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{-# LANGUAGE Rank2Types #-}
-- Tests subsumption for infix operators (in this case (.))
-- Broke GHC 6.4!
-- Now it breaks the impredicativity story
-- (id {a}) . (id {a}) :: a -> a
-- And (forall m. Monad m => m a) /~ IO a
module Main(main) where
foo :: (forall m. Monad m => m a) -> IO a
foo = id . id
main :: IO ()
main = foo (return ())
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