Description:
------------
The test() function below triggers a bug in the ref counting of PHP7.
The issue was fixed in 5.6 and early 7.0, but the most recent 7.0 break this again.

See this in action at http://3v4l.org/0g0ID


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

function &test() {
    $var = array();
    $var[] =& $var;

    return $var;
};

$a = test();
$b = $a;
$b[0] = 123;

print_r($a);
print_r($b);

Expected result:
----------------
Array
(
    [0] => 123
)
Array
(
    [0] => 123
)

Actual result:
--------------
Array
(
    [0] => Array
 *RECURSION*
)
Array
(
    [0] => 123
)