--TEST--
Bug #67167: object with VALIDATE_BOOLEAN and NULL_ON_FAILURE
--SKIPIF--
<?php if (!extension_loaded("filter")) die("skip"); ?>
--FILE--
<?php
var_dump(filter_var(
    new \StdClass(),
    FILTER_VALIDATE_BOOLEAN,
    FILTER_NULL_ON_FAILURE
));
?>
--EXPECT--
NULL