Fix compilation with GHC >= 9

Author: sjakobi

Data/HashMap/Internal.hs

@@ -301,8 +301,8 @@ instance (Data k, Data v, Eq k, Hashable k) => Data (HashMap k v) where
         1 -> k (z fromList)
         _ -> error "gunfold"
     dataTypeOf _   = hashMapDataType
-    dataCast1      = Data.gcast1
-    dataCast2      = Data.gcast2
+    dataCast1 f    = Data.gcast1 f
+    dataCast2 f    = Data.gcast2 f
 
 fromListConstr :: Constr
 fromListConstr = Data.mkConstr hashMapDataType "fromList" [] Data.Prefix

Data/HashSet/Internal.hs

@@ -233,7 +233,7 @@ instance (Data a, Eq a, Hashable a) => Data (HashSet a) where
         1 -> k (z fromList)
         _ -> error "gunfold"
     dataTypeOf _   = hashSetDataType
-    dataCast1      = Data.gcast1
+    dataCast1 f    = Data.gcast1 f
 
 instance Hashable1 HashSet where
     liftHashWithSalt h s = liftHashWithSalt2 h hashWithSalt s . asMap