https://bugs.kde.org/show_bug.cgi?id=450164

--- Comment #3 from Nicolas Fella <nicolas.fe...@gmx.de> ---
#0  0x00007ffff5990c22 in QQmlData::wasDeleted (object=0xb091d0)
    at
../../include/QtQml/5.15.2/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:338
#1  QV4::QObjectWrapper::getQmlProperty (engine=engine@entry=0x1c8cd30,
qmlContext=qmlContext@entry=0x1d7e0d0, object=0xb091d0, 
    name=0x7fff8e71d5e8,
revisionMode=revisionMode@entry=QV4::QObjectWrapper::CheckRevision,
hasProperty=hasProperty@entry=0x7fffffff8ac8, 
    property=0x7fffffff8ad0) at jsruntime/qv4qobjectwrapper.cpp:360
#2  0x00007ffff5971b3a in QV4::QQmlContextWrapper::getPropertyAndBase
(resource=<optimized out>, id=..., receiver=<optimized out>, 
    hasProperty=0x7fffffff8b4f, base=0x0, lookup=0x0) at
jsruntime/qv4qmlcontext.cpp:316
#3  0x00007ffff5972423 in
QV4::QQmlContextWrapper::resolveQmlContextPropertyLookupGetter (l=0x193db00,
engine=0x1c8cd30, base=0x0)
    at jsruntime/qv4qmlcontext.cpp:481
--Type <RET> for more, q to quit, c to continue without paging--c
#4  0x00007ffff59ac848 in QV4::Moth::VME::interpret (frame=0x7fffffff8d20,
engine=0x1c8cd30, code=0x7fffa80c1a0b <error: Cannot access memory at address
0x7fffa80c1a0b>) at jsruntime/qv4vme_moth.cpp:585
#5  0x00007ffff59b16b7 in QV4::Moth::VME::exec
(frame=frame@entry=0x7fffffff8d20, engine=engine@entry=0x1c8cd30) at
jsruntime/qv4vme_moth.cpp:463
#6  0x00007ffff595064a in QV4::Function::call (this=this@entry=0x1a52630,
thisObject=<optimized out>, argv=argv@entry=0x7fff8e71d500, argc=<optimized
out>, context=<optimized out>) at jsruntime/qv4function.cpp:69
#7  0x00007ffff5ab8db6 in QQmlJavaScriptExpression::evaluate (this=0x1ea8d00,
this@entry=<error reading variable: Cannot access memory at address
0x7fffffff8ee0>, callData=callData@entry=0x7fff8e71d4d0,
isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:212
#8  0x00007ffff5a6fbc6 in QQmlBoundSignalExpression::evaluate (this=<optimized
out>, a=<optimized out>) at
../../include/QtQml/5.15.2/QtQml/private/../../../../../src/qml/jsruntime/qv4jscall_p.h:95
#9  0x00007ffff5a70098 in QQmlBoundSignal_callback (e=0x1ea8c80, a=0x0) at
../../include/QtQml/5.15.2/QtQml/private/../../../../../src/qml/qml/qqmlboundsignalexpressionpointer_p.h:69
#10 0x00007ffff5a9da76 in QQmlNotifier::emitNotify (endpoint=<optimized out>,
a=0x0) at qml/qqmlnotifier.cpp:104
#11 0x00007ffff69f25fb in void doActivate<false>(QObject*, int, void**) () from
/lib64/libQt5Core.so.5
#12 0x00007ffff5a6bb49 in QQmlContextData::emitDestruction (this=<optimized
out>) at qml/qqmlcontext.cpp:580
#13 QQmlContextData::emitDestruction (this=0x1ea3980) at
qml/qqmlcontext.cpp:564
#14 0x00007ffff5a6bb6f in QQmlContextData::emitDestruction (this=<optimized
out>) at qml/qqmldata_p.h:102
#15 QQmlContextData::emitDestruction (this=<optimized out>) at
qml/qqmlcontext.cpp:564
#16 0x00007ffff5a6bb6f in QQmlContextData::emitDestruction (this=<optimized
out>) at qml/qqmldata_p.h:102
#17 QQmlContextData::emitDestruction (this=<optimized out>) at
qml/qqmlcontext.cpp:564
#18 0x00007ffff5a6bb6f in QQmlContextData::emitDestruction (this=<optimized
