最近经常 unexpected end of file 换成 rubygems 的源就 ok
➜ fo-web git:(master) gem install bullet -V
GET http://ruby.taobao.org/latest_specs.4.8.gz
200 OK
GET http://ruby.taobao.org/specs.4.8.gz
200 OK
ERROR: While executing gem ... (Zlib::GzipFile::Error)
unexpected end of file