michael@0: var s;
michael@0: 
michael@0: function f(i) {
michael@0:     if (i > 4) /* side exit when arr[i] changes from bool to undefined (via a hole) */
michael@0:         assertEq(s, undefined);
michael@0:     else
michael@0:         assertEq(s, false);
michael@0:     return 1;
michael@0: }
michael@0: 
michael@0: /* trailing 'true' ensures array has capacity >= 10 */
michael@0: var arr = [ false, false, false, false, false, , , , , , true ];
michael@0: 
michael@0: for (var i = 0; i < 10; ++i) {
michael@0:     (s = arr[i]) + f(i);
michael@0: }