#vulnerable code 
                                protected void writeBytesInternal(final long index, @NotNull final BytesStore bytes, boolean metadata) {
        final int cycle = queue.rollCycle().toCycle(index);
        long headerNumber = wire.headerNumber();

        if (wire == null) {
            setCycle2(cycle, true);
            headerNumber = wire.headerNumber();
        } else if (queue.rollCycle().toCycle(headerNumber) != cycle) {
            rollCycleTo(cycle);
            headerNumber = wire.headerNumber();
        }

        boolean isNextIndex = index == headerNumber + 1;
        if (!isNextIndex) {

            // in case our cached headerNumber is incorrect.
            if (resetPosition()) {

                headerNumber = wire.headerNumber();

                /// if the header number has changed then we will have roll
                if (queue.rollCycle().toCycle(headerNumber) != cycle) {
                    rollCycleTo(cycle);
                    headerNumber = wire.headerNumber();
                }
            }

            isNextIndex = index == headerNumber + 1;
            if (!isNextIndex) {
                if (index > headerNumber + 1)
                    throw new IllegalStateException("Unable to move to index " + Long.toHexString(index) + " beyond the end of the queue, current: " + Long.toHexString(headerNumber));
                Jvm.warn().on(getClass(), "Trying to overwrite index " + Long.toHexString(index) + " which is before the end of the queue");
                return;
            }
        }
        writeBytesInternal(bytes, metadata);
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                protected void writeBytesInternal(final long index, @NotNull final BytesStore bytes, boolean metadata) {
        final int cycle = queue.rollCycle().toCycle(index);

        if (wire == null)
            setCycle2(cycle, true);
        else if (queue.rollCycle().toCycle(wire.headerNumber()) != cycle)
            rollCycleTo(cycle);

        long headerNumber = wire.headerNumber();
        boolean isNextIndex = index == headerNumber + 1;
        if (!isNextIndex) {

            // in case our cached headerNumber is incorrect.
            if (resetPosition()) {

                headerNumber = wire.headerNumber();

                /// if the header number has changed then we will have roll
                if (queue.rollCycle().toCycle(headerNumber) != cycle) {
                    rollCycleTo(cycle);
                    headerNumber = wire.headerNumber();
                }
            }

            isNextIndex = index == headerNumber + 1;
            if (!isNextIndex) {
                if (index > headerNumber + 1)
                    throw new IllegalStateException("Unable to move to index " + Long.toHexString(index) + " beyond the end of the queue, current: " + Long.toHexString(headerNumber));
                Jvm.warn().on(getClass(), "Trying to overwrite index " + Long.toHexString(index) + " which is before the end of the queue");
                return;
            }
        }
        writeBytesInternal(bytes, metadata);
    }