signal not found when deleting QAbstractItemModel

import QtQuick
import QtQuick.ControlsWindow {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")    TreeView {
        anchors.fill: parent
        model: fsModel
        selectionModel: ItemSelectionModel {}
    }
} 

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QFileSystemModel>int main(int argc, char *argv[]) {
    QGuiApplication app(argc, argv);
    QQmlApplicationEngine engine;
    QFileSystemModel model;
    model.setRootPath(QDir::currentPath());
    engine.rootContext()->setContextProperty("fsModel", &model);
    engine.loadFromModule("quicktest", "Main");
    return app.exec();
}

qt.core.qobject.connect: QObject::disconnect: No such signal QObject::rowsAboutToBeRemoved(QModelIndex,int,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::columnsAboutToBeRemoved(QModelIndex,int,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::rowsAboutToBeInserted(QModelIndex,int,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::columnsAboutToBeInserted(QModelIndex,int,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::rowsAboutToBeMoved(QModelIndex,int,int,QModelIndex,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::columnsAboutToBeMoved(QModelIndex,int,int,QModelIndex,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::rowsMoved(QModelIndex,int,int,QModelIndex,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::columnsMoved(QModelIndex,int,int,QModelIndex,int)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::layoutAboutToBeChanged(QList<QPersistentModelIndex>,QAbstractItemModel::LayoutChangeHint)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::layoutChanged(QList<QPersistentModelIndex>,QAbstractItemModel::LayoutChangeHint)
qt.core.qobject.connect: QObject::disconnect: No such signal QObject::modelReset()