#vulnerable code 
                                void releaseValue(long newValueReference) {
        memoryManager.releaseSlice(buildValueSlice(newValueReference));
    } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                Chunk(ByteBuffer minKey, Chunk<K, V> creator, OakComparator<K> comparator, MemoryManager memoryManager,
          int maxItems, AtomicInteger externalSize,
          OakSerializer<K> keySerializer, OakSerializer<V> valueSerializer) {
        this.memoryManager = memoryManager;
        this.maxItems = maxItems;
        this.entries = new int[maxItems * FIELDS + FIRST_ITEM];
        this.entryIndex = new AtomicInteger(FIRST_ITEM);

        this.sortedCount = new AtomicInteger(0);
        this.minKey = minKey;
        this.creator = new AtomicReference<>(creator);
        if (creator == null) {
            this.state = new AtomicReference<>(State.NORMAL);
        } else {
            this.state = new AtomicReference<>(State.INFANT);
        }
        this.next = new AtomicMarkableReference<>(null, false);
        this.pendingOps = new AtomicInteger();
        this.rebalancer = new AtomicReference<>(null); // to be updated on rebalance
        this.statistics = new Statistics();
        this.comparator = comparator;
        this.externalSize = externalSize;

        this.keySerializer = keySerializer;
        this.valueSerializer = valueSerializer;
    }