RoR — NoMethodError: private method `open' called for Gem::Package:Class

Question

Hey does anyone know what this error message means? I installed ruby from source then proceeded to install rubygems, and then installed rails via gem install rails

After creating a new project, I did a bundle install and got this error:

mark@mark-laptop:~/guide/first_app$ sudo bundle install Fetching source index for https://rubygems.org/

NoMethodError: private method open' called for Gem::Package:Class An error occured while installing rake (0.9.2.2), and Bundler cannot continue. Make sure that open' called for Gem::Package:Class An error occured while installing rake (0.9.2.2), and Bundler cannot continue. Make sure that gem install rake -v '0.9.2.2'` succeeds before bundling.

I did that command ( gem install rake -v '0.9.2.2' ) and it worked fine.. I'm rather confused

Answer 1

Try gem install bundler to install/update bundler after installing/updating rubygems.

It worked for me when I had your problem.

Answer 2

This appears to be a bug in the master branch of rubygems from GitHub. If you grab an archive of 1.8.24 from http://rubygems.org/pages/download instead, everything works fine.

Answer 3

I have rubygems 2.0.3 and I get the same error. I deleted gemfile.lock file in the project. Only change I got in error is From Make sure that gem install rake -v '0.9.2.2' succeeds before bundling. Changed to Make sure that gem install rake -v '10.0.3' succeeds before bundling. The new gem install rake also worked for me.

Answer 4

It's possible that you are using different ruby versions and gems when running commands with and without sudo. You can try running

sudo ruby -v

and

ruby -v

In addition you can check for different gem paths

gem env

and

sudo gem env

Answer 5

1. gem update --system
2. gem install bundler