ruby - 需要 Sinatra gem 时出错

Question

我很难让 Sinatra 在我的本地设置 Ubuntu Karmic 9.10 上运行。当我需要'sinatra'时抛出的错误是:

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

我试过:

• 卸载/重新安装 Sinatra
• 更新所有 gem
• 确保所有依赖项都存在(机架)

有什么想法吗？非常感谢您的宝贵时间和帮助!

Answer 1

这个问题显然只出现在 Linux 的 1.8-head 上。它与正则表达式匹配有关。如果您查看代码:path 确实匹配 /((:\w+)|[\*#{special_chars.join}])/，但 >$2 是 nil，即使它应该是一个字符串。

我建议您暂时切换您的 ruby​​ 版本。