java.lang.ClassCastException: java.lang.String cannot be cast to java.util.concurrent.Future

[tiensonqin]

java.lang.ClassCastException: java.lang.String cannot be cast to java.util.concurrent.Future
 at clojure.core$deref_future.invoke (core.clj:2180)
    clojure.core$deref.invoke (core.clj:2201)
    cider.nrepl.middleware.util.cljs$grab_cljs_env.invoke (cljs.clj:21)
    cider.nrepl.middleware.info$info.invoke (info.clj:129)
    cider.nrepl.middleware.info$eldoc.invoke (info.clj:240)
    cider.nrepl.middleware.info$eldoc_reply.invoke (info.clj:246)
    cider.nrepl.middleware.info$wrap_info$fn__1981.invoke (info.clj:261)
    clojure.tools.nrepl.middleware$wrap_conj_descriptor$fn__7604.invoke (middleware.clj:17)
    cider.nrepl.middleware.classpath$wrap_classpath$fn__781.invoke (classpath.clj:25)
    clojure.tools.nrepl.middleware$wrap_conj_descriptor$fn__7604.invoke (middleware.clj:17)
    clojure.tools.nrepl.server$handle_STAR_.invoke (server.clj:19)
    clojure.tools.nrepl.server$handle$fn__7914.invoke (server.clj:28)
    clojure.core$binding_conveyor_fn$fn__4145.invoke (core.clj:1910)
    clojure.lang.AFn.call (AFn.java:18)
    java.util.concurrent.FutureTask.run (FutureTask.java:262)
    java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1145)
    java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:615)
    java.lang.Thread.run (Thread.java:744)

[bbatsov]

Any steps to reproduce this?

[tiensonqin]

I think it's something connected to vinyasa.
Here is my profiles.clj: https://gist.github.com/b2dd81d5d9e557b44f99,
after i commented out those two lines:
;; [vinyasa.lein lein]
;; [vinyasa.reimport reimport],
the exception is gone.