本文介绍了安装 rubyracer 时出错，出现错误“无效的 gem:包已损坏"的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
尝试在 OSX 10.9 上安装 therubyracer 时，使用以下命令:
When trying to install therubyracer on OSX 10.9, with the command:
$ gem install therubyracer -v '0.12.0'
我得到错误:
ERROR: Error installing therubyracer:
invalid gem: package is corrupt, exception while verifying: undefined method `path2class' for #<Psych::ClassLoader:0x000001018cf210> (NoMethodError) in /Users/doved/.rvm/gems/ruby-2.0.0-p353/cache/therubyracer-0.12.0.gem
XCode 开发者工具已安装，我已尝试删除缓存文件，但仍然出现错误.
XCode developer tools are installed, and I've tried removing the cache file, but I still get the error.
推荐答案
删除/Users/doved/.rvm/gems/ruby-2.0.0-p353/cache/therubyracer-0.12.0.gem 并重新安装 gem.RubyGems 未正确下载文件，系统正确报告 gem 已损坏.
Delete /Users/doved/.rvm/gems/ruby-2.0.0-p353/cache/therubyracer-0.12.0.gem and install the gem again. RubyGems didn't download the file properly, and the system is properly reporting that the gem is corrupted.
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