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-- This one risked building a recursive dictionary rather than
-- failing, in GHC before 5.03. Actually, 5.02 managed it ok,
-- but I think more by luck than good judgement.
module ShouldFail where
class S a
class S a => C a where { opc :: a -> a }
class S b => D b where { opd :: b -> b }
instance C Int where
opc = opd
instance D Int where
opd = opc
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