Creates deadlock recursive locking on rack-1.4.1. MUST RUN IT TWICE!

rack_lock_deadlock

require 'rubygems'
require 'thin'
require 'rack'
 
success = Rack::URLMap.new("/" => lambda { |env| [200, {"Content-Type" => "text/plain"}, ["bar"]] })
 
success_app = Rack::Builder.new {
  use Rack::Lock
  run success
}.to_app
 
error = Rack::URLMap.new("/" => lambda { |env| [404, {"Content-Type" => "text/plain"}, ["foo"]] })
 
error_app = Rack::Builder.new {
  use Rack::Lock
  run error
}.to_app
 
Rack::Handler::Thin.run Rack::Cascade.new([
  error_app,
  success_app
])