user=> (def c (async/chan 1 (take 5)))
#'user/c
user=> (dotimes [i 10] (async/go (async/>! c i)))
nil
user=> (async/<!! c)
8
user=> (async/<!! c)
2
user=> (async/<!! c)
ClassCastException clojure.lang.PersistentVector cannot be cast to java.util.concurrent.locks.Lock  clojure.core.async.impl.channels.ManyToManyChannel (channels.clj:56)
user=> (async/<!! c)
ClassCastException clojure.lang.PersistentVector cannot be cast to java.util.concurrent.locks.Lock  clojure.core.async.impl.channels.ManyToManyChannel (channels.clj:56)
user=> (async/<!! c)
9
user=> (async/<!! c)
6
user=> (async/<!! c)
5
user=> (async/<!! c)
7