module Program =

    let rec messageLoop (state:int) = async {
        return! someOther(state)
    } // <-- I need to indent this closing brace one more, then it compiles
    and someOther(state:int) = async {
        return! messageLoop(state)
    }

module Program =

    let a (state:int) = async {
        return state
    }
    let b (state:int) = async {
        return state
    }