Qml Viewer is not starting if dummydata contains invalid qml file

The designer is extending the dummydata idea with a special dummycontext file:

filename_dummycontext.qml:

import QtQuick 1.0
import QmlDesigner 1.0

DummyContextObject {
parent: QtObject

{ property real width: 400 property real height: 400 }

}

It is providing a dummy context for a object. The qml viewer should simply skip all file with _dummydata.qml.