ExecJS::ProgramError: Unexpected token: punc (:) due to ember-data.js.map

[ur5us]

After upgrading to version 0.16.1 the build consistently fails, that is, I'm not able to run bundle exec rake assets:precompile successfully. Here's the stack trace which suggests that there is an issue with ember-data.js.map:

rake aborted!
ExecJS::ProgramError: Unexpected token: punc (:) (line: 1, col: 10, pos: 10)

Error
    at new JS_Parse_Error (<eval>:2359:10623)
    at js_error (<eval>:2359:10842)
    at croak (<eval>:2359:19086)
    at token_error (<eval>:2359:19223)
    at unexpected (<eval>:2359:19311)
    at semicolon (<eval>:2359:19784)
    at simple_statement (<eval>:2359:22580)
    at <eval>:2359:20274
    at <eval>:2359:19957
    at block_ (<eval>:2359:24599)
  (in /Users/ur5us/dev/haka_tours/tmp/ember-rails/ember-data.js.map)/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:34:in `rescue in block in eval'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:28:in `block in eval'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:78:in `block in lock'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:76:in `call'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:76:in `Locker'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:76:in `lock'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:27:in `eval'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:19:in `exec'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/uglifier-2.6.1/lib/uglifier.rb:200:in `run_uglifyjs'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/uglifier-2.6.1/lib/uglifier.rb:178:in `compile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/actionpack-3.2.21/lib/sprockets/compressors.rb:74:in `compress'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/actionpack-3.2.21/lib/sprockets/compressors.rb:74:in `compress'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/processing.rb:265:in `block in js_compressor='
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/processor.rb:29:in `call'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/processor.rb:29:in `evaluate'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/tilt-1.4.1/lib/tilt/template.rb:103:in `render'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/context.rb:193:in `block in evaluate'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/context.rb:190:in `each'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/context.rb:190:in `evaluate'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/bundled_asset.rb:24:in `initialize'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/base.rb:22:in `new'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/base.rb:22:in `build_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/index.rb:93:in `block in build_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/caching.rb:19:in `cache_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/index.rb:92:in `build_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:169:in `find_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/index.rb:14:in `find_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/static_compiler.rb:41:in `block in compile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:219:in `block in each_logical_path'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:206:in `block (2 levels) in each_file'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:196:in `each'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:196:in `each_entry'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:204:in `block in each_file'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:203:in `each'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:203:in `each_file'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:217:in `each_logical_path'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/static_compiler.rb:29:in `compile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:108:in `internal_precompile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:115:in `block (3 levels) in <top (required)>'
V8::Error: Unexpected token: punc (:)
at js_error (<eval>:2359:10842)
at croak (<eval>:2359:19086)
at token_error (<eval>:2359:19223)
at unexpected (<eval>:2359:19311)
at semicolon (<eval>:2359:19784)
at simple_statement (<eval>:2359:22580)
at <eval>:2359:20274
at <eval>:2359:19957
at block_ (<eval>:2359:24599)
at <eval>:2359:20663
at <eval>:2359:19957
at <eval>:2359:31968
at parse (<eval>:2360:152)
at <eval>:19:24
at <eval>:62:3
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:29:in `block in eval'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:78:in `block in lock'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:76:in `call'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:76:in `Locker'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:76:in `lock'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:27:in `eval'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/execjs-2.2.2/lib/execjs/ruby_racer_runtime.rb:19:in `exec'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/uglifier-2.6.1/lib/uglifier.rb:200:in `run_uglifyjs'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/uglifier-2.6.1/lib/uglifier.rb:178:in `compile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/actionpack-3.2.21/lib/sprockets/compressors.rb:74:in `compress'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/actionpack-3.2.21/lib/sprockets/compressors.rb:74:in `compress'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/processing.rb:265:in `block in js_compressor='
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/processor.rb:29:in `call'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/processor.rb:29:in `evaluate'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/tilt-1.4.1/lib/tilt/template.rb:103:in `render'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/context.rb:193:in `block in evaluate'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/context.rb:190:in `each'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/context.rb:190:in `evaluate'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/bundled_asset.rb:24:in `initialize'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/base.rb:22:in `new'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/base.rb:22:in `build_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/index.rb:93:in `block in build_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/caching.rb:19:in `cache_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/index.rb:92:in `build_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:169:in `find_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/index.rb:14:in `find_asset'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/static_compiler.rb:41:in `block in compile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:219:in `block in each_logical_path'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:206:in `block (2 levels) in each_file'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:196:in `each'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:196:in `each_entry'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:204:in `block in each_file'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:203:in `each'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:203:in `each_file'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/sprockets-2.2.3/lib/sprockets/base.rb:217:in `each_logical_path'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/sprockets_overrides/static_compiler.rb:29:in `compile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:108:in `internal_precompile'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:115:in `block (3 levels) in <top (required)>'
Tasks: TOP => assets:precompile:all
(See full trace by running task with --trace)
rake aborted!
Command failed with status (1): [/Users/ur5us/.rvm/rubies/ruby-2.1.5/bin/ru...]
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:24:in `ruby_rake_task'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:33:in `invoke_or_reboot_rake_task'
/Users/ur5us/.rvm/gems/ruby-2.1.5/gems/turbo-sprockets-rails3-0.3.14/lib/turbo-sprockets/tasks/assets.rake:50:in `block (2 levels) in <top (required)>'
/Users/ur5us/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
/Users/ur5us/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)

