Description:
------------
$_SESSION should become an empty array after session_regenerate_id with true, but it doens't!

Test script:
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<?php
if(!isset($_SESSION)) session_start();

$_SESSION['a']='asd';

session_regenerate_id(TRUE);

echo var_dump($_SESSION).'<br/>';
?>


Expected result:
----------------
array(0) { } 

Actual result:
--------------
array(1) { ["a"]=>  string(3) "asd" }