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T17963.hs:15:23: error: [GHC-25897]
    • Couldn't match kind ‘rep’ with ‘GHC.Types.LiftedRep’
      When matching kinds
        k0 :: *
        ob :: TYPE rep
      ‘rep’ is a rigid type variable bound by
        the class declaration for ‘Category'’
        at T17963.hs:14:18-35
    • In the first argument of ‘cat’, namely ‘a’
      In the type signature: id' :: forall a. cat a a
      In the class declaration for ‘Category'’