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generalized newtype deriving not working with polymorphic component

I’d like generalized newtype deriving to work also with polymorphic components like in this example:

{-# LANGUAGE GeneralizedNewtypeDeriving, RankNTypes #-}

import Control.Monad.Cont

newtype PolyContT monad o = PolyContT (forall result. ContT result monad o)
                            deriving (Monad)

Would this be possible?

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Trac field Value
Version 6.10.1
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
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