| circular reference found
Array
(
    [0] => Array
        (
            [index] => a
            [waypoint] => Array
                (
                    [0] => 1
                    [1] => 2
                )
        )
    [1] => Array
        (
            [index] => c
            [waypoint] => Array
                (
                    [0] => 2
                    [1] => 4
                )
        )
    [2] => Array
        (
            [index] => d
            [waypoint] => Array
                (
                    [0] => 4
                    [1] => 5
                )
        )
    [3] => Array
        (
            [index] => e
            [waypoint] => Array
                (
                    [0] => 5
                    [1] => 9
                )
        )
    [4] => Array
        (
            [index] => i
            [waypoint] => Array
                (
                    [0] => 9
                    [1] => 10
                )
        )
    [5] => Array
        (
            [index] => j
            [waypoint] => Array
                (
                    [0] => 10
                    [1] => 11
                )
        )
    [6] => Array
        (
            [index] => k
            [waypoint] => Array
                (
                    [0] => 11
                    [1] => 12
                )
        )
    [7] => Array
        (
            [index] => n
            [waypoint] => Array
                (
                    [0] => 12
                    [1] => 10
                )
        )
)
Array
(
    [0] => Array
        (
            [index] => j
            [waypoint] => Array
                (
                    [0] => 10
                    [1] => 11
                )
        )
    [1] => Array
        (
            [index] => k
            [waypoint] => Array
                (
                    [0] => 11
                    [1] => 12
                )
        )
    [2] => Array
        (
            [index] => n
            [waypoint] => Array
                (
                    [0] => 12
                    [1] => 10
                )
        )
)
 |