Macro expansion of delay error

ser=> (require '[edu.arizona.fnparse [core :as c] [hound :as h]] :reload)
java.lang.RuntimeException: Can't embed object in code, maybe print-dup not defined: clojure.lang.Delay@65f0518c (hound.clj:445)
(let*
 [maker-var__35822__auto__
  (clojure.core/defn
   edu.arizona.fnparse.hound/validate
   "Creates a validating rule.\n  \n  A convenience function. Returns a new rule that\n  acts like the given `rule`, but also validates\n  `rule`'s products with the given predicate.\n  Basically just a shortcut for `for` and `when`."
   {:no-memoize? true,
    :success
    "When `rule` succeeds and its product fulfills `(pred product)`.",
    :product "`rule`'s product.",
    :consumes "What `rule` consumes."}
   [edu.arizona.fnparse.hound/pred
    edu.arizona.fnparse.hound/message
    edu.arizona.fnparse.hound/rule]
   {:pre
    #{(edu.arizona.fnparse.hound/rule? edu.arizona.fnparse.hound/rule)
      (clojure.core/ifn? edu.arizona.fnparse.hound/pred)
      (clojure.core/string? edu.arizona.fnparse.hound/message)}}
   (edu.arizona.fnparse.hound/for
    [edu.arizona.fnparse.hound/product
     edu.arizona.fnparse.hound/rule
     edu.arizona.fnparse.hound/_
     (edu.arizona.fnparse.hound/when
      (edu.arizona.fnparse.hound/pred
       edu.arizona.fnparse.hound/product)
      edu.arizona.fnparse.hound/message)]
    edu.arizona.fnparse.hound/product))]
 (clojure.core/alter-var-root
  maker-var__35822__auto__
  edu.arizona.fnparse.core/named-rule-maker
  :edu.arizona.fnparse.hound/Rule)
 (clojure.core/alter-meta!
  maker-var__35822__auto__
  clojure.core/update-in
  [:doc]
  edu.arizona.fnparse.core/rule-doc-str
  (clojure.core/meta maker-var__35822__auto__)
  "FnParse Hound rule-maker")
 (clojure.core/when-not
  (:no-memoize? (clojure.core/meta maker-var__35822__auto__))
  (clojure.core/alter-var-root
   maker-var__35822__auto__
   clojure.core/memoize))
 maker-var__35822__auto__)