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{-# LANGUAGE ImplicitParams, RankNTypes #-}
-- Rank-2 types with implicit parameters.
-- GHC 5.02 erroneously rejected this
module ShouldCompile where
f :: ((?param :: a) => b) -> a -> b
f foo a = let ?param = a in foo
g :: (?param :: a) => a
g = ?param
h :: a -> a
h = f g
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