rails console exits with a each_registered_block': undefined method each' for nil:NilClass (NoMethodError)` [rails 5.0.0.beta1.1]

[gnerkus]

Hello,

I have a rails 5.0.0.beta1.1 application rvm 1.26.11 / ruby 2.2.3p173 application installed locally. I've been able to run the rails server and rails generate commands without problems. Unfortunately, the rails console command exits with an error.

$ rails console returns the following:

/Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/railtie.rb:245:in 
`each_registered_block': undefined method `each' for nil:NilClass (NoMethodError)

This is my Gemfile:

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '>= 5.0.0.beta1.1', '< 5.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# Use Puma as the app server
gem 'puma'

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 3.0'

  gem 'rubocop'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

[prathamesh-sonpatki]

Can you please provide a sample application that reproduces the error?

[gnerkus]

I can outline the commands I ran until I received the error:

$ rvm gemset create rails-experiments
$ rvm gemset use rails-experiments
$ gem install rails --pre
$ rails new chatter --skip-spring
$ rails g controller rooms show
$ rails server

At this point, I added the rubocop gem. The next set of commands are detailed below:

$ bundle install
$ rails g model message content:text
$ rails console

The source files for the application:

message.rb

class Message < ApplicationRecord
end

rooms_controller.rb

#
class RoomsController < ApplicationController
  def show
    @message = Message.find(params[:id])
  end
end

routes.rb

Rails.application.routes.draw do
  root to: 'rooms#show'

  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html

  # Serve websocket cable requests in-process
  # mount ActionCable.server => '/cable'
end

[prathamesh-sonpatki]

@gnerkus Thanks for the steps. I was able to reproduce the issue and when I removed web-console gem from the Gemfile, rails console worked properly.

This issue is already reported on web-console tracker, I will move discussion there. rails/web-console#184

[prathamesh-sonpatki]

Closing this issue in favor of rails/web-console#184

[prathamesh-sonpatki]

@gnerkus This issue has been fixed by rails/web-console#185.

[gsamokovarov]

Folks, please update to 3.1.1. I have yanked the 3.1.0 release, so it can't be incidentally installed anymore.

[gnerkus]

I will update to 3.1.1. Thank you @prathamesh-sonpatki , @gsamokovarov .