Bug 437530

Application: plasmashell (5.21.5)

Qt Version: 5.15.2
Frameworks Version: 5.82.0
Operating System: Linux 5.4.0-73-generic x86_64
Windowing System: Wayland
Drkonqi Version: 5.21.5
Distribution: KDE neon User Edition 5.21

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

Right after login I get a notification from KDE Crash Handler that Plasma crashed.
It crashed only once during the session and after that it works fine. After reboot Plasma
crashes again.

Additional information:

I have an external display connected to my laptop. I made it primary and in the same time
I disabled laptop's display.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault

[New LWP 2078]
[New LWP 2123]
[New LWP 2124]
[New LWP 2125]
[New LWP 2126]
[New LWP 2305]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f96dd0a6aff in poll () from /lib/x86_64-linux-gnu/libc.so.6
[Current thread is 1 (Thread 0x7f96d92d88c0 (LWP 2055))]

Thread 7 (Thread 0x7f96c9e4a700 (LWP 2305)):
#0  0x00007f96dd0a217c in read () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f96db95ab2f in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f96db911ebe in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96db912312 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f96db9124a3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f96dd673ffb in QEventDispatcherGlib::processEvents (this=0x7f96ac000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f96dd6181eb in QEventLoop::exec (this=this@entry=0x7f96c9e49cc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f96dd432a52 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f96ded0dfa9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f96dd433bec in QThreadPrivate::start (arg=0x55d916e6c340) at thread/qthread_unix.cpp:329
#10 0x00007f96dc483609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007f96dd0b3293 in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 6 (Thread 0x7f96cb05b700 (LWP 2126)):
#0  0x00007f96dc48a376 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f96d66c8b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#2  0x00007f96d66c875b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#3  0x00007f96dc483609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f96dd0b3293 in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 5 (Thread 0x7f96d4f6d700 (LWP 2125)):
#0  0x00007f96dc48a376 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f96d66c8b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#2  0x00007f96d66c875b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#3  0x00007f96dc483609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f96dd0b3293 in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 4 (Thread 0x7f96d576e700 (LWP 2124)):
#0  0x00007f96dc48a376 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f96d66c8b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#2  0x00007f96d66c875b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#3  0x00007f96dc483609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f96dd0b3293 in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 3 (Thread 0x7f96d5f6f700 (LWP 2123)):
#0  0x00007f96dc48a376 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f96d66c8b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#2  0x00007f96d66c875b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#3  0x00007f96dc483609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f96dd0b3293 in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 2 (Thread 0x7f96d8486700 (LWP 2078)):
#0  0x00007f96dd0a217c in read () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f96db95ab2f in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f96db911ebe in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96db912312 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f96db9124a3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f96dd673ffb in QEventDispatcherGlib::processEvents (this=0x7f96d0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f96dd6181eb in QEventLoop::exec (this=this@entry=0x7f96d8485cb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f96dd432a52 in QThread::exec (this=this@entry=0x7f96de01fd80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f96ddf9bf4b in QDBusConnectionManager::run (this=0x7f96de01fd80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#9  0x00007f96dd433bec in QThreadPrivate::start (arg=0x7f96de01fd80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:329
#10 0x00007f96dc483609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007f96dd0b3293 in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7f96d92d88c0 (LWP 2055)):
[KCrash Handler]
#4  0x00007f96dda22c76 in QScreen::name (this=0x55d9169b3c70) at kernel/qscreen.cpp:195
#5  0x000055d915164694 in ShellCorona::addOutput (this=this@entry=0x55d9169ef690, screen=<optimized out>, screen@entry=0x55d9169b3c70) at ./shell/shellcorona.cpp:1248
