--TEST--
Bug #72164 (Null Pointer Dereference - mb_ereg_replace)
--SKIPIF--
<?php
extension_loaded('mbstring') or die('skip mbstring not available');
if (!function_exists('mb_ereg')) die('skip mbregex support not available');
?>
--FILE--
<?php
$var0 = "e";
$var2 = "";
$var3 = NULL;
$var8 = mb_ereg_replace($var2,$var3,$var3,$var0);
var_dump($var8);
?>
--EXPECTF--
Warning: mb_ereg_replace(): The 'e' option is no longer supported, use mb_ereg_replace_callback instead in %s on line %d
bool(false)