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@cdsmith
Created May 2, 2021 20:11
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class C t where
data D t
instance forall a. C (Maybe a) where
data D (Maybe a) where
D :: forall. a -> D (Maybe a)
Main.hs:6:18: error:
Not in scope: type variable ‘a’
Main.hs:6:32: error:
Not in scope: type variable ‘a’
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