execute (Debugger::ContinueCommand)

    # File cli/ruby-debug/commands/continue.rb, line 11
        def execute
          if @match[1] && !@state.context.dead?
            filename = File.expand_path(@state.file)
            line_number = get_int(@match[1], "Continue", 0, nil, 0)
            return unless line_number
            unless LineCache.trace_line_numbers(filename).member?(line_number)
              errmsg("Line %d is not a stopping point in file \"%s\".\n",
                     line_number, filename)
              return
            end
            @state.context.set_breakpoint(filename, line_number)
          end
          @state.proceed
        end