobject.cpp:3766
#15 0x00007f62ca7c2b87 in QMetaObject::activate (sender=sender@entry=0x224d230, m=m@entry=0x7f62cfb17c20 <KActivities::ActivitiesCache::staticMetaObject>, local_signal_index=local_signal_index@entry=8, argv=argv@entry=0x7ffe12a22bc0) at kernel/qobject.cpp:3628
#16 0x00007f62cf908671 in KActivities::ActivitiesCache::serviceStatusChanged (this=this@entry=0x224d230, _t1=_t1@entry=KActivities::Consumer::Running) at /workspace/build/obj-x86_64-linux-gnu/src/lib/moc_activitiescache_p.cpp:407
#17 0x00007f62cf901a23 in KActivities::ActivitiesCache::setAllActivities (this=this@entry=0x224d230, _activities=...) at /workspace/build/src/lib/activitiescache_p.cpp:300
#18 0x00007f62cf901c98 in KActivities::ActivitiesCache::passInfoFromReply<QList<ActivityInfo>, void (KActivities::ActivitiesCache::*)(QList<ActivityInfo> const&)> (f=(void (KActivities::ActivitiesCache::*)(KActivities::ActivitiesCache * const, const QList<ActivityInfo> &)) 0x7f62cf901850 <KActivities::ActivitiesCache::setAllActivities(QList<ActivityInfo> const&)>, watcher=0x224f240, this=<optimized out>) at /workspace/build/src/lib/activitiescache_p.cpp:211
#19 KActivities::ActivitiesCache::setAllActivitiesFromReply (this=<optimized out>, watcher=0x224f240) at /workspace/build/src/lib/activitiescache_p.cpp:226
#20 0x00007f62cf9090b4 in KActivities::ActivitiesCache::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/lib/moc_activitiescache_p.cpp:200
#21 0x00007f62ca7c2279 in QMetaObject::activate (sender=0x224f240, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe12a22ee0) at kernel/qobject.cpp:3766
#22 0x00007f62ca7c2b87 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f62caedd5e0 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe12a22ee0) at kernel/qobject.cpp:3628
#23 0x00007f62cacc1e8f in QDBusPendingCallWatcher::finished (this=<optimized out>, _t1=0x224f240) at .moc/moc_qdbuspendingcall.cpp:153
#24 0x00007f62cacc1f88 in QDBusPendingCallWatcherPrivate::_q_finished (this=<optimized out>) at qdbuspendingcall.cpp:494
#25 QDBusPendingCallWatcher::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qdbuspendingcall.cpp:85
#26 0x00007f62ca7c32b9 in QObject::event (this=0x224f240, e=<optimized out>) at kernel/qobject.cpp:1246
#27 0x00007f62cb77fb9c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x224f240, e=0x7f62b400bd20) at kernel/qapplication.cpp:3722
#28 0x00007f62cb7875a7 in QApplication::notify (this=0x7ffe12a235c0, receiver=0x224f240, e=0x7f62b400bd20) at kernel/qapplication.cpp:3481
#29 0x00007f62ca795df8 in QCoreApplication::notifyInternal2 (receiver=0x224f240, event=event@entry=0x7f62b400bd20) at kernel/qcoreapplication.cpp:1018
#30 0x00007f62ca7985db in QCoreApplication::sendEvent (event=0x7f62b400bd20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#31 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2170b90) at kernel/qcoreapplication.cpp:1678
#32 0x00007f62ca798a48 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#33 0x00007f62ca7ec0a3 in postEventSourceDispatch (s=0x21a85a0) at kernel/qeventdispatcher_glib.cpp:276
#34 0x00007f62c4d87197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f62c4d873f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f62c4d8749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f62ca7eb6af in QEventDispatcherGlib::processEvents (this=0x21fdd10, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#38 0x00007f62ca793e2a in QEventLoop::exec (this=this@entry=0x7ffe12a23480, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#39 0x00007f62ca79cd64 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#40 0x00007f62cb008bdc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1679
#41 0x00007f62cb77faf5 in QApplication::exec () at kernel/qapplication.cpp:2910
#42 0x000000000041cd99 in main (argc=1, argv=<optimized out>) at /workspace/build/shell/main.cpp:166

Possible duplicates by query: bug 385342, bug 379085.

Reported using DrKonqi