PathSvg doesn't work with PathAnimation

Rectangle {
        id: rect
        width: 50
        height: 50
        x: 100
        y: 100
        color: "orange"
    }

    PathAnimation {
        target: rect
        duration: 5000
        running: true
        path: Path {
            startX: 100
            startY: 100
            PathSvg {
                path: "M 100 100 L 300 100 L 200 300 z"
            }
        }
    }