Using an instance of a type constructor class for an 2-ary type yields type-error in Haskell

Consider the following code.

> class FStarStar f where
>   fun :: f a b -> a -> b
>
> instance FStarStar (->)  where
>   fun f x = f x

There is no compile-error for the type class or instance involved. Running the program fun id 4, however, yields the following type-error in Haskell.

.curry/kics2/Curry_tplp.hs:389:50: error:
 Not in scope: type constructor or class ‘OP_Tuple3’
 Perhaps you meant one of these:
 ‘Curry_Prelude.OP_Tuple3’ (imported from Curry_Prelude),
 ‘Curry_Prelude.OP_Tuple2’ (imported from Curry_Prelude),
 ‘Curry_Prelude.OP_Tuple13’ (imported from Curry_Prelude)
 |
389 |   -> ConstStore -> OP_uscore_Dict_hash_FStarStar OP_Tuple3
 |                                                  ^^^^^^^^^

.curry/kics2/Curry_tplp.hs:395:59: error:
 Not in scope: type constructor or class ‘OP_Tuple3’
 Perhaps you meant one of these:
 ‘Curry_Prelude.OP_Tuple3’ (imported from Curry_Prelude),
 ‘Curry_Prelude.OP_Tuple2’ (imported from Curry_Prelude),
 ‘Curry_Prelude.OP_Tuple13’ (imported from Curry_Prelude)
 |
395 |   -> Cover -> ConstStore -> OP_uscore_Dict_hash_FStarStar OP_Tuple3
 |                                                           ^^^^^^^^^