Sample Reel server, to cause reproducible error.

reel.rb

require 'rubygems'
require 'bundler/setup'
require 'reel'

class MyServer < Reel::Server
  def initialize(host = "0.0.0.0", port = 80)
    super(host, port, &method(:on_connection))
  end

  def on_connection(connection)
    while request = connection.request
      case request
      when Reel::Request
        handle_request(request)
      when Reel::WebSocket
        handle_websocket(request)
      end
    end
  end

  def handle_request(request)
    request.respond :ok, "Hello, world!"
  end

  def handle_websocket(sock)
    sock << "Hello everyone out there in WebSocket land!"
    sock.close
  end
end

MyServer.run