#fixed code
                                @Test
    public void testWriteAndRead() throws Exception {
        try (DirectStore allocate = DirectStore.allocate(150)) {

            final BytesRingBuffer bytesRingBuffer = new BytesRingBuffer(allocate.bytes());
            bytesRingBuffer.offer(output.clear());
            Bytes actual = bytesRingBuffer.take(maxSize -> input.clear());
            assertEquals(EXPECTED, actual.readUTF());
        }
    }
#vulnerable code 
                                @Test
    public void testWriteAndRead() throws Exception {
        try (DirectStore allocate = DirectStore.allocate(150)) {

            final BytesQueue bytesRingBuffer = new BytesQueue(allocate.bytes());
            bytesRingBuffer.offer(output.clear());
            Bytes poll = bytesRingBuffer.poll(input.clear());
            assertEquals(EXPECTED, poll.readUTF());
        }
    } 
                            #location 8 
                            #vulnerability type NULL_DEREFERENCE