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