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{-# LANGUAGE RankNTypes #-}
-- This program tickled a bug in 5.02.2's forall-lifting
module ShouldCompile where
class Class x where
combinator' :: (forall y. Class y => y -> y) -> x -> x
combinator :: (forall y. Class y => y -> y)
-> (forall x. Class x => x -> x)
combinator f = combinator' f
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