NullPointer when starting up rebel-readline-cljs

[benedekfazekas]

When I start up rebel-readline-cljs via leiningen from the checked out project -- as advised here https://github.com/bhauman/rebel-readline/tree/master/rebel-readline-cljs#clone-this-repo -- I get a nullpointer although the REPL starts up and seems the be functional.

Stack trace

java.lang.NullPointerException
	at java.util.regex.Matcher.getTextLength(Matcher.java:1283)
	at java.util.regex.Matcher.reset(Matcher.java:309)
	at java.util.regex.Matcher.<init>(Matcher.java:229)
	at java.util.regex.Pattern.matcher(Pattern.java:1093)
	at clojure.core$re_matcher.invokeStatic(core.clj:4674)
	at clojure.core$re_matches.invokeStatic(core.clj:4704)
	at clojure.core$re_matches.invoke(core.clj:4704)
	at cljs.util$compiled_by_version.invokeStatic(util.cljc:42)
	at cljs.util$compiled_by_version.invoke(util.cljc:39)
	at cljs.closure$compile_from_jar.invokeStatic(closure.clj:586)
	at cljs.closure$compile_from_jar.invoke(closure.clj:579)
	at cljs.closure$eval6300$fn__6301.invoke(closure.clj:619)
	at cljs.closure$eval6230$fn__6231$G__6219__6238.invoke(closure.clj:493)
	at cljs.closure$get_compiled_cljs.invokeStatic(closure.clj:705)
	at cljs.closure$get_compiled_cljs.invoke(closure.clj:700)
	at cljs.closure$cljs_dependencies.invokeStatic(closure.clj:772)
	at cljs.closure$cljs_dependencies.invoke(closure.clj:752)
	at cljs.closure$add_dependencies.invokeStatic(closure.clj:831)
	at cljs.closure$add_dependencies.doInvoke(closure.clj:824)
	at clojure.lang.RestFn.invoke(RestFn.java:423)
	at cljs.repl$load_namespace$fn__7387.invoke(repl.cljc:192)
	at cljs.repl$load_namespace.invokeStatic(repl.cljc:191)
	at cljs.repl$load_namespace.invoke(repl.cljc:179)
	at cljs.repl$load_dependencies.invokeStatic(repl.cljc:229)
	at cljs.repl$load_dependencies.invoke(repl.cljc:225)
	at cljs.repl$evaluate_form.invokeStatic(repl.cljc:512)
	at cljs.repl$evaluate_form.invoke(repl.cljc:452)
	at cljs.repl$repl_STAR_$fn__7613.invoke(repl.cljc:857)
	at cljs.repl$repl_STAR_$fn__7623$fn__7624.invoke(repl.cljc:896)
	at cljs.repl$repl_STAR_$fn__7623.invoke(repl.cljc:891)
	at cljs.compiler$with_core_cljs.invokeStatic(compiler.cljc:1271)
	at cljs.compiler$with_core_cljs.invoke(compiler.cljc:1260)
	at cljs.repl$repl_STAR_.invokeStatic(repl.cljc:888)
	at cljs.repl$repl_STAR_.invoke(repl.cljc:760)
	at rebel_readline.cljs.repl$eval9654$repl_STAR___9655.invoke(repl.clj:77)
	at rebel_readline.cljs.repl$repl.invokeStatic(repl.clj:86)
	at rebel_readline.cljs.repl$repl.doInvoke(repl.clj:85)
	at clojure.lang.RestFn.invoke(RestFn.java:410)
	at rebel_readline.cljs.main$_main.invokeStatic(main.clj:10)
	at rebel_readline.cljs.main$_main.doInvoke(main.clj:8)
	at clojure.lang.RestFn.invoke(RestFn.java:397)
	at clojure.lang.Var.invoke(Var.java:375)
	at user$eval15.invokeStatic(form-init929021329891832749.clj:1)
	at user$eval15.invoke(form-init929021329891832749.clj:1)
	at clojure.lang.Compiler.eval(Compiler.java:6927)
	at clojure.lang.Compiler.eval(Compiler.java:6917)
	at clojure.lang.Compiler.load(Compiler.java:7379)
	at clojure.lang.Compiler.loadFile(Compiler.java:7317)
	at clojure.main$load_script.invokeStatic(main.clj:275)
	at clojure.main$init_opt.invokeStatic(main.clj:277)
	at clojure.main$init_opt.invoke(main.clj:277)
	at clojure.main$initialize.invokeStatic(main.clj:308)
	at clojure.main$null_opt.invokeStatic(main.clj:342)
	at clojure.main$null_opt.invoke(main.clj:339)
	at clojure.main$main.invokeStatic(main.clj:421)
	at clojure.main$main.doInvoke(main.clj:384)
	at clojure.lang.RestFn.invoke(RestFn.java:421)
	at clojure.lang.Var.invoke(Var.java:383)
	at clojure.lang.AFn.applyToHelper(AFn.java:156)
	at clojure.lang.Var.applyTo(Var.java:700)
	at clojure.main.main(main.java:37)

Env OSX, Leiningen 2.9.1 getting the same with both java 11 and java8. With the former I had to mitigate some missing jaxb dependencies -- this is known issue with java11.