Bug 429111

Application: systemsettings5 (5.20.0)
 (Compiled from sources)
Qt Version: 5.15.2
Frameworks Version: 5.76.0
Operating System: Linux 5.4.0-53-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.04.1 LTS

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

Was trying to figure out why the duplicate kscreen entry wasn't working. The crash happened as I was editing the details of disabled screen.

The crash can be reproduced sometimes.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Content of s_kcrashErrorMessage: (null)
[New LWP 18763]
[New LWP 18764]
[New LWP 18769]
[New LWP 18770]
[New LWP 18774]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f7557913aff in __GI___poll (fds=fds@entry=0x7fff359e85f8, nfds=nfds@entry=1, timeout=timeout@entry=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
[Current thread is 1 (Thread 0x7f75536a3840 (LWP 18761))]

Thread 6 (Thread 0x7f7523fff700 (LWP 18774)):
#0  0x00007f7557913aff in __GI___poll (fds=0x7f751c004a60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f75559701ae in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f75559702e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7557f2005b in QEventDispatcherGlib::processEvents (this=0x7f751c000b60, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7557ec1c8b in QEventLoop::exec (this=this@entry=0x7f7523ffed40, flags=..., flags@entry=...) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:141
#5  0x00007f7557cd8b82 in QThread::exec (this=this@entry=0x556e500564b0) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:121
#6  0x00007f7556e483f9 in QQmlThreadPrivate::run (this=0x556e500564b0) at /src/qt5/qtdeclarative/src/qml/qml/ftw/qqmlthread.cpp:155
#7  0x00007f7557cd9d3b in QThreadPrivate::start (arg=0x556e500564b0) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:329
#8  0x00007f7556293609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f7557920293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f752ffff700 (LWP 18770)):
#0  0x00007f7557913aff in __GI___poll (fds=0x7f7524004a30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f75559701ae in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f75559702e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7557f2005b in QEventDispatcherGlib::processEvents (this=0x7f7524000b60, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7557ec1c8b in QEventLoop::exec (this=this@entry=0x7f752fffed40, flags=..., flags@entry=...) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:141
#5  0x00007f7557cd8b82 in QThread::exec (this=this@entry=0x556e4dac2e40) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:121
#6  0x00007f7556e483f9 in QQmlThreadPrivate::run (this=0x556e4dac2e40) at /src/qt5/qtdeclarative/src/qml/qml/ftw/qqmlthread.cpp:155
#7  0x00007f7557cd9d3b in QThreadPrivate::start (arg=0x556e4dac2e40) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:329
#8  0x00007f7556293609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f7557920293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f7542643700 (LWP 18769)):
#0  0x00007f7557913aff in __GI___poll (fds=0x7f7528005240, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f75559701ae in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f75559702e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7557f2005b in QEventDispatcherGlib::processEvents (this=0x7f7528000b60, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7557ec1c8b in QEventLoop::exec (this=this@entry=0x7f7542642d40, flags=..., flags@entry=...) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:141
#5  0x00007f7557cd8b82 in QThread::exec (this=this@entry=0x556e4dc5b8c0) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:121
