#fixed code
                                @Override
    public void forEachRemaining(Consumer<? super E> action) {
        Objects.requireNonNull(action);
        if (!exhausted) {
            exhausted = true;
            Object p = current;
            current = null;
            forEachFrom(action, p);
        }
    }
#vulnerable code 
                                @Override
    public void forEachRemaining(Consumer<? super E> action) {
        Objects.requireNonNull(action);
        if (!exhausted) {
            exhausted = true;
            ReentrantLock lock = queueLock;
            Object p = current;
            current = null;
            do {
                E e = null;
                lock.lock();
                try {
                    if (p != null || (p = getQueueFirst(queue)) != null)
                        do {
                            e = getNodeItem(p);
                            p = succ(p);
                        } while (e == null && p != null);
                } finally {
                    // checkInvariants();
                    lock.unlock();
                }
                if (e != null)
                    action.accept(e);
            } while (p != null);
        }
    } 
                            #location 4 
                            #vulnerability type THREAD_SAFETY_VIOLATION