Error when running rails console

[aar0nr]

Using:

• rails (4.2.5.1)
• web-console (3.1.0)

Running:

rails console

Outputs:

Running via Spring preloader in process 6529
~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/railtie.rb:245:in `each_registered_block': undefined method `each' for nil:NilClass (NoMethodError)
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/railtie.rb:224:in `run_console_blocks'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:472:in `block in run_console_blocks'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine/railties.rb:13:in `each'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine/railties.rb:13:in `each'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:472:in `run_console_blocks'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:438:in `load_console'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:58:in `initialize'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:9:in `new'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:9:in `start'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:68:in `console'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
  from ~/.gem/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in `<top (required)>'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `block in require'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in `load_dependency'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in `load'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in `block in load'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in `load_dependency'
  from ~/.gem/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in `load'
  from ~/.rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
  from ~/.rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
  from -e:1:in `<main>'

[gsamokovarov]

Can you give us a bit more context? Are you sure web-console is the cause of that error?

[aar0nr]

Yes, I created a brand new rails app, and when I update web-console to v3.1.0 I am unable to start a rails console session via bin/rails console. If I downgrade to v3.0.0 it works fine.

[joelmichael]

I am also sure it is the cause of the error.

[243, 252] in /Users/joel/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.5.1/lib/rails/railtie.rb
   243:       klass = self.class
   244:       while klass.respond_to?(type)
   245:         if klass == Object && type.to_s == 'console'
   246:           debugger
   247:         end
=> 248:         klass.public_send(type).each(&block)
   249:         klass = klass.superclass
   250:       end
   251:     end
   252:   end
(byebug) Object.method :console
#<Method: Class(Kernel)#console>
(byebug) Object.method(:console).source_location
["/Users/joel/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/web-console-3.1.0/lib/web_console/extensions.rb", 9]
(byebug) 

[kapso]

+1 getting the same issue

[prathamesh-sonpatki]

@gsamokovarov A similar issue was reported on rails/rails#23300. I created sample app - https://github.com/prathamesh-sonpatki/web-console-console-issue, please check.

[Eric-Guo]

+1, I can confirm, it's due to web-console instead of Rails master branch, if using web-console v3.0.0, such error not happen, no matter using puma 2.16.0 or rails master, so must a bug between v3.0.0 and v3.1.0

[Eric-Guo]

Confirm revert #182 will resolve this issue.

[gsamokovarov]

Holy moly. Thank you folks for the investigation. I have a fix and will release 3.1.1 ASAP.

[aar0nr]

Thank you @gsamokovarov , I appreciate the quick fix!