Spawning subrepl using main/repl not working.

[maacl]

Expected behavior

At cider repl:

(defn foo
  [n]
  (cond (> n 40) (+ n 20)
        (> n 20) (- (first n) 20)
        :else 0))

(require '[clojure.main :as main])
(main/repl :caught (fn [_] (println "Broken! HaHa!")))

(foo 24)
=> Broken! HaHa!

Actual behavior

(defn foo
  [n]
  (cond (> n 40) (+ n 20)
        (> n 20) (- (first n) 20)
        :else 0))

(require '[clojure.main :as main])
(main/repl :caught (fn [_] (println "Broken! HaHa!")))

Jumps to minibuffer with a stdin: prompt.

Steps to reproduce the problem

See above.

Environment & Version information

CIDER version information

CIDER 0.15.0-snapshot, nREPL 0.2.12
Clojure 1.8.0, Java 1.8.0_131

Lein/Boot version

N/A

Emacs version

Emacs 26.0.50

Operating system

Ubuntu 17.04

[TimoFreiberg]

Seems like an nREPL problem (if you can call it a problem).
Immediately after printing the prompt, nREPL asks for stdin input (the last message in the following snippet).
nREPL asks for stdin because the implementation of clojure.main/repl reads from *in*.
So you're right @bbatsov , this seems related to the follow-up issue of 2317

At the moment I would say "not a bug", but maybe the stdin handling of nREPL could be improved :).

nREPL messages:

(-->
  id                 "11"
  op                 "eval"
  session            "3e6c03a1-b531-46cc-bd36-df172ec81f9c"
  time-stamp         "2018-06-27 20:02:22.592855479"
  code               "(main/repl :caught (fn [_] (println \"Broken! HaHa!\")))"
  column             9
  content-type       "true"
  file               "*cider-repl filter(clj)*"
  line               55
  ns                 "filter.core"
  pprint             "true"
  pprint-fn          "clojure.pprint/pprint"
  print-right-margin 80
)
(<--
  id         "11"
  session    "3e6c03a1-b531-46cc-bd36-df172ec81f9c"
  time-stamp "2018-06-27 20:02:22.611202068"
  out        "filter.core=> "
)
(<--
  id         "11"
  session    "3e6c03a1-b531-46cc-bd36-df172ec81f9c"
  time-stamp "2018-06-27 20:02:22.612512035"
  status     ("need-input")
)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution and understanding!

[bbatsov]

I'll close this, as it has to be solved in nREPL. See nrepl/nrepl#45