return
	}

	if !strings.HasPrefix(val, "0x") {
		Exitf("-B argument must start with 0x: %s", val)
	}

	ov := val
	val = val[2:]

	const maxLen = 32
	if hex.DecodedLen(len(val)) > maxLen {
		Exitf("-B option too long (max %d digits): %s", maxLen, ov)
	}

	b, err := hex.DecodeString(val)
	if err != nil {
		if err == hex.ErrLength {
			Exitf("-B argument must have even number of digits: %s", ov)
		}

//   - github.com/goccy/go-json
//   - github.com/wI2L/jettison
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname reflect_maplen reflect.maplen
func reflect_maplen(h *hmap) int {
	if h == nil {
		return 0
	}
	if raceenabled {
		callerpc := getcallerpc()
		racereadpc(unsafe.Pointer(h), callerpc, abi.FuncPCABIInternal(reflect_maplen))
	}