反射不会在 JVM 调用的情况下返回相同的通用方法顺序（通过 Class::getMethods）。这在大约将 Clojure 函数（它们是 Callable 和 Runnable）提交到执行程序时最为明显。
(ns repro)
;;(set! *warn-on-reflection* true)
(defn repro
[]
(let [exec (java.util.concurrent.ForkJoinPool/commonPool)
work #(do 1)]
(deref (.submit ^Object exec work)))) ;; 故意进行反射
(defn -main []
;; dereffing a runnable returns nil, a callable can return a value, in this case an integer
(System/exit (or (repro) 0)))
nondeterministic ➜ while true; do clojure -m repro; echo $?; done
0
0
0
1
0
0
0
1
0
0
0
