`remove_const’中的Ruby Sinatra Hello World错误：常量URI :: WFKV_未定义（NameError）
只是试图让简单的http服务器运行，并且没有关于ruby的线索
/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 `' from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/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 `' from http.rb:1:in `require' from http.rb:1:in `' 这是我的版本ruby on centos ruby 1.9.1p376 (2009-12-07 revision 26041) [x86_64-linux]
任何帮助将非常感激
这是ruby-1.9.1和rake-1.3.5特有的已知问题。 请看这个 。 如何更新1.9.2或1.9.3版本的ruby？
UPDATE
一方面，ruby 1.9.1版本中没有WFKV_常量，并且出现在1.9.2版本中。 另一方面，此常量在rack的uri / common_192.rb文件中定义。 2011-10-03 Ben Hamill解决了问题＃246’通过添加remove_const :WFKV_代码行来解决关于从标准库重新定义此常量的警告’，并且此修复包含在rack-1.3.5版本中。 因此，如果您使用1.9.1版本，则必须使用rack-1.3.4。