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Uncaught TypeError with Maybe recursion in Elm
-- This gives an 'Uncaught TypeError: three is not a function' at runtime, when
-- ran in the view function of a start-app app (probably irrelevant).
-- A better error message would certainly help.
one = Just <| three ()
two = one |> Maybe.map identity
three () = two |> Maybe.map (always ())
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