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carlos@login: lein clean & lein cljsbuild auto production
[1] 11434
Compiling ClojureScript.
Compiling "resources/public/js/cljs/app.js" from ["src/cljs" "src/cljc" "src/frontend/src" "env/prod"]...
WARNING: ->ValidationError at line 68 is being replaced at line 80 file:/home/carlos/.m2/repository/prismatic/schema/0.4.0/schema-0.4.0.jar!/schema/utils.cljs
WARNING: ->NamedError at line 89 is being replaced at line 101 file:/home/carlos/.m2/repository/prismatic/schema/0.4.0/schema-0.4.0.jar!/schema/utils.cljs
WARNING: update already refers to: #'clojure.core/update in namespace: plumbing.core, being replaced by: #'plumbing.core/update
WARNING: update already refers to: cljs.core/update being replaced by: plumbing.core/update at line 53 file:/home/carlos/.m2/repository/prismatic/plumbing/0.4.0/plumbing-0.4.0.jar!/plumbing/core.cljs
WARNING: ->ValidationError at line 68 is being replaced at line 80 resources/public/js/cljs/production/schema/utils.cljs
WARNING: ->NamedError at line 89 is being replaced at line 101

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;; Problem

;; Event Handling in UIs. We only care about some of the events fired
;; by the user or IO and it is not always possible to handle them at
;; the point where we pick them up from the DOM.
;; Thus a messaging/piping infrastructure is need to take the events
;; from the place where they are interpreted from the DOM to the place
;; that handles them. Each application rolls it's own messaging
;; infrastructure, can we do any better?

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(ns import-names.core
  (:import (java.util Date)))

(def Date "Should this compile?")

(defn -main []
  (println Date))

;; Throws:

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java.lang.IllegalStateException
	at com.google.common.base.Preconditions.checkState(Preconditions.java:158)
	at com.google.javascript.jscomp.CollapseProperties.rewriteAliasProps(CollapseProperties.java:266)
	at com.google.javascript.jscomp.CollapseProperties.inlineGlobalAliasIfPossible(CollapseProperties.java:239)
	at com.google.javascript.jscomp.CollapseProperties.inlineAliases(CollapseProperties.java:181)
	at com.google.javascript.jscomp.CollapseProperties.process(CollapseProperties.java:116)
	at com.google.javascript.jscomp.PhaseOptimizer$NamedPass.process(PhaseOptimizer.java:285)
	at com.google.javascript.jscomp.PhaseOptimizer.process(PhaseOptimizer.java:217)
	at com.google.javascript.jscomp.Compiler.optimize(Compiler.java:1972)
	at com.google.javascript.jscomp.Compiler.compileInternal(Compiler.java:765)

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This Gist shows a potential bug in nashorn 1.8.0_40/1.8.0_45. It works properly in Java 9. It was logged with Review ID: JI-9020683.

After compiling a reduced version of core.cljs (the ClojureScript language) and a minimal test, 
V8 and Spidermonkey print 1 and 10 when the compiled script runs. Nashorn prints 1 and then throws 
the custom exception "Error: No protocol method IDeref defined for type :[object Object]"

The file compiled.js is a distilled version of the real compiled file that has the minimum code to 
fail. Any of the lines marked with // X solve the problem when deleted for 1.8.0_40. Deleting the
commented function solves the problem both for 1.8.0_40 and 1.8.0_45. Said function is not referenced
in the code at all.

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var goog = goog || {};

goog.typeOf = function(value) {
  var s = typeof value;
  if (s == "object") {
    if (value) {
      if (value instanceof Array) {
        return "array";
      } else {
        if (value instanceof Object) {

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The minimal error (below) disappears when test-919-generic-cas is deleted. It seems to be that the Protocol clashing comes when MyCustomAtom is used, not only defined. The error also disappears if `state` inside MyCustomAtom is changed to snail. Note that Volatile in cljs.core is also defined in terms of a state attribute.

Note that even though `compare-and-set!` calls `-deref` it raises no exceptions.

ERROR in (test-919-generic-cas) (Error:NaN:NaN)
testing CLJS-919, CAS should on custom atom types
expected: (== (clojure.core/deref a0) 20)
  actual: 
#<Error: No protocol method IDeref.-deref defined for type cljs.core-test/MyCustomAtom: [object Object]>

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(ns cljs.core-test
  (:refer-clojure :exclude [iter])
  (:require [cljs.test :refer-macros [deftest testing is]]))

(deftest test-atoms-and-volatile
  (let [v (volatile! 1)]
    (testing "Testing volatile"
      (is (volatile? v))
      (is (not (volatile? (atom 1))))
      (is (= 2 (vreset! v 2)))

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carlos@clojurescript: ./script/test-none
Analyzing file:/home/carlos/OpenSource/clojurescript/src/cljs/cljs/core.cljs
Compiling test/cljs/baz.cljs
WARNING: baz is a single segment namespace at line 1 test/cljs/baz.cljs
Compiling test/cljs/cljs/ns_test/bar.cljs
Compiling test/cljs/cljs/binding_test_other_ns.cljs
Compiling test/cljs/cljs/binding_test.cljs
Analyzing file:/home/carlos/OpenSource/clojurescript/src/cljs/cljs/test.cljs
Analyzing file:/home/carlos/OpenSource/clojurescript/src/cljs/clojure/string.cljs
Compiling test/cljs/cljs/keyword_other.cljs

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(ns notes.core
  (:import goog.History
           goog.history.EventType)
  (:require [reagent.core :as reagent :refer [atom]]
            [secretary.core :as secretary]
            [reagent.session :as session]
            [reagent-forms.core :refer [bind-fields]]
            [ajax.core :refer [POST]]
            [goog.events])
  (:require-macros [secretary.core :refer [defroute]]))