我一直在运行 Rails 3.2.3，一切运行良好。昨晚我做了一个包更新来更新我的 Gemfile 中的所有内容，这里是更新日志。
Updating git://github.com/stefants/negative-captcha.git
Fetching gem metadata from http://rubygems.org/......
Fetching gem metadata from http://rubygems.org/..
Using rake (0.9.2.2)
Using i18n (0.6.0)
Installing multi_json (1.3.4)
Using activesupport (3.2.3)
Using builder (3.0.0)
Using activemodel (3.2.3)
Using erubis (2.7.0)
Using journey (1.0.3)
Using rack (1.4.1)
Using rack-cache (1.2)
Using rack-test (0.6.1)
Using hike (1.2.1)
Using tilt (1.3.3)
Installing sprockets (2.1.3)
Using actionpack (3.2.3)
Using mime-types (1.18)
Using polyglot (0.3.3)
Using treetop (1.4.10)
Using mail (2.4.4)
Using actionmailer (3.2.3)
Using arel (3.0.2)
Installing tzinfo (0.3.33)
Using activerecord (3.2.3)
Using activeresource (3.2.3)
Installing addressable (2.2.8)
Using bundler (1.1.3)
Using rack-ssl (1.3.2)
Installing json (1.7.1) with native extensions
Using rdoc (3.12)
Using thor (0.14.6)
Using railties (3.2.3)
Using rails (3.2.3)
Using awesome_nested_fields (0.6.0)
Using xml-simple (1.1.1)
Using aws-s3 (0.6.2)
Using bcrypt-ruby (3.0.1)
Installing bson (1.6.2)
Installing bson_ext (1.6.2) with native extensions
Installing business_time (0.6.1)
Using cancan (1.6.7)
Installing carrierwave (0.6.2)
Installing mongo (1.6.2)
Installing mongoid (2.4.9)
Installing carrierwave-mongoid (0.2.0)
Using chronic (0.6.7)
Installing cocoon (1.0.20)
Installing coderay (1.0.6)
Installing coffee-script-source (1.3.1)
Installing execjs (1.3.2)
Using coffee-script (2.2.0)
Using coffee-rails (3.2.2)
Using coffeebeans (1.0.1)
Using datejs-rails (1.1.0)
Installing delayed_job (3.0.2)
Using delayed_job_mongoid (1.0.8)
Using orm_adapter (0.0.7)
Using warden (1.1.1)
Using devise (2.0.4)
Using ejs (1.0.0)
Using eventmachine (0.12.10)
Using em-websocket (0.3.6)
Installing excon (0.13.4)
Using faker (1.0.1)
Using multipart-post (1.1.5)
Using faraday (0.7.6)
Using ffi (1.0.11)
Using formatador (0.2.1)
Using net-ssh (2.3.0)
Using net-scp (1.0.4)
Using nokogiri (1.5.2)
Using ruby-hmac (0.4.0)
Using fog (1.3.1)
Using git (1.2.5)
Using term-ansicolor (1.0.7)
Installing grizzled-rails-logger (0.1.3)
Using rb-appscript (0.6.1)
Using growl_notify (0.0.3)
Installing guard (1.0.2)
Using guard-livereload (0.4.2)
Using hirb (0.6.2)
Using humane-rails (2.8.0.0.1.2)
Using jeweler (1.8.3)
Installing jquery-rails (2.0.2)
Installing jquery-ui-rails (0.4.0)
Using kaminari (0.13.0)
Using knockout-rails (1.0.1)
Using method_source (0.7.1)
Using momentjs-rails (1.5.0)
Using mongoid-data_table (1.3.3)
Using mongoid-eager-loading (0.3.1)
Using negative-captcha (0.1.0) from git://github.com/stefants/negative-captcha.git (at master)
Using nifty-generators (0.4.6)
Installing oauth (0.4.6)
Using oauth2 (0.5.2)
Using typhoeus (0.3.3)
Using panda (1.5.0)
Using slop (2.4.4)
Installing pry (0.9.9.4)
Using pry-rails (0.1.6)
Installing rails-backbone (0.7.2)
Using rb-fchange (0.0.5)
Installing rb-fsevent (0.9.1)
Using rb-inotify (0.8.8)
Using rest-client (1.6.7)
Installing sass (3.1.17)
Using sass-rails (3.2.5)
Installing simple_form (2.0.2)
Installing simple_oauth (0.1.7)
Using stripe (1.6.3)
Installing stylus-source (0.26.0)
Installing stylus (0.5.1)
Using uglifier (1.2.4)
Using underscore-rails (1.3.1)
Using webshims-rails (0.1)
Using wirble (0.1.3)
Using youtube_it (2.1.4)
Using zero-clipboard-rails (1.0.1)
Your bundle is updated! Use `bundle show [gemname]` to see where a bundled gem is installed.
然后我重新启动了服务器，现在我的 sass 文件中的某些 @import "file.css" 行会引发 Sprockets::FileNotFound 错误。
我对 Sprockets gem 做了一些研究，发现当前版本是 2.4.2。但是我的包更新将链轮更新到 2.1.3。这也是你的 Rails 应用程序的内容吗，Rails 使用的 sprocket 比 Github 落后几个版本？-- 我应该如何处理这个 Sprockets::FileNotFound 问题？
附录：我刚刚还看到 gemfile.lock 中的链轮是 2.1.2 版本。然而 bundle show sprockets 说 2.1.3。
谢谢