一切都很好，一旦我注销并登录回我的系统，我的系统上的Rails 3.1就什么都不起作用了。在每个应用程序上，它都会抛出相同的错误：
/home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/definition.rb:151:in `resolve': undefined local variable or method `index' for #<Bundler::Definition:0x97a48d4> (NameError)
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/definition.rb:90:in `specs'
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/definition.rb:135:in `specs_for'
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/definition.rb:124:in `requested_specs'
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/environment.rb:23:in `requested_specs'
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:11:in `setup'
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler.rb:110:in `setup'
from /home/nazar2/.rvm/gems/ruby-1.9.2-p290@rails3.1/gems/bundler-1.0.21/lib/bundler/setup.rb:7:in `<top (required)>'
from /home/nazar2/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `require'
from /home/nazar2/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `rescue in require'
from /home/nazar2/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from /home/backup/Hub/clients/orthomind/new/orthomind/config/boot.rb:6:in `<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in `require'
from <internal:lib/rubygems/custom_require>:29:in `require'
from script/rails:5:in `<main>'
我被卡住了，不知道问题出在哪里。
刚刚更新到bundler gem，一切都很好。
gem install bundler --pre
我认为Rails3.1 的先前bundler gem版本存在一些问题