Merge branch 'PHP-7.0' into PHP-7.1

ext/mbstring/tests/bug72994.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Bug #72994 (mbc_to_code() out of bounds read)
+--SKIPIF--
+<?php
+if (!extension_loaded('mbstring')) die('skip mbstring extension not available');
+if (!function_exists('mbereg_replace')) die('skip mbereg_replace() not available');
+?>
+--FILE--
+<?php
+$var1 = mbereg_replace($var-232338951,NULL,NULL,NULL);
+var_dump($var1);
+?>
+===DONE===
+--EXPECTF--
+Notice: Undefined variable: var in %s on line %d
+string(0) ""
+===DONE===