title: File contains data in an unknown format (Runtime Error)
body: <p>I'm trying to build and run ruby code that a team member wrote for a class project. </p>
  
  <p>This is the error that I'm getting:</p>
  
  <pre><code>PS C:\users\bryan\Team6\PlanetDefense&gt; ruby main.rb
  C:/Ruby192/lib/ruby/gems/1.9.1/gems/gosu-0.7.41-x86-mingw32/lib/gosu/patches.rb:36:in
  'initialize': File contains data in an unknown format. (RuntimeError)
      from C:/Ruby192/lib/ruby/gems/1.9.1/gems/gosu-0.7.41-x86-mingw32/lib/gosu/patches.rb:36:in `initialize'
      from C:/users/bryan/Team6/PlanetDefense/classes/playstate.rb:9:in `new'
      from C:/users/bryan/Team6/PlanetDefense/classes/playstate.rb:9:in `initialize'
      from C:/Ruby192/lib/ruby/gems/1.9.1/gems/chingu-0.8.1/lib/chingu/game_state_manager.rb:300:in `new'
      from C:/Ruby192/lib/ruby/gems/1.9.1/gems/chingu-0.8.1/lib/chingu/game_state_manager.rb:300:in `game_state_instance'
      from C:/Ruby192/lib/ruby/gems/1.9.1/gems/chingu-0.8.1/lib/chingu/game_state_manager.rb:148:in `push_game_state'
      from C:/Ruby192/lib/ruby/gems/1.9.1/gems/chingu-0.8.1/lib/chingu/helpers/game_state.rb:37:in `push_game_state'
      from main.rb:22:in `initialize'
      from main.rb:56:in `new'
      from main.rb:56:in `&lt;main&gt;'`
  </code></pre>
  
  <p>This appears to be the offending code:</p>
  
  <pre><code>class Gosu::Song
    alias initialize_ initialize
  
    def initialize(*args)
      args.shift if args.first.is_a? Gosu::Window
      initialize_(*args)
    end
  end
  </code></pre>
  
  <p>Any ideas on what the "data in an unknown format" is? I've googled and can't come up with anything? Thanks for the help.</p>