// be able to read the next symbol out of the previously read bits.
			// First, undo the readByte that the ensureNBits call made.
			if d.bytes.nUnreadable != 0 {
				d.unreadByteStuffedByte()
			}
			goto slowPath
		}
	}
	if v := h.lut[(d.bits.a>>uint32(d.bits.n-lutSize))&0xff]; v != 0 {
		n := (v & 0xff) - 1
		d.bits.n -= int32(n)
		d.bits.m >>= n
		return uint8(v >> 8), nil