[1mMain.hs:12.40-46:[1;31m error:[0m[1m
   • GeneralizedNewtypeDeriving for classes with associated data families is
     not implemented yet
   [1;34m|[0m
[1;34m12[0m [1;34m| [0mnewtype Age = Age Int deriving newtype [1;31mHasData[0m
   [1;34m|[0m                                        [1;31m^^^^^^^[0m
