info_thread (Debugger)

    # File cli/ruby-debug/commands/info.rb, line 367
        def info_thread(*args)
          unless args[0]
            info_threads(args[0])
            return
          end
          ok, verbose = info_thread_preamble(args[1])
          return unless ok
          c = parse_thread_num("info thread" , args[0])
          return unless 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