--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 = "";
try {
    $var8 = mb_ereg_replace($var2,$var3,$var3,$var0);
    var_dump($var8);
} catch (\ValueError $e) {
    echo $e->getMessage() . \PHP_EOL;
}

?>
--EXPECT--
Option "e" is not supported