tcfail123.hs:11:9: error:
    • Couldn't match a lifted type with an unlifted type
      When matching types
        p0 :: *
        GHC.Prim.Int# :: TYPE 'GHC.Types.IntRep
    • In the first argument of ‘f’, namely ‘3#’
      In the expression: f 3#
      In an equation for ‘h’: h v = f 3#