STEPS TO REPRODUCE 1. run QT_QPA_PLATFORM=wayland marble-maps OBSERVED RESULT terrible tearing of the window EXPECTED RESULT the window shouldn't tear SOFTWARE/OS VERSIONS Linux/KDE Plasma: Debian testing/unstable (available in About System) KDE Plasma Version: n/a KDE Frameworks Version: 5.100 Qt Version: 5.16.6 ADDITIONAL INFORMATION This is part of the log: ``` QObject::disconnect: Unexpected nullptr parameter kf.kirigami: The Theme singleton is deprecated (since 5.39). Import Kirigami 2.2 or higher and use the attached property instead. kf.kirigami: Failed to find a Kirigami platform plugin QMetaProperty::read: Unable to handle unregistered datatype 'MarbleMap*' for property 'Marble::MarbleMaps_QML_180::marbleMap' qrc:/MainScreen.qml:443:9: QML Row: Cannot specify left, right, horizontalCenter, fill or centerIn anchors for items inside Row. Row will not function. qrc:/MainScreen.qml:319:21: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/Page.qml:364: Error: Cannot assign QObject* to PageRow_QMLTYPE_110* file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/Page.qml:364: Error: Cannot assign QObject* to PageRow_QMLTYPE_110* qrc:/RoutingManager.qml:15:5: Unable to assign [undefined] to [unknown property type] qrc:/MainScreen.qml:521: TypeError: Cannot read property 'longitude' of undefined QMetaProperty::read: Unable to handle unregistered datatype 'MarbleMap*' for property 'Marble::MarbleMaps_QML_180::marbleMap' QMetaProperty::read: Unable to handle unregistered datatype 'MarbleMap*' for property 'Marble::MarbleMaps_QML_180::marbleMap' file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/BasicListItem.qml:276:18: QML QQuickItem*: Binding loop detected for property "implicitWidth" QMetaProperty::read: Unable to handle unregistered datatype 'MarbleMap*' for property 'Marble::MarbleMaps_QML_180::marbleMap' QMetaProperty::read: Unable to handle unregistered datatype 'MarbleMap*' for property 'Marble::MarbleMaps_QML_180::marbleMap' qrc:/MainScreen.qml:521: TypeError: Cannot read property 'longitude' of undefined qrc:/RoutingManager.qml:15:5: Unable to assign [undefined] to [unknown property type] qrc:/MainScreen.qml:443:9: QML Row: Cannot specify left, right, horizontalCenter, fill or centerIn anchors for items inside Row. Row will not function. QObject: Cannot create children for a parent that is in a different thread. (Parent is QApplication(0x7fffd859df80), parent's thread is QThread(0x55f081ce11a0), current thread is QSGRenderThread(0x55f0828f3770) QObject: Cannot create children for a parent that is in a different thread. (Parent is Marble::EclipsesPlugin(0x55f081f35430), parent's thread is QThread(0x55f081ce11a0), current thread is QSGRenderThread(0x55f0828f3770) QObject: Cannot create children for a parent that is in a different thread. (Parent is Marble::CompassFloatItem(0x55f081f71990), parent's thread is QThread(0x55f081ce11a0), current thread is QSGRenderThread(0x55f0828f3770) QObject::connect: Cannot queue arguments of type 'GeoDataLineString' (Make sure 'GeoDataLineString' is registered using qRegisterMetaType().) QObject::setParent: Cannot set parent, new parent is in a different thread qrc:/MainScreen.qml:443:9: QML Row: Cannot specify left, right, horizontalCenter, fill or centerIn anchors for items inside Row. Row will not function. qrc:/MainScreen.qml:443:9: QML Row: Cannot specify left, right, horizontalCenter, fill or centerIn anchors for items inside Row. Row will not function. file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/Page.qml:364: Error: Cannot assign QObject* to PageRow_QMLTYPE_110* qrc:/Options.qml:59:9: QML QQuickItem: Binding loop detected for property "implicitHeight" qrc:/Options.qml:38:9: QML QQuickItem: Binding loop detected for property "implicitHeight" file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/Page.qml:364: Error: Cannot assign QObject* to PageRow_QMLTYPE_110* ```
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