# File cli/ruby-debug/commands/info.rb, line 356
    def info_threads(*args)
      ok, verbose = info_thread_preamble(args[0])
      return unless ok
      threads = Debugger.contexts.sort_by{|c| c.thnum}.each do |c|
        display_context(c, !verbose)
        if verbose and not c.ignored?
          (0...c.stack_size).each do |idx|
            print "\t"
            print_frame(idx, false, c)
          end
        end
      end
    end