sourcemaps not getting generated..

[danscrima]

I have a project with:
ruby '2.1.5'
gem 'rails', '4.2.6'
gem 'uglifier'
gem 'sprockets', github: 'rails/sprockets'
gem 'sprockets-rails', github: 'rails/sprockets-rails'
gem 'sass-rails', github: 'rails/sass-rails'
gem 'sprockets_uglifier_with_source_maps'

My development.rb file has the following params:
config.assets.debug = false
config.sass.debug_info = false
config.sass.line_comments = false
config.assets.uglifier = {output: {beautify: true, indent_level: 2}, compress: {angular: true}}
config.assets.js_compressor = :uglifier_with_source_maps

I actually clone your new_stack project and added some js files but still am not seeing any map files generated. Maybe I'm configuring something incorrectly? Thanks!

[jrjamespdx]

Having the same issue, no source maps are generated at all in production or dev environments:

ruby 2.2.4
rails 4.2.6

(all other gems are the same as @danscrima's setup)

Nothing generated at run time or when using rake assets:precompile

[AlexanderPavlenko]

rm -rf tmp/cache may help

[nhinze]

I was able to fix the issue by using:

gem 'uglifier', '~> 3.2'
gem 'execjs', '~> 2.7'