DataBlock newBlock = null;
            if (lookup.entry != null) {
                DataBlock block = store.read(lookup.entry.dataBlock, DataBlock.class);
                DataBlockUpdateResult updateResult = block.useNewValue(value);
                if (updateResult.isFailed()) {
                    store.remove(block);
                    newBlock = new DataBlock(value, updateResult.getSerializedValue());

	for f.nb < 1+2 {
		if f.err = f.moreBits(); f.err != nil {
			return
		}
	}
	f.final = f.b&1 == 1
	f.b >>= 1
	typ := f.b & 3
	f.b >>= 2
	f.nb -= 1 + 2
	switch typ {
	case 0:
		f.dataBlock()
	case 1:
		// compressed, fixed Huffman tables
		f.hl = &fixedHuffmanDecoder
		f.hd = nil
		f.huffmanBlock()
	case 2:
		// compressed, dynamic Huffman tables
		if f.err = f.readHuffman(); f.err != nil {