Using os module functions causes root fiber to panic

[eko234]

Hi, I'm trying to write a little web app on circlet and I'm trying to spawn some processes like this one when I receive a request to certain endpoint.

(defn getls
  "gets ls from bin dir" []
  (def procc (os/spawn ["ls"] :p {:in :pipe :out :pipe :err :pipe}))
  (pp :waiting_for_proc)
  (pp (:wait procc))
  [(:read (procc :out) :all)
   (:read (procc :err) :all)])

the first time I get the request nothing happens, but when I try to request again I got an error that says: current fiber is already waiting for event

could you explain me why this happens? is this a bug or maybe I'm not familiar enough with how things work in Janet or with Circlet