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{-# LANGUAGE GADTs #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeInType #-}
module Bug where
import Data.Kind
data SameKind :: forall k. k -> k -> Type
data Foo :: forall a k (b :: k). SameKind a b -> Type where
MkFoo :: Foo sameKind
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