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{-# LANGUAGE TypeFamilies, MultiParamTypeClasses, FlexibleInstances #-}
module ShouldFail where
import Data.Kind
class C7 a b where
data S7 b :: Type
instance C7 Char (a, Bool) where
data S7 (a, Bool) = S7_1
-- Fails because the arg to S7 should be the
-- same as that to C7
instance C7 Char (a, Int) where
data S7 (b, Int) = S7_2
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