Description:
------------
When we cast stdClass with the numeric properties to array, we cannot access the 
value by key. That seems, that this bug is connected with the Bug #60379 where 
casting to (object) is performed. Such objects can be got by json_decode() 
function

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

$obj = new stdClass();

$obj->{'4001'} = 'foo';
$obj->{'4002'} = 'bar';
$obj->{'4003'} = 'baz';

$arr = (array) $obj;
print_r($arr);

foreach($arr as $key => $val) {
  printf('In foreach "$key => $val" key is "%s", val is "%s" but $arr[$key] is "%s" should be "%s"', $key, $val, $arr[$key], $val);
  print("\n");
}

Expected result:
----------------
Array
(
    [4001] => foo
    [4002] => bar
    [4003] => baz
)
....
In foreach "$key => $val" key is "4003", val is "baz" but $arr[$key] is "baz" 
should be "baz"


Actual result:
--------------
Array
(
    [4001] => foo
    [4002] => bar
    [4003] => baz
)
PHP Notice:  Undefined index: 4001 in /home/manfred/poc.php on line 13
PHP Stack trace:
PHP   1. {main}() /home/manfred/poc.php:0
In foreach "$key => $val" key is "4001", val is "foo" but $arr[$key] is "" 
should be "foo"
PHP Notice:  Undefined index: 4002 in /home/manfred/poc.php on line 13
PHP Stack trace:
PHP   1. {main}() /home/manfred/poc.php:0
In foreach "$key => $val" key is "4002", val is "bar" but $arr[$key] is "" 
should be "bar"
PHP Notice:  Undefined index: 4003 in /home/manfred/poc.php on line 13
PHP Stack trace:
PHP   1. {main}() /home/manfred/poc.php:0
In foreach "$key => $val" key is "4003", val is "baz" but $arr[$key] is "" 
should be "baz"