Merge branch 'PHP-7.1'

* PHP-7.1:
  Added tests and NEWS entry Fixed bug #72598 (Reference is lost after array_slice())

Author: dstogov

Zend/tests/bug72598.phpt

@@ -0,0 +1,26 @@
+--TEST--
+Bug #72598 (Reference is lost after array_slice())
+--FILE--
+<?php
+function ref(&$ref) {
+	var_dump($ref);
+}
+
+new class {
+        function __construct() {
+                $args = [&$this];
+                for ($i = 0; $i < 2; $i++) {
+                        $a = array_slice($args, 0, 1);
+                        call_user_func_array('ref', $a);
+                }
+        }
+};
+?>
+--EXPECTF--
+Warning: Parameter 1 to ref() expected to be a reference, value given in %sbug72598.php on line 11
+object(class@anonymous)#1 (0) {
+}
+
+Warning: Parameter 1 to ref() expected to be a reference, value given in %sbug72598.php on line 11
+object(class@anonymous)#1 (0) {
+}

Zend/tests/bug72598_2.phpt

@@ -0,0 +1,27 @@
+--TEST--
+Bug #72598.2 (Reference is lost after array_slice())
+--FILE--
+<?php
+function ref(&$ref) {
+	var_dump($ref);
+	$ref = 1;
+}
+
+new class {
+        function __construct() {
+		$b = 0;
+                $args = [&$b];
+		unset($b);
+                for ($i = 0; $i < 2; $i++) {
+                        $a = array_slice($args, 0, 1);
+                        call_user_func_array('ref', $a);
+                }
+        }
+};
+?>
+--EXPECTF--
+Warning: Parameter 1 to ref() expected to be a reference, value given in %sbug72598_2.php on line 14
+int(0)
+
+Warning: Parameter 1 to ref() expected to be a reference, value given in %sbug72598_2.php on line 14
+int(0)