out>) at qml/qqmldata_p.h:102
#19 QQmlContextData::emitDestruction (this=<optimized out>) at
qml/qqmlcontext.cpp:564
#20 0x00007ffff5a6bb6f in QQmlContextData::emitDestruction (this=<optimized
out>) at qml/qqmldata_p.h:102
#21 QQmlContextData::emitDestruction (this=<optimized out>) at
qml/qqmlcontext.cpp:564
#22 0x00007ffff5a6bd99 in QQmlContextData::invalidate
(this=this@entry=0x1d7e0d0) at qml/qqmlcontext.cpp:594
#23 0x00007ffff5a6b8d7 in QQmlContextData::destroy (this=0x1d7e0d0) at
qml/qqmlcontext.cpp:650
#24 0x00007ffff5a6bab1 in QQmlContext::~QQmlContext (this=0x1ce1db0,
__in_chrg=<optimized out>) at qml/qqmlcontext.cpp:222
#25 0x00007ffff5a6bac9 in QQmlContext::~QQmlContext (this=0x1ce1db0,
__in_chrg=<optimized out>) at qml/qqmlcontext.cpp:223
#26 0x00007ffff69e66df in QObjectPrivate::deleteChildren() () from
/lib64/libQt5Core.so.5
#27 0x00007ffff69f0e44 in QObject::~QObject() () from /lib64/libQt5Core.so.5
#28 0x00007ffff618b6f9 in
KDeclarative::QmlObjectSharedEngine::~QmlObjectSharedEngine() () from
/lib64/libKF5Declarative.so.5
#29 0x00007ffff7e7dfbe in KQuickAddons::ConfigModule::~ConfigModule() () from
/lib64/libKF5QuickAddons.so.5
#30 0x00007fffa80d0202 in ScreenLockerKcm::~ScreenLockerKcm() () from
/usr/lib64/qt5/plugins/kcms/kcm_screenlocker.so
#31 0x00007ffff7f712c3 in KCModuleQml::~KCModuleQml() () from
/lib64/libKF5KCMUtils.so.5
#32 0x00007ffff7f712e9 in KCModuleQml::~KCModuleQml() () from
/lib64/libKF5KCMUtils.so.5
#33 0x00007ffff7f77014 in KCModuleProxy::deleteClient() () from
/lib64/libKF5KCMUtils.so.5
#34 0x00007ffff7f7717c in KCModuleProxy::~KCModuleProxy() () from
/lib64/libKF5KCMUtils.so.5
#35 0x00007ffff7f77219 in KCModuleProxy::~KCModuleProxy() () from
/lib64/libKF5KCMUtils.so.5
#36 0x00007ffff69e66df in QObjectPrivate::deleteChildren() () from
/lib64/libQt5Core.so.5
#37 0x00007ffff75d69b6 in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#38 0x00007ffff75d6cd9 in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#39 0x00007ffff69e66df in QObjectPrivate::deleteChildren() () from
/lib64/libQt5Core.so.5
#40 0x00007ffff75d69b6 in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#41 0x00007ffff772ab39 in QScrollArea::~QScrollArea() () from
/lib64/libQt5Widgets.so.5
#42 0x00007ffff7cdd64a in KPageWidgetItem::~KPageWidgetItem() () from
/lib64/libKF5WidgetsAddons.so.5
#43 0x00007ffff7cdd725 in PageItem::~PageItem() () from
/lib64/libKF5WidgetsAddons.so.5
#44 0x00007ffff7cdd8ed in KPageWidgetModel::removePage(KPageWidgetItem*) ()
from /lib64/libKF5WidgetsAddons.so.5
#45 0x00007ffff7faf685 in ModuleView::closeModules (this=0x811920) at
/usr/src/debug/systemsettings-5.20.4-2.mga8.x86_64/core/ModuleView.cpp:287
#46 0x00007fffdc0c1db1 in SidebarMode::loadModule (this=0x712630,
activeModule=..., args=...) at
/usr/src/debug/systemsettings-5.20.4-2.mga8.x86_64/sidebar/SidebarMode.cpp:461
#47 0x00007fffdc0c2679 in SidebarMode::loadModule (this=<optimized out>,
activeModule=..., args=...) at /usr/include/qt5/QtCore/qabstractitemmodel.h:76

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