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FDsFromGivens2.hs:15:15: error:
    • Couldn't match type ‘Char’ with ‘[a]’
        arising from a functional dependency between constraints:
          ‘C Char [a]’ arising from a use of ‘f’ at FDsFromGivens2.hs:15:15
          ‘C Char Char’
            arising from a pattern with constructor:
                           KCC :: C Char Char => () -> KCC,
                         in an equation for ‘bar’
            at FDsFromGivens2.hs:15:6-10
    • In the expression: f
      In an equation for ‘bar’: bar (KCC _) = f
    • Relevant bindings include
        bar :: KCC -> a -> a (bound at FDsFromGivens2.hs:15:1)