Description:
------------
Since you fixed this issue:
"Fixed inheritance check to control return by reference and pass by reference correctly (ArrayAccess can no longer support references correctly)."

offsetGet doesn't work correctly not only with references.

I would suggest you to change interface and require return by reference for offsetGet. This would fix also issues regarding references. 

Reproduce code:
---------------
class C { public $x; }
$z = new C;

class ArrayClass implements ArrayAccess 
{
    function offsetGet($index) 
    {
        global $z;
        $result = array("obj" => $z);
        return $result;
    }
    
    function offsetSet($index, $newval) { }
    function offsetExists($index) { }
    function offsetUnset($index) { }
}

$obj = new ArrayClass();
$obj["index"]["obj"]->x = 10;

Expected result:
----------------
I would expect no error. The code is imho correct.

Actual result:
--------------
Fatal error:  Objects used as arrays in post/pre increment/decrement must return values by reference.