2 tcfail001.hs:9:warning:
3 Duplicate class assertion `[(`A',
12 tcfail001.hs:9: Couldn't match the type
13 `PrelBase.[]' against `GHC.-> [t{-anj-}]'
14 Expected: `[a{-ani-}]'
15 Inferred: `[t{-anj-}] -> [t{-ank-}]'
16 In an equation for function `op':
21 Compilation had errors