constant-test in 'manifold.deferred/let-flow'

[NeilMenne]

In this particular case, it has to do with async ring middleware, but it looks kinda like:

(defn wrap-middlewarez
  [handler]
  (fn [request]
    (let-flow [response (handler request)]
      (cond (exceptional? response) {:status 500 :body "my b"}
            (empty? response)       {:status 204}
            :else                   {:body response}))))

I get an error like: constant-test: Test expression is always logical true or always logical false: :else in form (if :else {:body response} nil).