Debugging Rails 3.2 failing to precompile ember-rails 0.19

Question

Looking for a way to determine where in my code or in the ember-rails/ember-rails-source this error is coming from. Using rails 3.2 and the latest ember-rails 0.19. When I precompile my assets I get this failure:

Unexpected token: operator (!) (line: 16, col: 178179, pos: 178546)

Error
    at new JS_Parse_Error (<eval>:3096:22)
    at js_error (<eval>:3104:15)
    at croak (<eval>:3557:17)
    at token_error (<eval>:3564:17)
    at unexpected (<eval>:3570:17)
    at Object.semicolon [as 1] (<eval>:3590:51)
    at prog1 (<eval>:4133:29)
    at simple_statement (<eval>:3726:35)
    at <eval>:3634:35
    at block_ (<eval>:3822:32)
  (in /Users/sjustin/Development/my-app/app/assets/javascripts/application.js.coffee)

I've been able to destructively get the assets to precompile by removing the Ember Sprockets reference, #= require ember in my application.js.coffee :

#= require jquery
#= require jquery_ujs
#= require ember
#= require ember-data
#= require_self
#= require my-app

window.MyApp = Ember.Application.create()

But that breaks the app. If I run the app locally without precompiling I don't get any errors from Rails or the JavaScript console.

Answer 1

Which javascript runtime (eg therubyracer , execjs , nodejs ) are you using? Have you tried to switch it? I'd recommend using node (especially if you're running multiple apps on a single server), because you don't have to add a gem if node is installed.