In cljs, clojure.core.async/random-array's shuffle was incorrect, leading it to always return [1 0] for arg n=2. This breaks the promise that alts! is non-deterministic w.r.t. op selection by always trying the second element first. Additionally, the first op is never chosen first for alts! of any size N>1.
Use goog.array.shuffle to do the shuffle instead. (This API is also used by cljs.core/shuffle)
New implementation passes tests and behaves better:
fixed in 14bed8383516ab119c3fc51c2882112000eb5664 , 0.4.500
Closing, wasn't closed on release by accident