Stacktrace using cljs.jar and clojurescript quickstart

stacktrace.txt

~/Sites/nowthis-2 =>   $ rlwrap ./start.sh
Compiling client js ...
Waiting for browser to connect ...
Watch compilation log available at: out/watch.log
To quit, type: :cljs/quit
cljs.user=> (require '[sb.core :as sb] :reload)
nil
[Acljs.user=(require '[sb.core :as sb] :reload)
nil
cljs.user=> (+ 1 1)
2
cljs.user=> Exception in thread "Thread-575" Exception in thread "Thread-576" java.lang.NullPointerException
        at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:26)
        at cljs.repl.server$read_request.invoke(server.clj:95)
        at cljs.repl.server$handle_connection.invoke(server.clj:153)
        at cljs.repl.server$server_loop$fn__4443.invoke(server.clj:164)
        at clojure.core$binding_conveyor_fn$fn__4441.invoke(core.clj:1914)