My busted use of wrap-flash

core.clj

(ns one-up.core
  (:use [ring.adapter.jetty :only (run-jetty)]
        [ring.middleware.session :only (wrap-session)]
        [ring.middleware.flash :only (wrap-flash)]
        [ring.middleware.file :only (wrap-file)]
        [ring.middleware.file-info :only (wrap-file-info)]
        [ring.middleware.reload :only (wrap-reload)]
        [ring.middleware.stacktrace :only (wrap-stacktrace)]
        [one-up.view :only (main-routes)]
        one-up.middleware))

(def production?
     (= "production" (get (System/getenv) "APP_ENV")))

(def development?
     (not production?))

(def app
     (-> #'main-routes
         (wrap-session)
         (wrap-flash)
         (wrap-file "public")
         (wrap-file-info)
         ; (wrap-request-logging)
         (wrap-if development? wrap-reload '[one-up.core one-up.data one-up.middleware one-up.view])
         (wrap-bounce-favicon)
         (wrap-exception-logging)
         (wrap-if production? wrap-failsafe)
         (wrap-if development? wrap-stacktrace)))

(defn boot []
  (let [port (Integer/parseInt (get (System/getenv) "PORT" "8080"))]
    (run-jetty #'app {:join? false :port port})))

Solution found: need to flip order of wrap-session and wrap-flash