Description:
------------
My unit tests began failing on PHP7 builds about a month ago, which I tracked down to an array_pop() call not actually removing the element from the array. This works fine on earlier PHP7 builds and all PHP5 versions, so I'm reporting it as a BC break, and a possible bug report.

I have a test case with output for various versions here: http://3v4l.org/mR874

PHP version information below:

$ php --version
PHP 7.0.0-dev (cli) (built: Jun  5 2015 08:25:20)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v3.0.0-dev, Copyright (c) 1998-2015 Zend Technologies



Test script:
---------------
<?php
$tokens     = array();
$conditions = array();
for ($i = 0; $i <= 10; $i++) {
    $tokens[$i] = $conditions;

    // First integer must be less than 8
    // and second must be 8, 9 or 10
    if ($i !== 0 && $i !== 8) {
        continue;
    }

    // Add condition and then pop off straight away.
    // Can also use array_shift() here.
    $conditions[$i] = true;
    $oldCondition   = array_pop($conditions);
}

// Conditions should be empty.
print_r($conditions);

Expected result:
----------------
Array
(
)

Actual result:
--------------
Array
(
    [8] => 1
)