Error found:
in module Main
at tests/purs/failing/4408CyclicTail.purs:22:11 - 22:16 (line 22, column 11 - line 22, column 16)

  Hole 'help' has the inferred type
            
    Int -> K
            
  You could substitute the hole with one of these values:
                                                                      
    Main.aKyoko                 :: Int -> K                           
    Main.bShinobu               :: forall a. a -> K                   
    Main.cEsora                 :: forall a. a -> K                   
    Main.dYuka                  :: Int -> K                           
    Main.eShinobu               :: forall a. a -> K                   
    Main.fEsora                 :: forall a. a -> K                   
    Safe.Coerce.coerce          :: forall a b. Coercible a b => a -> b
    Unsafe.Coerce.unsafeCoerce  :: forall a b. a -> b                 
    Main.K                      :: Int -> K                           
                                                                      

in value declaration dYuka

See https://github.com/purescript/documentation/blob/master/errors/HoleInferredType.md for more information,
or to contribute content related to this error.