--TEST--
Bug #77367 (Negative size parameter in mb_split)
--SKIPIF--
<?php
if (!extension_loaded('mbstring')) die('skip mbstring extension not available');
if (!function_exists('mb_split')) die('skip mb_split() not available');
?>
--FILE--
<?php
mb_regex_encoding('UTF-8');
var_dump(mb_split("\\w", "\xfc"));
?>
--EXPECT--
bool(false)