pony AST error message for syntax pass on object literal

gistfile1.txt

(class:scope
  (id $1$0)
  x
  ref
  (provides (nominal x (id Getter) x x x))
  (members
    (fvar (id d) (nominal (id $0) (id Bool) x val x x) x)
    (fvar (id c) (nominal (id $0) (id Bool) x val x x) x)
    (fvar (id b) (nominal (id $0) (id Bool) x val x x) x)
    (fvar (id a) (nominal (id $0) (id Bool) x val x x) x)
    (fun:scope
      box
      (id get)
      x
      x
      (nominal x (id U64) x x x)
      x
      (seq
        (call
          (.
            (call
              (.
                (call
                  (. (reference (id a)) (id op_and))
                  (positionalargs (seq (reference (id b))))
                  x
                  x
                )
                (id op_or)
              )
              (positionalargs (seq (reference (id c))))
              x
              x
            )
            (id op_and)
          )
          (positionalargs (seq (reference (id d))))
          x
          x
        )
      )
      x
      x
    )
    (new:scope
      x
      (id create)
      x
      (params
        (param (id $1$1) (nominal (id $0) (id Bool) x val x x) x)
        (param (id $1$2) (nominal (id $0) (id Bool) x val x x) x)
        (param (id $1$3) (nominal (id $0) (id Bool) x val x x) x)
        (param (id $1$4) (nominal (id $0) (id Bool) x val x x) x)
      )
      (nominal x (id $1$0) x x ^)
      x
      (seq
        true
        (= (reference (id a)) (consume x (reference (id $1$1))))
        (= (reference (id b)) (consume x (reference (id $1$2))))
        (= (reference (id c)) (consume x (reference (id $1$3))))
        (= (reference (id d)) (consume x (reference (id $1$4))))
      )
      x
      x
    )
  )
  x
  x
)

Error:
/home/mwahl/dev/pony/array_bug/test.pony:99:9: class constructor cannot specify return type
        fun get(): U64 =>
        ^

object_ast

(object
  x
  (provides (nominal (id $1) (id Getter) x ref x x))
  (members
    (fun:scope
      x
      (id get)
      x
      x
      (nominal x (id U64) x x x)
      x
      (seq
        (and
          (or
            (and (reference (id a)) (reference (id b)) x)
            (reference (id c))
            x
          )
          (reference (id d))
          x
        )
      )
      x
      x
    )
  )
)