Description:
------------
Hello everyone! This bug reproduced only on PHP 7.1.0 with enabled Opcache (PHP 5.6 and PHP 7.0 not affected).
See test script. (Run twice or more for reproduce. First run begin not from cache and the script will work correctly).

Test script:
---------------
<?php
class Test {
	public function didIt() {
		$v = 2;
		$v = array($v);
		var_dump($v);
	}
}
(new Test())->didIt(); // RETURN array(1) { [0]=> array(1) { [0]=> *RECURSION* } }

$testFunction = function () {
	$v = 2;
	$v = array($v);
	var_dump($v);
};
$testFunction(); // RETURN array(1) { [0]=> array(1) { [0]=> *RECURSION* } }

$v = 2;
$v = array($v);
var_dump($v); // RETURN array(1) { [0]=> int(2) }