Description:
------------
output should be identical to pre 5.6

Test script:
---------------
<?php

class A
{
    private $field;
    
    function __construct(){
        $this->field = new B;
    }
    
    function __debugInfo(){
        return ["should only appear in dump"];
    }
}

class B
{
    private $field;
    
    function __construct(){
        $this->field = new stdclass;
    }
    
    function __debugInfo(){
        return ["should only appear in dump"];
    }
}

$not_debug = (array)new A;

var_dump($not_debug);