Description:
------------
Trying to assigned a specific array index of an object property, when __set() been defined and will catch the __set() call, causes a fatal error.

This is similar to bug 28444.  That bug has the same error, but the code that produces it is different.

Reproduce code:
---------------
class Sub
{
	function __get($prop)
	{
		echo "Property $prop called\n";
	}

	function __set($prop, $val)
	{
		echo "Property $prop set to $val\n";
	}
}


$foo = new Sub();

$foo->someProp[0] = 'apple';
echo $foo->someProp[0];

Expected result:
----------------
apple

Actual result:
--------------
Fatal error: Cannot access undefined property for object with overloaded property access in test.php on line 18