# File lib/addressable/uri.rb, line 1622
    def fragment=(new_fragment)
      if new_fragment && !new_fragment.respond_to?(:to_str)
        raise TypeError, "Can't convert #{new_fragment.class} into String."
      end
      @fragment = new_fragment ? new_fragment.to_str : nil

      # Reset dependant values
      @normalized_fragment = nil
      @uri_string = nil
      @hash = nil

      # Ensure we haven't created an invalid URI
      validate()
    end