run (Gem::CommandManager)

    # File lib/rubygems/command_manager.rb, line 74
        def run(args)
          process_args(args)
        rescue StandardError, Timeout::Error => ex
          alert_error "While executing gem ... (#{ex.class})\n    #{ex.to_s}"
          ui.errs.puts "\t#{ex.backtrace.join "\n\t"}" if
            Gem.configuration.backtrace
          terminate_interaction(1)
        rescue Interrupt
          alert_error "Interrupted"
          terminate_interaction(1)
        end