--TEST--
Bug #72598 (Reference is lost after array_slice())
--FILE--
<?php
function ref(&$ref) {
    var_dump($ref);
}

new class {
        function __construct() {
                $args = [&$this];
                for ($i = 0; $i < 2; $i++) {
                        $a = array_slice($args, 0, 1);
                        call_user_func_array('ref', $a);
                }
        }
};
?>
--EXPECTF--
Warning: ref(): Argument #1 ($ref) must be passed by reference, value given in %s on line %d
object(class@anonymous)#1 (0) {
}

Warning: ref(): Argument #1 ($ref) must be passed by reference, value given in %s on line %d
object(class@anonymous)#1 (0) {
}