bug: drawable variable doesn't know it's type: Cannot determine type for creation

function draw1(dc as Dc) {
    var statusIconId = Rez.Drawables.pause;
    var statusIcon = new statusIconId(); // WARN: Cannot determine type for creation.
	statusIcon.draw(dc); // WARN: Cannot determine type for method invocation.
}

function draw2(dc as Dc, isPaused as Boolean) {
    var statusIconId = isPaused ? Rez.Drawables.pause : Rez.Drawables.stop;
    var statusIcon = new statusIconId(); // ERROR: Cannot instantiate object of type 'PolyType<$.Rez.Drawables.pause or $.Rez.Drawables.stop>'.
	statusIcon.draw(dc); // WARN: Cannot determine type for method invocation.
}