'rails generate controller' doesn't create any files

The command succeeds in running, and says that the files are created, however there are no files created, and running the command again says that they already exist.

after rails generate controller, at ~/Desktop/Projects/RailsTutorial:

  create  app/controllers/static_pages_controller.rb
  invoke  erb
  create    app/views/static_pages
  invoke  test_unit
  create    test/controllers/static_pages_controller_test.rb
  invoke  helper
  create    app/helpers/static_pages_helper.rb
  invoke    test_unit
  invoke  assets
  invoke    coffee
  create      app/assets/javascripts/static_pages.coffee
  invoke    scss
  create      app/assets/stylesheets/static_pages.scss

ls at ~/Desktop/Projects/RailsTutorial/app/controllers:

  application_controller.rb  concerns