[nhc-bugs] deriving Ix

The program import Ix newtype Name = Name Int deriving (Eq, Ord, Ix) main = print 42 gives me Error when renaming:: Identifier Ix._tupleRange used at 4:33 is not defined. Identifier Ix.inRange used at 4:33 is not defined. Identifier Ix.range used at 4:33 is not defined. Type class Ix.Ix used at 4:33 is not defined. Identifier Ix._tupleIndex used at 4:33 is not defined. Identifier Ix.index used at 4:33 is not defined. which IMO contradicts the definition of the Standard Libraries. Manuel