rubocop replaces "end" with "nd" in certain situations

[stillhart]

Rubocop replaces end with nd when using rubocop-rails_config

I am not certain whether this bug even belongs into rubocop or into one of the related gems. This bug does not happen if use strictly rubocop without the gem rubocop-rails_config. In the end the decision to change the end to nd is made by rubocop, therefore I assume that it must be a bug in rubocop triggerd by an unusual configuration.

This is the most minimal amount of code to trigger this bug from my current point of view.

---

Expected behavior

Rubocop should not replace an end with nd in this minimal example:

# user_controller.rb
class UsersController < ApplicationController
  private
end

Actual behavior

Rubocop replaced the end with nd and therefore created invalid code.

# user_controller.rb
class UsersController < ApplicationController
  private
nd

Steps to reproduce the problem

Files

Clone the example repo: rubocop_bug or

# Gemfile
source "https://rubygems.org"
gem "rubocop"
gem "rubocop-rails_config"

# .rubocop.yml                                                                                                                                                                                                                             (master)
inherit_gem:
  rubocop-rails_config:
    - config/rails.yml

# user_controller.rb
class UsersController < ApplicationController
  private
end

To reproduce run:

• bundle install
• bundle exec rubocop -a --safe
• git diff
• check the git diff output to see if the end in the end of the file was replaced with nd

git diff

diff --git a/user_controller.rb b/user_controller.rb
--- a/user_controller.rb
+++ b/user_controller.rb
@@ -1,3 +1,3 @@
 class UsersController < ApplicationController
   private
-end
+nd

RuboCop version

bundle exec rubocop -V
0.86.0 (using Parser 2.7.1.4, rubocop-ast 0.1.0, running on ruby 2.7.1 x86_64-darwin19)

[stillhart]

I just saw that my bug report was fixed very fast. Thank you very much and I appreciate your work.