Description:
------------
If an array is casted to an object, its integer keys become inaccessible integer(!) key properties. They should be normal string key properties instead.

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

$arr = [1, 2, 4];
$obj = (object)$arr;

var_dump($obj);
var_dump($obj->{1}, $obj->{2}, $obj->{3});
var_dump($obj->{'1'}, $obj->{'2'}, $obj->{'3'});

?>

Expected result:
----------------
object(stdClass)#1 (3) {
  ["0"]=>
  int(1)
  ["1"]=>
  int(2)
  ["2"]=>
  int(4)
}
int(1)
int(2)
int(4)
int(1)
int(2)
int(4)

Actual result:
--------------
object(stdClass)#1 (3) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(4)
}

Notice: Undefined property: stdClass::$1 in - on line 7

Notice: Undefined property: stdClass::$2 in - on line 7

Notice: Undefined property: stdClass::$3 in - on line 7

NULL
NULL
NULL

Notice: Undefined property: stdClass::$1 in - on line 8

Notice: Undefined property: stdClass::$2 in - on line 8

Notice: Undefined property: stdClass::$3 in - on line 8

NULL
NULL
NULL