运行后brew upgrade，或者其他更新了我的 gems/ruby 版本的东西，我的rake assets:precompile任务不再有效。
我收到此错误：
rake aborted!
stack level too deep
(in /Users/Jordan/Development/reejay/rails/reejay/app/assets/stylesheets/blog_player.css.scss)
/Users/Jordan/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:162
Tasks: TOP => assets:precompile:primary
rake aborted!
Command failed with status (1): [/usr/local/Cellar/ruby/1.9.3-p0/bin/ruby /...]
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/file_utils.rb:53:in `block in create_shell_runner'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/file_utils.rb:45:in `call'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/file_utils.rb:45:in `sh'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/file_utils_ext.rb:39:in `sh'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/file_utils.rb:80:in `ruby'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/file_utils_ext.rb:39:in `ruby'
/Users/Jordan/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.1/lib/sprockets/assets.rake:9:in `ruby_rake_task'
/Users/Jordan/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.1/lib/sprockets/assets.rake:17:in `invoke_or_reboot_rake_task'
/Users/Jordan/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.1/lib/sprockets/assets.rake:25:in `block (2 levels) in <top (required)>'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:205:in `call'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:205:in `block in execute'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:200:in `each'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:200:in `execute'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/task.rb:144:in `invoke'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:116:in `invoke_task'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:94:in `block (2 levels) in top_level'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:94:in `each'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:94:in `block in top_level'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:88:in `top_level'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:66:in `block in run'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'
/usr/local/Cellar/ruby/1.9.3-p0/lib/ruby/1.9.1/rake/application.rb:63:in `run'
/usr/local/bin/rake:32:in `<main>'
Tasks: TOP => assets:precompile
这是我的 Gemfile 的链接：http://www.pastie.org/3019470 http://www.pastie.org/3019470
其他 rake 任务（例如 db:migrate）继续按预期工作。这仅影响 asset:precompile 任务。
（重复我上面的评论，因为它似乎实际上是正确的答案。对于尚未使用它的任何人：rvm，rvm，rvm。学习它，喜欢它。）
堆栈跟踪引用了三个不同版本的 ruby（1.9.1、1.9.2 和 1.9.3），这很奇怪。我建议安装rvm http://beginrescueend.com/，创建一个干净的宝石集，然后再次尝试。
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