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{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies #-}
-- Strangely, this program does not elicit an error message
-- in GHC 5.03. I don't know why. It fails correctly in
-- 5.04
module ShouldFail where
class Eq ce => Collects e ce | ce -> e where
empty :: ce
empty = error("empty")
data Stupid = Stupid -- without equality
instance Collects Bool Stupid where
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