// Host info precedes.
              val portColonOffset = portColonOffset(input, pos, componentDelimiterOffset)
              if (portColonOffset + 1 < componentDelimiterOffset) {
                host = input.percentDecode(pos = pos, limit = portColonOffset).toCanonicalHost()
                port = parsePort(input, portColonOffset + 1, componentDelimiterOffset)
                require(port != -1) {