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T15743d.hs:10:1: error:
• These kind and type variables: k
(c :: k)
(a :: Proxy c)
(b :: Proxy d)
(x :: SimilarKind a b)
are out of dependency order. Perhaps try this ordering:
k
(d :: k)
(c :: k)
(a :: Proxy c)
(b :: Proxy d)
(x :: SimilarKind a b)
NB: Implicitly declared variables come before others.
• In the data type declaration for ‘T2’
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