Description:
------------
none

Test script:
---------------
<?php
function & test($arg) {
    return $arg;
}

$arg = new Stdclass();
$arg->name = array();

test($arg)->name[1] = "xxxx";

var_dump($arg);

Expected result:
----------------
object(stdClass)#1 (1) {
  ["name"]=>
  array(1) {
    [1]=>
    string(4) "xxxx"
  }
}

Actual result:
--------------
object(stdClass)#1 (1) {
  ["name"]=>
  array(0) {
  }
}