undefined local variable or method `byebug'

Question

I have the follwing error:

NameError (undefined local variable or method `byebug'

Code is

def  test
  t = ""
  byebug
end

--

RAILS_ENV=development gem list | grep bye

byebug (3.5.1)

then I run :

RAILS_ENV=development rails s

but it shows:

NameError (undefined local variable or method `byebug'

Do you have any idea why?

Thanks!

Is it in your Gemfile? – Frederick Cheung Oct 15 '14 at 21:06 — Frederick Cheung, Oct 15 '14 at 21:06

score 50 · Accepted Answer · answered Jun 29 '15 at 09:02

50

It seems you need to

require 'byebug'

I was in the same situation and require failed with 'cannot load such file' error but adding to the Gemfile worked.

answered Jun 29 '15 at 09:02

tuxayo

1,150
1
13
20

2

Rails 5 development on windows like `LoadError: cannot load such file -- byebug` and I just want to throw my computer out the window. Sorry for hijacking your answer. – Jay Killeen May 11 '17 at 07:36

score 2 · Answer 2 · answered Nov 20 '17 at 07:17

2

Make sure you haven't installed the gems with bundle install --without development option.

If that is the case just run bundle install --with development

answered Nov 20 '17 at 07:17

Calin Ciobanu

53
1
6

score 1 · Answer 3 · answered Mar 18 '22 at 12:40

Add byebug gem into development group

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

   # Access an IRB console on exception pages or by using <%= console %> in views
   gem 'web-console', '~> 2.0.0.beta4' 
end

Then run this command bundle install --with development

undefined local variable or method `byebug'

3 Answers3

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