#6  0x00007f7556e483f9 in QQmlThreadPrivate::run (this=0x556e4dc5b8c0) at /src/qt5/qtdeclarative/src/qml/qml/ftw/qqmlthread.cpp:155
#7  0x00007f7557cd9d3b in QThreadPrivate::start (arg=0x556e4dc5b8c0) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:329
#8  0x00007f7556293609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f7557920293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f75515d3700 (LWP 18764)):
#0  0x00007f7557913aff in __GI___poll (fds=0x7f7544015200, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f75559701ae in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f75559702e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7557f2005b in QEventDispatcherGlib::processEvents (this=0x7f7544000b60, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7557ec1c8b in QEventLoop::exec (this=this@entry=0x7f75515d2d20, flags=..., flags@entry=...) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:141
#5  0x00007f7557cd8b82 in QThread::exec (this=this@entry=0x7f7556ad5dc0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:121
#6  0x00007f7556a4987c in QDBusConnectionManager::run (this=0x7f7556ad5dc0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at /src/qt5/qtbase/src/dbus/qdbusconnection.cpp:179
#7  0x00007f7557cd9d3b in QThreadPrivate::start (arg=0x7f7556ad5dc0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:329
#8  0x00007f7556293609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f7557920293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f75529b1700 (LWP 18763)):
#0  0x00007f7557913aff in __GI___poll (fds=0x7f75529b0c68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f75562bdc1a in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f75562bf90a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f7552fce1f8 in QXcbEventQueue::run (this=0x556e4d845ea0) at /src/qt5/qtbase/src/plugins/platforms/xcb/qxcbeventqueue.cpp:228
#4  0x00007f7557cd9d3b in QThreadPrivate::start (arg=0x556e4d845ea0) at /src/qt5/qtbase/src/corelib/thread/qthread_unix.cpp:329
#5  0x00007f7556293609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f7557920293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f75536a3840 (LWP 18761)):
[KCrash Handler]
#6  KScreen::Mode::size (this=this@entry=0x0) at /src/kdesrc/kde/workspace/libkscreen/src/mode.cpp:102
#7  0x00007f752ed1f598 in OutputModel::<lambda(const ModePtr&)>::operator() (mode=..., __closure=<optimized out>) at /src/kdesrc/kde/workspace/kscreen/kcm/output_model.cpp:373
#8  __gnu_cxx::__ops::_Iter_pred<OutputModel::setRefreshRate(int, int)::<lambda(const ModePtr&)> >::operator()<QMap<QString, QSharedPointer<KScreen::Mode> >::const_iterator> (__it=..., this=<optimized out>) at /usr/include/c++/9/bits/predefined_ops.h:283
#9  std::__find_if<QMap<QString, QSharedPointer<KScreen::Mode> >::const_iterator, __gnu_cxx::__ops::_Iter_pred<OutputModel::setRefreshRate(int, int)::<lambda(const ModePtr&)> > > (__pred=..., __last=..., __first=...) at /usr/include/c++/9/bits/stl_algo.h:104
#10 std::__find_if<QMap<QString, QSharedPointer<KScreen::Mode> >::const_iterator, __gnu_cxx::__ops::_Iter_pred<OutputModel::setRefreshRate(int, int)::<lambda(const ModePtr&)> > > (__pred=..., __last=..., __first=...) at /usr/include/c++/9/bits/stl_algo.h:161
#11 std::find_if<QMap<QString, QSharedPointer<KScreen::Mode> >::const_iterator, OutputModel::setRefreshRate(int, int)::<lambda(const ModePtr&)> > (__pred=..., __last=..., __first=...) at /usr/include/c++/9/bits/stl_algo.h:3963
#12 OutputModel::setRefreshRate (this=this@entry=0x556e50cbf050, outputIndex=1, refIndex=<optimized out>) at /src/kdesrc/kde/workspace/kscreen/kcm/output_model.cpp:375
