--TEST--
Bug #78409: Segfault when creating instance of ArrayIterator without constructor
--FILE--
<?php
$a = new ArrayObject;
$u = [
0,
[],
[],
];
$a->__unserialize($u);
var_dump($u);
?>
--EXPECT--
array(3) {
[0]=>
int(0)
[1]=>
array(0) {
}
[2]=>
array(0) {
}
}