我正在尝试学习如何在轨道上使用ruby。我安装了一切，这很好，然后第二天我运行mackeeper后，当我输入rails -v时，我没有得到这个：
users-macbook:~ user$ rails -v
/usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:195:in `merge': can't convert String into Hash (TypeError)
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:195:in `initialize'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems.rb:364:in `new'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems.rb:364:in `configuration'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.2.4/lib/bundler/rubygems_integration.rb:25:in `configuration'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.2.4/lib/bundler/rubygems_integration.rb:5:in `initialize'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.2.4/lib/bundler/rubygems_integration.rb:380:in `new'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.2.4/lib/bundler/rubygems_integration.rb:380:in `'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.2.4/lib/bundler/rubygems_integration.rb:1:in `'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.2.4/lib/bundler.rb:7:in `'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from /usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rubygems-bundler-1.1.0/lib/rubygems-bundler/noexec.rb:20:in `'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /usr/local/rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from /usr/local/rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:9:in `'
不知道这意味着什么，也不知道如何解决，因为我对此很新？我有一个Macbook版本10.7.5。不确定mackeeper是否删除了任何文件或移动了什么。我卸载了所有东西并重新安装并仍然得到了这个。救命！我不能在课堂上向前走，直到我修好了！谢谢！