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{-# LANGUAGE GADTs, KindSignatures #-}
module Bug85 where
-- explicitly stated non-trivial kind
data Foo :: (* -> *) -> * -> * where
Bar :: f x -> Foo f (f x)
-- Just kind * but explicitly written
data Baz :: * where
Baz' :: Baz
-- No kind signature written down at all
data Qux where
Quux :: Qux
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