michael@0: 
michael@0: function f() {
michael@0:     var x = NaN;
michael@0:     if (2 > 0) {}
michael@0:     var y = {};
michael@0:     var z = (1234 - x);
michael@0:     y.foo = z;
michael@0:     assertEq(x, NaN);
michael@0: }
michael@0: f();