# File lib/rake/application.rb, line 569
569:     def const_warning(const_name)
570:       @const_warning ||= false
571:       if ! @const_warning
572:         $stderr.puts %{WARNING: Deprecated reference to top-level constant '#{const_name}' } +
573:           %{found at: #{rakefile_location}} # '
574:         $stderr.puts %{    Use --classic-namespace on rake command}
575:         $stderr.puts %{    or 'require "rake/classic_namespace"' in Rakefile}
576:       end
577:       @const_warning = true
578:     end