
tcfail175.hs:11:1:
    Couldn't match type `a' with `String -> String -> String'
      `a' is a rigid type variable bound by
          the type signature for evalRHS :: Int -> a at tcfail175.hs:11:1
    The equation(s) for `evalRHS' have three arguments,
    but its type `Int -> a' has only one