#6  0x000055d91516ef43 in ShellCorona::load (this=0x55d9169ef690) at ./shell/shellcorona.cpp:698
#7  0x00007f96dd6506fe in QtPrivate::QSlotObjectBase::call (a=0x7ffe0e682d00, r=0x55d9169ef690, this=0x55d916e0da60) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#8  doActivate<false> (sender=0x55d916c5c340, signal_index=4, argv=0x7ffe0e682d00) at kernel/qobject.cpp:3886
#9  0x00007f96dd649ac7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f96df8ad0c0 <KActivities::Consumer::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe0e682d00) at kernel/qobject.cpp:3946
#10 0x00007f96df87ed85 in KActivities::Consumer::serviceStatusChanged (this=<optimized out>, _t1=<optimized out>) at ./obj-x86_64-linux-gnu/src/lib/KF5Activities_autogen/EWIEGA46WW/moc_consumer.cpp:253
#11 0x00007f96dd6506fe in QtPrivate::QSlotObjectBase::call (a=0x7ffe0e682e20, r=0x55d916c5c340, this=0x55d916c7f340) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#12 doActivate<false> (sender=0x55d916c4dd50, signal_index=11, argv=0x7ffe0e682e20) at kernel/qobject.cpp:3886
#13 0x00007f96dd649ac7 in QMetaObject::activate (sender=sender@entry=0x55d916c4dd50, m=m@entry=0x7f96df8ad180 <KActivities::ActivitiesCache::staticMetaObject>, local_signal_index=local_signal_index@entry=8, argv=argv@entry=0x7ffe0e682e20) at kernel/qobject.cpp:3946
#14 0x00007f96df87ed25 in KActivities::ActivitiesCache::serviceStatusChanged (this=this@entry=0x55d916c4dd50, _t1=<optimized out>, _t1@entry=KActivities::Consumer::Running) at ./obj-x86_64-linux-gnu/src/lib/KF5Activities_autogen/EWIEGA46WW/moc_activitiescache_p.cpp:412
#15 0x00007f96df897c96 in KActivities::ActivitiesCache::setAllActivities (this=this@entry=0x55d916c4dd50, _activities=...) at ./src/lib/activitiescache_p.cpp:270
#16 0x00007f96df897ecd in KActivities::ActivitiesCache::passInfoFromReply<QList<ActivityInfo>, void (KActivities::ActivitiesCache::*)(QList<ActivityInfo> const&)> (f=(void (KActivities::ActivitiesCache::*)(KActivities::ActivitiesCache * const, const QList<ActivityInfo> &)) 0x7f96df897b20 <KActivities::ActivitiesCache::setAllActivities(QList<ActivityInfo> const&)>, watcher=0x55d916c5f460, this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:164
#17 KActivities::ActivitiesCache::setAllActivitiesFromReply (this=<optimized out>, watcher=0x55d916c5f460) at ./src/lib/activitiescache_p.cpp:195
#18 0x00007f96df87f5ef in KActivities::ActivitiesCache::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/src/lib/KF5Activities_autogen/EWIEGA46WW/moc_activitiescache_p.cpp:201
#19 0x00007f96dd650730 in doActivate<false> (sender=0x55d916c5f460, signal_index=3, argv=0x7ffe0e6830c0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395
#20 0x00007f96dd649ac7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f96de01e5e0 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe0e6830c0) at kernel/qobject.cpp:3946
#21 0x00007f96ddfff0a3 in QDBusPendingCallWatcher::finished (this=<optimized out>, _t1=<optimized out>) at .moc/moc_qdbuspendingcall.cpp:158
#22 0x00007f96ddfff1a8 in QDBusPendingCallWatcherPrivate::_q_finished (this=<optimized out>) at qdbuspendingcall.cpp:494
#23 QDBusPendingCallWatcher::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qdbuspendingcall.cpp:86
#24 0x00007f96dd647279 in QObject::event (this=0x55d916c5f460, e=0x55d9169ecdf0) at kernel/qobject.cpp:1314
#25 0x00007f96de317dc3 in QApplicationPrivate::notify_helper (this=this@entry=0x55d9169a8310, receiver=receiver@entry=0x55d916c5f460, e=e@entry=0x55d9169ecdf0) at kernel/qapplication.cpp:3632
#26 0x00007f96de320bb8 in QApplication::notify (this=0x7ffe0e6837e0, receiver=0x55d916c5f460, e=0x55d9169ecdf0) at kernel/qapplication.cpp:3156
#27 0x00007f96dd6196da in QCoreApplication::notifyInternal2 (receiver=0x55d916c5f460, event=0x55d9169ecdf0) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325
#28 0x00007f96dd61bfe1 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x55d91699d2c0) at kernel/qcoreapplication.cpp:1817
#29 0x00007f96dd674987 in postEventSourceDispatch (s=0x55d9169cb6f0) at kernel/qeventdispatcher_glib.cpp:277
#30 0x00007f96db91217d in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f96db912400 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f96db9124a3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f96dd673fe2 in QEventDispatcherGlib::processEvents (this=0x55d9169c9510, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#34 0x00007f96dd6181eb in QEventLoop::exec (this=this@entry=0x7ffe0e683690, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#35 0x00007f96dd620394 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#36 0x000055d91513cefe in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:251
[Inferior 1 (process 2055) detached]

Reported using DrKonqi