Weird error:

gistfile1.txt

angular.module("angularQuiz").controller "RegisterModalController",

  class RegisterModalController

    prvScope = null #prototype private scope member
    prvModalInstance = null #prototype private modal instance
    prvAPIService = null #prototype private api service


    constructor: ($scope,$modalInstance, APIService) ->
      prvScope = $scope #set private scope member to injectable
      prvModalInstance = $modalInstance #set private modal instance member to injeactable
      prvAPIService = APIService #set prival api service member to injectable

      prvScope.register = @register #bind tryRegister
      prvScope.close = @close #bind close

      prvScope.data = {} #prototype data


    prvScope #return scope



    resolve = (email) -> #resolve modal interaction
      console.log 'closing'
      prvModalInstance.close
        email: email

      true #return



    reject = (reason) -> #reject modal interaction
      prvModalInstance.dismiss reason

      true #return






    register: () ->

      fail = prvScope.$on("angularFireAuth:error", (event,parameters)->
        fail()
      )

      success = prvScope.$on("angularFireAuth:login",(event,parameters) ->
        success()
        resolve(prvScope.email)
        true #return
      )

      console.log(prvScope)

      prvAPIService.register prvScope.data.email, prvScope.data.password #attempt to register

      true #return






    close: () ->

      resolve("user") #reject via user interaction

      true #return