KohanaPHP » Kohana v3.x » ORM

「$this->_valid」expression should be run before 「$this->_changed」or missing validation like 「password」 matchs 「password_confirm」in method update()

funciton action_change_password(){
    $_POST["password"] = "12345678";
    $_POST["password_confirm"] = "12345678";
    $user = ORM::factory("user", 1);
    try
    {
        $user->update_user($_POST, array('password'));
        echo "update success";
    }
    catch (ORM_Validation_Exception $exc)
    {
        print_r($exc->errors(''));
    }
    exit;
}

It's still "update success" when password don't match passowrd_confirm after once match success.