I don't program C or Go. I ran the logic and it works; I verified by running a modified version of this method on my computer.

    func below(n int) {
        for n--; n >= 0; n-- {
            fmt.Println(n)
        }
    }

I modified the type so I could punch in some sane integer, like 4. And this works.

    C:\git\bugfix66> go run .\bugfix66-2.go
    3
    2
    1
    0

Am I to assume that the bug is actually a type issue? Something to do with unsigned integers?

Wait. Oh. Ok. I get it. It does have to do with the type signature.