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{-# OPTIONS_GHC -fno-warn-redundant-constraints #-}
{-# LANGUAGE RankNTypes #-}
module ShouldSucceed where
data Empty q = Empty (forall a. Ord a => q a)
q :: (Ord a) => [a]
q = []
e0, e1, e2 :: Empty []
e0 = Empty []
e1 = Empty ([] :: (Ord a) => [a])
e2 = Empty q
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