T21650_a.hs:25:8: error: [GHC-55287]
    • Unsaturated use of a representation-polymorphic newtype constructor.
      The first argument of ‘MkN’
      does not have a fixed runtime representation.
      Its type is:
        F Float :: TYPE (R Float)
    • In the expression: MkN
      In an equation for ‘foo1’: foo1 = MkN

T21650_a.hs:28:10: error: [GHC-55287]
    • Unsaturated use of a representation-polymorphic newtype constructor.
      The first argument of ‘MkN’
      does not have a fixed runtime representation.
      Its type is:
        F Double :: TYPE (R Double)
    • In the expression: MkN
      In an equation for ‘foo2’: foo2 _ = MkN