MapPolygon with empty path segmentation fault when using the mapboxgl plugin

import QtQuick 2.8
import QtQuick.Window 2.2
import QtPositioning 5.8
import QtLocation 5.9

Window {
    visible: true
    width: 640
    height: 480

    Map {
        anchors.fill: parent
        plugin: Plugin {
            name: "mapboxgl"
        }
        center: QtPositioning.coordinate(60,10);

        MapPolygon {

        }
    }
}