mt.TFlag = 0
	mt.Hash = fnv1(etyp.Hash, 'm', byte(ktyp.Hash>>24), byte(ktyp.Hash>>16), byte(ktyp.Hash>>8), byte(ktyp.Hash))
	mt.Key = ktyp
	mt.Elem = etyp
	mt.Bucket = bucketOf(ktyp, etyp)
	mt.Hasher = func(p unsafe.Pointer, seed uintptr) uintptr {
		return typehash(ktyp, p, seed)
	}
	mt.Flags = 0
	if ktyp.Size_ > abi.MapMaxKeyBytes {
		mt.KeySize = uint8(goarch.PtrSize)
		mt.Flags |= 1 // indirect key

	//
	// by the DECLARE_HANDLE macro in STRICT mode. The macro is declared in
	// the Windows ntdef.h header,
	//
	// https://github.com/tpn/winsdk-10/blob/master/Include/10.0.16299.0/shared/ntdef.h#L779
	if goos != "windows" {
		return false
	}
	if len(dt.Field) != 1 {
		return false
	}
	if dt.StructName != name+"__" {
		return false
	}