#13 0x00007f752ed22115 in OutputModel::setData (this=0x556e50cbf050, index=..., value=..., role=269) at /opt/qt5/include/QtCore/qabstractitemmodel.h:62
#14 0x00007f75556d8926 in non-virtual thunk to VDMModelDelegateDataType::metaCall(QObject*, QMetaObject::Call, int, void**) () from /opt/qt5/lib/libQt5QmlModels.so.5
#15 0x00007f7556d7fe32 in QQmlPropertyData::writeProperty (flags=..., value=0x7fff359e9220, target=0x556e51646a50, this=0x556e50057648) at ../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/qml/qqmlpropertydata_p.h:379
#16 QQmlPropertyPrivate::write (object=<optimized out>, property=..., value=..., context=<optimized out>, flags=...) at /src/qt5/qtdeclarative/src/qml/qml/qqmlproperty.cpp:1305
#17 0x00007f7556c99fb1 in QV4::QObjectWrapper::setProperty (engine=0x556e500aca10, object=0x556e51646a50, property=0x556e50057648, value=...) at /src/qt5/build1/qtbase/include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:120
#18 0x00007f7556c9aa8e in QV4::QObjectWrapper::setQmlProperty (engine=0x556e500aca10, qmlContext=<optimized out>, object=0x556e51646a50, name=<optimized out>, revisionMode=QV4::QObjectWrapper::IgnoreRevision, value=...) at /src/qt5/qtdeclarative/src/qml/jsruntime/qv4qobjectwrapper.cpp:435
#19 0x00007f7556c9ac07 in QV4::QObjectWrapper::virtualPut(QV4::Managed*, QV4::PropertyKey, QV4::Value const&, QV4::Value*) () at /usr/include/c++/9/bits/atomic_base.h:413
#20 0x00007f7556c1831c in QV4::Object::put (receiver=0x7f752c199588, v=..., name=0x7f752c199590, this=0x7f752c199588) at ../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/jsruntime/qv4string_p.h:167
#21 QV4::Lookup::setterFallback (l=<optimized out>, engine=0x556e500aca10, object=..., value=...) at /src/qt5/qtdeclarative/src/qml/jsruntime/qv4lookup.cpp:497
#22 0x00007f7556cb48f3 in QV4::Moth::VME::interpret (frame=0x0, engine=0x556e500aca10, code=0x7f752ebf7e21 "\016\002") at /src/qt5/qtdeclarative/src/qml/jsruntime/qv4vme_moth.cpp:653
#23 0x00007f7556cb9fa7 in QV4::Moth::VME::exec (frame=frame@entry=0x7fff359e9580, engine=engine@entry=0x556e500aca10) at /src/qt5/qtdeclarative/src/qml/jsruntime/qv4vme_moth.cpp:463
#24 0x00007f7556c4587e in QV4::Function::call (this=this@entry=0x556e50cc20b0, thisObject=<optimized out>, argv=argv@entry=0x7f752c199508, argc=<optimized out>, context=<optimized out>) at /src/qt5/qtdeclarative/src/qml/jsruntime/qv4function.cpp:69
#25 0x00007f7556df9777 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x556e516d8170, callData=callData@entry=0x7f752c1994d8, isUndefined=isUndefined@entry=0x0) at ../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/jsruntime/qv4value_p.h:343
#26 0x00007f7556d94f4e in QQmlBoundSignalExpression::evaluate (this=<optimized out>, a=<optimized out>) at ../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/jsruntime/qv4jscall_p.h:95
#27 0x00007f7556d95ff8 in QQmlBoundSignal_callback (e=0x556e516d3890, a=0x7fff359eb2b0) at ../../include/QtQml/5.15.2/QtQml/private/../../../../../../../qtdeclarative/src/qml/qml/qqmlboundsignalexpressionpointer_p.h:69
#28 0x00007f7556dd519c in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7fff359eb2b0) at /src/qt5/qtdeclarative/src/qml/qml/qqmlnotifier.cpp:104
#29 0x00007f7556d72ef7 in QQmlData::signalEmitted (object=0x556e516b15d0, index=61, a=0x7fff359eb2b0) at /src/qt5/qtdeclarative/src/qml/qml/qqmlengine.cpp:834
#30 0x00007f7557efa1f5 in doActivate<false> (sender=0x556e516b15d0, signal_index=61, argv=0x7fff359eb2b0) at /src/qt5/qtbase/src/corelib/kernel/qobject_p.h:110
#31 0x00007f7557ef4177 in QMetaObject::activate (sender=sender@entry=0x556e516b15d0, m=m@entry=0x7f7551c7b000 <QQuickComboBox::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff359eb2b0) at /src/qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#32 0x00007f7551c0c012 in QQuickComboBox::activated (this=this@entry=0x556e516b15d0, _t1=<optimized out>) at .moc/moc_qquickcombobox_p.cpp:759
