Description:
------------
When compact() is used with references, those references are maintained in the new array in php7 and not in 5.6

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

$foo = 45;
$foo_reference =& $foo;

$array = compact('foo_reference');

print_r($array);

$foo = 50;

print_r($array);

Expected result:
----------------
PHP 5.6.17
----------
    Array
    (
        [foo_reference] => 45
    )
    Array
    (
        [foo_reference] => 45
    )


Actual result:
--------------
PHP 7.0.3
---------
    Array
    (
        [foo_reference] => 45
    )
    Array
    (
        [foo_reference] => 50
    )