michael@0: function K(x) {
michael@0:   with ({});    // prevent compilation
michael@0:   this.x = x; 
michael@0: }
michael@0: function f() {
michael@0:   var a = new K(1);
michael@0:   var b = new K(2);
michael@0:   return (a == b);
michael@0: }
michael@0: assertEq(f(), false);