version_4_3.rb

        #(line 252, voor vagrant 1.7.4)
        def read_forwarded_ports(uuid=nil, active_only=false)
          uuid ||= @uuid

          @logger.debug("read_forward_ports: uuid=#{uuid} active_only=#{active_only}")

          results = []
          current_nic = nil

          # eat exceptions if showvminfo breaks
          begin
            info = execute("showvminfo", uuid, "--machinereadable", retryable: true)
          rescue Exception => e
            @logger.warn "unable to read ports for ${uuid}"
            return []
          end