(ns typed.test
  (:require [clojure.core.typed :refer [ann check-ns tc-ignore]])
  (:import [clojure.lang IPersistentMap])
(tc-ignore
 (defrecord R [v]))

(ann nop [(IPersistentMap Any Any) -> (IPersistentMap Any Any)])
(defn nop [m] m)

(ann r R)
(def r (R. 1))

(nop r)

;; Running (check-ns) on this gives:
;; AssertionError Assert failed: 16: Wrong number of arguments passed to polymorphic type:
;; (All [a] (clojure.lang.IPersistentCollection a))[]
;; (= (:nbound t) (count types))  clojure.core.typed/instantiate-poly (type_rep.clj:477)