var x=null; 
var y=3+x;  
var z=3+null; 
class C {
}
function f() {
    return null;
    return new C();
}
function g() {
    return null;
    return 3;
}
interface I {
    x:any;
    y:number;
}
var w:I={x:null,y:3};


