michael@0: var x = 42;
michael@0: function f() {
michael@0:     var a = [new Date, new Date, new Date, new Date, new Date];
michael@0:     for (var i = 0; i < 5; i++)
michael@0:         a[i].m = function () {return x};
michael@0:     for (i = 0; i < 4; i++)
michael@0:         if (a[i].m == a[i+1].m)
michael@0:             throw "FAIL!";
michael@0: }
michael@0: f();