Warning found:
in module Main
at tests/purs/warning/NewtypeInstance.purs:8:1 - 8:38 (line 8, column 1 - line 8, column 38)

  The derived newtype instance for
                  
    Data.Ord.Ord X
                  
  does not include a derived superclass instance for Data.Eq.Eq.

in value declaration ordX

See https://github.com/purescript/documentation/blob/master/errors/MissingNewtypeSuperclassInstance.md for more information,
or to contribute content related to this warning.