#33 0x00007f7551b75858 in QQuickComboBoxPrivate::hidePopup (accept=true, this=0x556e516b1690) at /src/qt5/qtquickcontrols2/src/quicktemplates2/qquickcombobox.cpp:323
#34 QQuickComboBoxPrivate::itemClicked (this=0x556e516b1690) at /src/qt5/qtquickcontrols2/src/quicktemplates2/qquickcombobox.cpp:364
#35 0x00007f7557efa675 in QtPrivate::QSlotObjectBase::call (a=0x7fff359eb390, r=0x556e516b15d0, this=0x556e50f42ee0) at ../../include/QtCore/../../../../qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#36 doActivate<false> (sender=0x556e510d32f0, signal_index=64, argv=0x7fff359eb390) at /src/qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#37 0x00007f7551b634f1 in QQuickAbstractButtonPrivate::handleRelease (this=0x556e518a4280, point=...) at /src/qt5/qtquickcontrols2/src/quicktemplates2/qquickabstractbutton.cpp:182
#38 0x00007f7551b88419 in QQuickControl::mouseReleaseEvent (this=<optimized out>, event=0x7fff359ebc20) at /src/qt5/qtquickcontrols2/src/quicktemplates2/qquickcontrol.cpp:219
#39 0x00007f75572373c8 in QQuickItem::event (this=0x556e510d32f0, ev=0x7fff359ebc20) at /src/qt5/qtdeclarative/src/quick/items/qquickitem.cpp:8131
#40 0x00007f7558b27e23 in QApplicationPrivate::notify_helper (this=this@entry=0x556e4d839740, receiver=receiver@entry=0x556e510d32f0, e=e@entry=0x7fff359ebc20) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#41 0x00007f7558b2f650 in QApplication::notify (this=0x7fff359ecbb0, receiver=0x556e510d32f0, e=0x7fff359ebc20) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3156
#42 0x00007f7557ec31a8 in QCoreApplication::notifyInternal2 (receiver=0x556e510d32f0, event=0x7fff359ebc20) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../qtbase/src/corelib/thread/qthread_p.h:325
#43 0x00007f75572540e5 in QQuickWindowPrivate::deliverMouseEvent (this=this@entry=0x556e4db0cf90, pointerEvent=0x556e4dbb1930) at /src/qt5/qtdeclarative/src/quick/items/qquickwindow.cpp:2020
#44 0x00007f7557255982 in QQuickWindowPrivate::deliverPointerEvent (this=this@entry=0x556e4db0cf90, event=0x556e4dbb1930) at /src/qt5/qtdeclarative/src/quick/items/qquickwindow.cpp:2612
#45 0x00007f7557256b86 in QQuickWindowPrivate::handleMouseEvent (event=0x7fff359ebc20, this=0x556e4db0cf90) at /src/qt5/qtdeclarative/src/quick/items/qquickwindow.cpp:2457
#46 QQuickWindowPrivate::handleMouseEvent (this=0x556e4db0cf90, event=0x7fff359ebc20) at /src/qt5/qtdeclarative/src/quick/items/qquickwindow.cpp:2410
#47 0x00007f755842b74d in QWindow::event (this=this@entry=0x556e500d9fb0, ev=ev@entry=0x7fff359ebc20) at /src/qt5/qtbase/src/gui/kernel/qwindow.cpp:2438
#48 0x00007f75572586cb in QQuickWindow::event (this=0x556e500d9fb0, e=0x7fff359ebc20) at /src/qt5/qtdeclarative/src/quick/items/qquickwindow.cpp:1902
#49 0x00007f7558b27e23 in QApplicationPrivate::notify_helper (this=this@entry=0x556e4d839740, receiver=receiver@entry=0x556e500d9fb0, e=e@entry=0x7fff359ebc20) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#50 0x00007f7558b2f650 in QApplication::notify (this=0x7fff359ecbb0, receiver=0x556e500d9fb0, e=0x7fff359ebc20) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3156
#51 0x00007f7557ec31a8 in QCoreApplication::notifyInternal2 (receiver=0x556e500d9fb0, event=0x7fff359ebc20) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../qtbase/src/corelib/thread/qthread_p.h:325
#52 0x00007f75575ae35b in QQuickWidget::mouseReleaseEvent (this=<optimized out>, e=0x7fff359ec260) at /src/qt5/qtdeclarative/src/quickwidgets/qquickwidget.cpp:1417
