while (++i < limit) {
              if (input[i] == ']') break
            }
          }
          ':' -> return i
        }
        i++
      }
      return limit // No colon.
    }

    private fun parsePort(
      input: String,
      pos: Int,
      limit: Int,
    ): Int {
      return try {
        // Canonicalize the port string to skip '\n' etc.