eze@eze:~/Appp$ rbenv local
rbenv: no local version configured for this directory
eze@eze:~/Appp$ rbenv global
2.2.1
eze@eze:~/Appp$ rbenv versions
* 2.2.1 (set by /home/eze/.rbenv/version)
I recently uninstalled and reinstalled ruby with rbenv, but when I installed again I realized that everything worked except from the rails console, this is the output error
/home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- set (LoadError) from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/index.rb:1:in
`<top (required)>' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/source/rubygems.rb:204:in `fetch_specs' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/source/rubygems.rb:66:in `specs' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/lazy_specification.rb:53:in
`__materialize__' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/spec_set.rb:88:in `block in materialize' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/spec_set.rb:85:in `map!' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/spec_set.rb:85:in
`materialize' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/definition.rb:133:in `specs' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/definition.rb:178:in `specs_for' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/definition.rb:167:in
`requested_specs' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/environment.rb:18:in `requested_specs' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/runtime.rb:13:in `setup' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler.rb:120:in
`setup' from /var/lib/gems/1.9.1/gems/bundler-1.6.5/lib/bundler/setup.rb:7:in `
<top (required)>' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `require' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in
`require' from /var/lib/gems/1.9.1/gems/spring-1.3.3/lib/spring/commands.rb:33:in `
<module:Spring>' from /var/lib/gems/1.9.1/gems/spring-1.3.3/lib/spring/commands.rb:4:in `
<top (required)>' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' from /var/lib/gems/1.9.1/gems/spring-1.3.3/lib/spring/server.rb:9:in
`
<top (required)>' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `require' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require' from /home/eze/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in
`require'
Solution:
Do gem update --system. It appears that you hadn't installed an updated version of rubygems to go with your new version of Ruby.
Sorry I took so long to get to a solution that worked for you, it seems more obvious now. :)
Original Answer:
Have you made sure that the global (or possibly local, if you have one set) Ruby version is set correctly with rbenv? Have you tried doing rbenv rehash.
It looks like you're missing the Set module in the Ruby standard library for some reason- but since I believe it is part of the standard library and should be there unless your Ruby installation is somehow broken, it makes me wonder if the shims installed by rbenv might be pointing at the wrong place. rbenv rehash should fix that problem, I believe, if that is the cause.
Otherwise, is there any more information about your environment you can give? Such as the output of
rbenv local
rbenv global
rbenv versions
Also, how are you starting the rails console?
Are you doing rails console in your project's directory?
If you start irb and then do require 'set', does it work, or does it throw an error?