T5883.hs:1:1: Splicing declarations
    [d| data Unit = Unit
        
        instance Show Unit where
          show _ = ""
          {-# INLINE show #-} |]
  ======>
    T5883.hs:(7,4)-(12,4)
    data Unit = Unit
    instance Show Unit where
      {-# INLINE show #-}
      show _ = ""