Description:
------------
When re-assigning an argument in a function, func_get_args() doesn't return the original argument values anymore.

I found this while using Doctrine 2.3: https://github.com/doctrine/doctrine2/blob/b5e19dca182ee4c21dd26d14b2d707cd4ad4e95e/lib/Doctrine/ORM/QueryBuilder.php#L849 .

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

function test($a) {
    $a = "overridden";
    var_dump(func_get_args());
}

test("original");

Expected result:
----------------
array(1) {
  [0]=>
  string(8) "original"
}

Actual result:
--------------
array(1) {
  [0]=>
  string(10) "overridden"
}