it.overflow = h.extra.overflow
		it.oldoverflow = h.extra.oldoverflow
	}

	// decide where to start
	r := uintptr(rand())
	it.startBucket = r & bucketMask(h.B)
	it.offset = uint8(r >> h.B & (abi.MapBucketCount - 1))

	// iterator state
	it.bucket = it.startBucket

	// Remember we have an iterator.
	// Can run concurrently with another mapiterinit().

	t           unsafe.Pointer
	h           unsafe.Pointer
	buckets     unsafe.Pointer
	bptr        unsafe.Pointer
	overflow    *[]unsafe.Pointer
	oldoverflow *[]unsafe.Pointer
	startBucket uintptr
	offset      uint8
	wrapped     bool
	B           uint8
	i           uint8
	bucket      uintptr
	checkBucket uintptr
}

func (h *hiter) initialized() bool {
	return h.t != nil