project.clj

(defproject nrepl "0.1.0-SNAPSHOT"
  :dependencies [[org.clojure/clojurescript "1.10.236"]]
  :profiles {:dev {:dependencies [[com.cemerick/piggieback "0.2.2"]
                                  [org.clojure/tools.nrepl "0.2.10"]]
                 :repl-options {:nrepl-middleware [cemerick.piggieback/wrap-cljs-repl]}}})

repro.txt

$ lein repl
nREPL server started on port 64297 on host 127.0.0.1 - nrepl://127.0.0.1:64297
REPL-y 0.3.7, nREPL 0.2.10
Clojure 1.8.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_162-b12
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
    Exit: Control+D or (exit) or (quit)
 Results: Stored in vars *1, *2, *3, an exception in *e

user=> (require 'cljs.repl.node)
nil
user=> (cemerick.piggieback/cljs-repl (cljs.repl.node/repl-env))
To quit, type: :cljs/quit
nil
cljs.user=> 3
3
cljs.user=> ; wait 30 seconds

cljs.user=> 5
Exception in thread "nREPL-worker-1" java.lang.NullPointerException
{"type":"result","repl":"nREPL-worker-1","status":"success","value":"true"}	at cljs.repl.node$node_eval.invokeStatic(node.clj:67)
	at cljs.repl.node$node_eval.invoke(node.clj:61)
	at cljs.repl.node.NodeEnv._evaluate(node.clj:235)
	at user.Delegatingcljs_repl_node_NodeEnv._evaluate(form-init3746704708573989533.clj:122)
	at cljs.repl$evaluate_form.invokeStatic(repl.cljc:553)
	at cljs.repl$evaluate_form.invoke(repl.cljc:484)
	at cljs.repl$repl_STAR_.invokeStatic(repl.cljc:930)
	at cljs.repl$repl_STAR_.invoke(repl.cljc:839)
	at cemerick.piggieback$run_cljs_repl.invokeStatic(piggieback.clj:169)
	at cemerick.piggieback$run_cljs_repl.invoke(piggieback.clj:155)
	at clojure.lang.AFn.applyToHelper(AFn.java:171)
	at clojure.lang.AFn.applyTo(AFn.java:144)
	at clojure.core$apply.invokeStatic(core.clj:650)
	at clojure.core$apply.invoke(core.clj:641)
	at cemerick.piggieback$evaluate.invokeStatic(piggieback.clj:259)
	at cemerick.piggieback$evaluate.invoke(piggieback.clj:255)
	at clojure.lang.Var.invoke(Var.java:379)
	at cemerick.piggieback$wrap_cljs_repl$fn__1245$fn__1247$fn__1248.invoke(piggieback.clj:291)
	at cemerick.piggieback$enqueue$fn__1231.invoke(piggieback.clj:247)
	at clojure.tools.nrepl.middleware.interruptible_eval$run_next$fn__674.invoke(interruptible_eval.clj:159)
	at clojure.lang.AFn.run(AFn.java:22)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)