要求Sinatra gem的錯誤

Question

我很難在我的本地設置Ubuntu Karmic 9.10上運行Sinatra。 當我需要'sinatra'時拋出的錯誤是：

NoMethodError: undefined method `[]' for nil:NilClass
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:891:in `compile'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:883:in `gsub'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:883:in `compile'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:856:in `route'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:838:in `get'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:1077
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:929:in `configure'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra/base.rb:1076
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/sinatra-1.0/lib/sinatra.rb:4
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from (irb):2
from :0

我試過了：

• 卸載/重新安裝Sinatra
• 更新所有寶石
• 確保所有依賴項都存在（機架）

有任何想法嗎？ 非常感謝您的時間和幫助！

Answer 1

這顯然是一個問題，在Linux上只有1.8-head。 它與regexp匹配有關。 如果您看一下代碼： path確實匹配/((:\\w+)|[\\*#{special_chars.join}])/ ，但是$2為nil ，即使它應該是String。

我建議暫時切換您的紅寶石版本。