[Demonstration 1]

[Buggy Method]
@Override
public void onDestroy() {
    Log.e(TAG, "LifeCycle onDestroy");
    if (mPreview != null) {
        mPreview.destroyDrawingCache();
        mPreview.mCamera = null;
    }
    mDrawingBitmap = null;
    super.onDestroy();
}

[Buggy Hunk]
Log.e(TAG,"LifeCycle onDestroy");

[Patch]
Log.e(TAG,TAG+"LifeCycle onDestroy");

[Demonstration 2]

[Buggy Method]
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
    allJobs = null;
    final View rootView = inflater.inflate(R.layout.fragment_scratch_converter_sliding_up_panel, container, false);
    convertIconImageView = (ImageView) rootView.findViewById(R.id.scratch_convert_icon);
    convertPanelHeadlineView = (TextView) rootView.findViewById(R.id.scratch_convert_headline);
    convertPanelStatusView = (TextView) rootView.findViewById(R.id.scratch_convert_status_text);
    convertProgressLayout = (RelativeLayout) rootView.findViewById(R.id.scratch_convert_progress_layout);
    convertProgressBar = (ProgressBar) rootView.findViewById(R.id.scratch_convert_progress_bar);
    convertStatusProgressTextView = (TextView) rootView.findViewById(R.id.scratch_convert_status_progress_text);
    upDownArrowImageView = (ImageView) rootView.findViewById(R.id.scratch_up_down_image_button);
    conversionList = (RelativeLayout) rootView.findViewById(R.id.scratch_conversion_list);
    conversionListView = (ListView) rootView.findViewById(R.id.scratch_conversion_list_view);
    convertedProgramsList = (RelativeLayout) rootView.findViewById(R.id.scratch_converted_programs_list);
    convertedProgramsListView = (ListView) rootView.findViewById(R.id.scratch_converted_programs_list_view);
    convertPanelStatusView.setVisibility(View.VISIBLE);
    convertProgressLayout.setVisibility(View.GONE);
    conversionList.setVisibility(View.GONE);
    convertedProgramsList.setVisibility(View.GONE);
    return rootView;
}

[Buggy Hunk]
allJobs = null;

[Patch]
allJobs = new ArrayList<>();

[Demonstration 3]

[Buggy Method]
@Before
public void createTestFile() {
    File file = new File(TEST_FILE_NAME);
    createFileWithSize(file, TEST_FILE_SIZE);
    taskFile = new TaskFile(file.toPath());
}

[Buggy Hunk]
taskFile = new TaskFile(file.toPath());

[Patch]
taskFile = new TaskFile(null, file.toPath());