“remove#const'；中的Ruby Sinatra Hello World错误：常量URI:：WFKV_uu未定义（名称错误）

只是想让简单的http服务器运行，却对ruby一无所知

/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:53:in `remove_const': constant URI::WFKV_ not defined (NameError)
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:53:in `<module:URI>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:19:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/utils.rb:12:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/utils.rb:12:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/request.rb:1:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/request.rb:1:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:3:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:3:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/showexceptions.rb:1:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/showexceptions.rb:1:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/base.rb:12:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/base.rb:12:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra.rb:4:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra.rb:4:in `<top (required)>'
    from http.rb:1:in `require'
    from http.rb:1:in `<main>'

/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backport/uri/common_192.rb:53:在'remove_const'中：未定义常量uri:：WFKV_（名称错误）
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backport/uri/common_192.rb:53:in`'
来自/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backport/uri/common_192.rb:19:in`'
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/utils.rb:12:in'require'
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/utils.rb:12:in`'
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/request.rb:1:in'require'
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/request.rb:1:in`'
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:3:in'require'
from/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:3:in`'
from/usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/showexceptions.rb:1:in'require'
from/usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/showexceptions.rb:1:in`'
from/usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/base.rb:12:in'require'
from/usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/base.rb:12:in`'
from/usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra.rb:4:in'require'
from/usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra.rb:4:in`'
来自http.rb:1:in'require'
从http.rb:1:in`'

这是我在centos上的ruby版本

ruby 1.9.1p376（2009-12-07修订版26041）[x86\u 64-linux]

---

对于ruby-1.9.1和rake-1.3.5所特有的已知问题，任何帮助都将不胜感激。请看。更新ruby 1.9.2或1.9.3版本怎么样

更新

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一方面，在ruby 1.9.1版本中没有WFKV_uu常量，在ruby 1.9.2版本中出现。另一方面，该常数在rack的uri/common_192.rb文件中定义。2011年10月03日Ben Hamill通过添加

remove_const:WFKV\ukv

代码行修复了问题#246“消除标准库中重新定义该常数的警告”，该修复包含在rack-1.3.5版本中。因此，如果使用1.9.1版本，则必须使用rack-1.3.4。

请提供导致此错误的代码内容。理想情况下，继续删除代码（只要此错误仍然发生），直到您接近复制所需的最小代码行数。FWIW，我可以使用以下代码进行复制：

require'sinatra'

我将查看此情况，看看更新是否修复了它。。。我使用了rpm，所以我可以从源代码编译