ring-middleware-cookies-bug.clj

(require 'ring.middleware.cookies)

(defn echo-handler
 ([request] request)
 ([request respond raise] (future (respond request)) nil))

(def handler
  (ring.middleware.cookies/wrap-cookies
    echo-handler
    {:encoder (fn [_] (throw (ex-info "encoder error" {})))}))

(handler {:cookies {:a 1}})
; => encoder error
(handler {:cookies {:a 1}} println println)
; => nil
; ... the encoder error should println here but it doesn't