Loader loads it's contents even when the new active property is set to false

New active property allows convenient syntax for conditionally loading content inside QML application. Unfortunately it doesn't work as you would expect: Loader loads it's contents even when active property is set to false. Loader source component should never be executed in the below code example, but currently it is because QSGLoader::componentComplete() always loads the sourceComponent if it has been defined.

import QtQuick 2.0

Rectangle {
    color: "blue"
    width: 100; height: 100
    Loader {
        active: false
        anchors.fill: parent
        sourceComponent: Rectangle { color: "red" }
        onLoaded: console.log("Source loaded")
    }
}