monkey_load_error.rb

# Monkey-patch LoadError's message to include the current $LOAD_PATH.
class LoadError
  def initialize(*args)
    super
    @path = $LOAD_PATH.dup
  end

  def message
    if $servlet_context && $servlet_context.get_init_parameter('rack.load.path.debug') == 'true'
      $servlet_context.log("Current path:\n" + @path.join("\n"))
    end
    super
  end
end