hhvm/hphp/test/quick/compact.php.expect

Array
(
    [b] => Array
        (
            [0] => bar
            [1] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => foo
                )

        )

    [a] => Array
        (
            [0] => 1
            [1] => 2
            [2] => foo
        )

    [c] => Array
        (
            [0] => bar
            [1] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => foo
                )

        )

    [d] => Array
        (
            [0] => Array
                (
                    [0] => bar
                    [1] => Array
                        (
                            [0] => 1
                            [1] => 2
                            [2] => foo
                        )

                )

        )

    [e] => 1
)