#53 0x00007f7558b6e458 in QWidget::event (this=this@entry=0x556e503c2020, event=event@entry=0x7fff359ec260) at /src/qt5/qtbase/src/widgets/kernel/qwidget.cpp:8663
#54 0x00007f75575ae537 in QQuickWidget::event (this=0x556e503c2020, e=0x7fff359ec260) at /src/qt5/qtdeclarative/src/quickwidgets/qquickwidget.cpp:1573
#55 0x00007f7558b27e23 in QApplicationPrivate::notify_helper (this=this@entry=0x556e4d839740, receiver=receiver@entry=0x556e503c2020, e=e@entry=0x7fff359ec260) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#56 0x00007f7558b2f928 in QApplication::notify (this=<optimized out>, receiver=0x556e503c2020, e=0x7fff359ec260) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3076
#57 0x00007f7557ec31a8 in QCoreApplication::notifyInternal2 (receiver=0x556e503c2020, event=0x7fff359ec260) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../qtbase/src/corelib/thread/qthread_p.h:325
#58 0x00007f7558b2eab8 in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x556e503c2020, event=event@entry=0x7fff359ec260, alienWidget=alienWidget@entry=0x556e503c2020, nativeWidget=0x556e4d904c40, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:2614
#59 0x00007f7558b8ae60 in QWidgetWindow::handleMouseEvent (this=0x556e4dd77b80, event=0x7fff359ec6f0) at /usr/include/c++/9/bits/atomic_base.h:413
#60 0x00007f7558b8e1b7 in QWidgetWindow::event (event=0x7fff359ec6f0, this=0x556e4dd77b80) at /src/qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:300
#61 QWidgetWindow::event (this=0x556e4dd77b80, event=0x7fff359ec6f0) at /src/qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:239
#62 0x00007f7558b27e23 in QApplicationPrivate::notify_helper (this=this@entry=0x556e4d839740, receiver=receiver@entry=0x556e4dd77b80, e=e@entry=0x7fff359ec6f0) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#63 0x00007f7558b2f650 in QApplication::notify (this=0x7fff359ecbb0, receiver=0x556e4dd77b80, e=0x7fff359ec6f0) at /src/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3156
#64 0x00007f7557ec31a8 in QCoreApplication::notifyInternal2 (receiver=0x556e4dd77b80, event=0x7fff359ec6f0) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../qtbase/src/corelib/thread/qthread_p.h:325
#65 0x00007f7558420088 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /src/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2282
#66 0x00007f7558421685 in QGuiApplicationPrivate::processWindowSystemEvent (e=0x556e4d8bf3c0) at /src/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2002
#67 0x00007f75583f9fcb in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at /src/qt5/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1169
#68 0x00007f7552fcf90e in xcbSourceDispatch (source=<optimized out>) at /src/qt5/qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:105
#69 0x00007f755596ffbd in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#70 0x00007f7555970240 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#71 0x00007f75559702e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#72 0x00007f7557f20041 in QEventDispatcherGlib::processEvents (this=0x556e4d905800, flags=...) at /src/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#73 0x00007f7557ec1c8b in QEventLoop::exec (this=this@entry=0x7fff359eca90, flags=..., flags@entry=...) at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:141
#74 0x00007f7557eca1e4 in QCoreApplication::exec () at ../../include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:121
#75 0x0000556e4d42111a in main (argc=<optimized out>, argv=0x7fff359ecd18) at /src/kdesrc/kde/workspace/systemsettings/app/main.cpp:207
[Inferior 1 (process 18761) detached]

Possible duplicates by query: bug 421805, bug 416005, bug 371479, bug 347451, bug 343065.

Reported using DrKonqi