Even more annoyingly I can't just downgrade the gem via specifying version 0.16.0 in the Gemfile, at least not until I manually execute rm -rf tmp/ember-rails/.

Potentially related: #343 #357

[rgrinberg]

Are there any workarounds for this?

@ur5us what version of rails are you using?

[ur5us]

@rgrinberg I'm currently on 3.2.21. I think the problem might be that the asset pipeline tries to compile the map (TBC).

[tricknotes]

I changed the way to manage bundled files #448.
Then it stop copying ember-data.js.map to tmp/ember-rails.

I think it will fix this issue.
Could you try using ember-rails@0.16.4 after cache cleared.
If it doesn't please ping me.

[ur5us]

@tricknotes I've upgraded us to ember-rails@0.16.4 but the error still happens. It doesn't matter whether the file is copied or not. What matters is that it's in the Sprockets path which it seems to be. Thus, I'm using the following solution: /cc @rgrinberg

config/initializers/rack.rb:

Rack::Mime::MIME_TYPES.merge!({".map" => "text/plain"})

Further details here: jimsynz/faye-rails#15 (comment).

[ur5us]

@tricknotes I'm not entirely sure whether this is a problem with ember-rails, Rails (asset pipeline), Sprockets or even something else. I'm happy to close this issue but add a note to the docs.

[tjgfernandes]

thank you @tricknotes , adding MIME_TYPES worked for me, i'm using ember-rails@0.16.3

[dariusgm]

Fix: Remove this file from the asset pipeline, because it is not valid JavaScript. Add Stuff like this to your application.rb

module App
class Application < Rails::Application
...
file_ext_exclude = ['.map']
...
end
end

[caseyli]

Modifying the default rails definition for assets.precompile in production.rb did it for me:

config.assets.precompile = [ Proc.new{ |path| !File.extname(path).in?(['.js', '.css', '.map']) }, /(?:\/|\\|\A)application\.(css|js)$/]

I also had a separate manifest for my ember app so it looked like this:

config.assets.precompile = [ Proc.new{ |path| !File.extname(path).in?(['.js', '.css', '.map']) }, /(?:\/|\\|\A)application\.(css|js)$/, "ember_apps.js" ]

Found that answer here: http://stackoverflow.com/a/10099659

However, note that my asset precompilation took forever on Heroku and I noticed that things were being precompiled more than once. So there might be some issue with this workaround.

[hernanvicente]

I had the same problem when I've deployed to heroku. I've changed the syntax in my code from:

• sign_in() {
  to:
• sign_in: function() {

I'm actually a noob with Ember and I didn't want to change many things in my rails config. It's worth saying the ember code in my application is small.

Later I found the same solution here: http://stackoverflow.com/a/32534114/642496

My question: Is this a valid/good solution? Is there a negative impact on app performance or for me as developer? Thanks!

[baraka2000]

I hit this problem and have tried all the above work arounds with no luck. What's worse is I'm not even using ember data. Can ember-data be removed somehow??

[ur5us]

@hernanvicente It's the same. The former is ES6 syntax, the latter E3/5. It looks like it's related to the uglifier gem: http://stackoverflow.com/questions/30422437/execjsprogramerror-unexpected-token-punc-expected-punc-when-running/32534114#comment50344169_30422437

@baraka2000 It's hard to tell without further details but the following might help (still using my solution above and assuming your issue happens in dev mode?):

# make sure you stop your rails server, especially if you're using spring app preloader, then
bundle exec rake tmp:cache:clear

In your Gemfile, you might try the following:

gem 'ember-rails'
gem 'ember-data-source', require: false

Start your server and try again.