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{-# LANGUAGE Haskell2010 #-}
{-# OPTIONS_GHC -XDeriveDataTypeable #-}
-- #1935
-- See Note [Superclasses of derived instance] in GHC.Tc.Deriv
{-# OPTIONS -fno-warn-redundant-constraints #-}
module Foo where
import Data.Data
data Foo a = Foo
deriving (Data, Typeable)
data T a = MkT (S a) deriving( Ord )
instance Num a => Eq (T a)
data S a = S
instance Eq (S a)
instance Ord (S a)
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