Multiple useless property bindings

rectangle updated toprect.width=320
rectangle updated toprect.width=640
rectangle updated toprect.width=320

import Qt 4.7

Rectangle {
    id: toprect
    width: 320
    height: 240

    Rectangle {
        color:"yellow"
        width: { console.log("rectangle updated toprect.width="+toprect.width); toprect.width*2/3 }
        height: toprect.height*2/3
    }

    Text {
        anchors.centerIn: parent
        text: "Hello World"
    }
}