While trying to get some corner cases correct around scoping and shadowing I noticed that engine 262 disagrees with v8 and jsc when evaluating the following

function h() {
    function f() { return 1; }
    var r = "";
    r += f();
    for (var i = 0; i < 10; i++) {
        r += f();
        function f() { return 0;}
    }
    r += f();
    return r;
}
h();