title: Cannot run `bundle install`
body: <p>So the other day I ran into an extreme hard disk issue and had to manually delete my <code>.gem</code> folder. I attempted to rebuild the gems for my apps by going into my project folders to run <code>bundle install</code> ... I am unfortunately running into this error:</p>
  
  <pre><code>/home/xxx/.rvm/rubies/ruby-2.2.2/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- bundler (LoadError)
      from /home/xxx/.rvm/rubies/ruby-2.2.2/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
      from /usr/bin/bundle:7:in `&lt;main&gt;'
  </code></pre>
  
  <p>By the way, line 54 of kernel_require.rb is <code>return gem_original_require(path)</code>:</p>
  
  <pre><code>if Gem::Specification.unresolved_deps.empty? then
    RUBYGEMS_ACTIVATION_MONITOR.exit
    return gem_original_require(path)
  end
  </code></pre>