/**
 * If this is an IP address, this returns the IP address in canonical form.
 *
 * Otherwise, this performs IDN ToASCII encoding and canonicalize the result to lowercase. For
 * example this converts `☃.net` to `xn--n3h.net`, and `WwW.GoOgLe.cOm` to `www.google.com`.
 * `null` will be returned if the host cannot be ToASCII encoded or if the result contains
 * unsupported ASCII characters.
 */
internal fun String.toCanonicalHost(): String? {

			return err // Global headers return here
		}
	}

	// Pack the main header.
	var f formatter // Ignore errors since they are expected
	fmtStr := func(b []byte, s string) { f.formatString(b, toASCII(s)) }
	blk := tw.templateV7Plus(hdr, fmtStr, f.formatOctal)
	blk.setFormat(FormatPAX)
	if err := tw.writeRawHeader(blk, hdr.Size, hdr.Typeflag); err != nil {
		return err
	}

          assertEquals(
            true,
            ioe.cause
              ?.cause
              ?.message
              ?.startsWith("Invalid input to toASCII"),
          )
        }

        else -> {
          throw ioe
        }
      }
    }
  }

  @Test
  @Disabled("breaks conscrypt test")
  fun testBouncyCastleRequest() {