#vulnerable code 
                                @Test
    public void testFlowAroundSingleThreadedWriteDiffrentSizeBuffers() throws Exception {

        for (int j = 23 + 34; j < 100; j++) {
            try (DirectStore allocate = DirectStore.allocate(j)) {

                final BytesQueue bytesRingBuffer = new BytesQueue(allocate.bytes());

                for (int i = 0; i < 50; i++) {
                    bytesRingBuffer.offer(output.clear());
                    assertEquals(EXPECTED, bytesRingBuffer.poll(input.clear()).readUTF());
                }
            }
        }
    } 
                            #location 11 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void testFlowAroundSingleThreadedWriteDiffrentSizeBuffers() throws Exception {

        for (int j = 23 + 34; j < 100; j++) {
            try (DirectStore allocate = DirectStore.allocate(j)) {

                final BytesRingBuffer bytesRingBuffer = new BytesRingBuffer(allocate.bytes());

                for (int i = 0; i < 50; i++) {
                    bytesRingBuffer.offer(output.clear());
                    assertEquals(EXPECTED, bytesRingBuffer.take(maxSize -> input.clear()).readUTF());
                }
            }
        }
    }