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{-# OPTIONS_GHC -fno-warn-redundant-constraints #-}
{-# LANGUAGE FunctionalDependencies #-} {-# LANGUAGE FlexibleInstances #-}
module T7171a where
import Data.ByteString as B
import Data.Word
class Foo a b | a -> b
class (Foo a b) => Bar a b | a -> b
instance Foo [a] a
instance Bar [a] a
instance Foo ByteString Word8
instance Bar ByteString Word8
test :: Bar full item => full -> full
test inp = inp
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