gistfile1.txt

Clone Thick repo (git://github.com/marekjelen/thick.git)

Install required gems (rack, rake, rspec, sinatra)

JRuby version: jruby-1.7.0.preview1

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cd thick/example
jruby ../bin/thick -R

curl http://localhost:9292/

and the request end with const missing error.

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Edit jruby-1.7.0.preview1/gems/rack-protection-1.2.0/lib/rack/protection.rb in the block remove starting "::" from names

        use Rack::Protection::FrameOptions,     options unless except.include? :frame_options
        use Rack::Protection::IPSpoofing,       options unless except.include? :ip_spoofing
        use Rack::Protection::JsonCsrf,         options unless except.include? :json_csrf
        use Rack::Protection::PathTraversal,    options unless except.include? :path_traversal
        use Rack::Protection::RemoteToken,      options unless except.include? :remote_token
        use Rack::Protection::SessionHijacking, options unless except.include? :session_hijacking
        use Rack::Protection::XSSHeader,        options unless except.include? :xss_header

restart the server and it ends with a different error in Sinatra.

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The "extreme" use-case this happens (https://github.com/marekjelen/thick/blob/loader/lib/thick/loader.rb)