[Demonstration 1]

[Buggy Method]
@Override
protected Map<Integer, String> createResult(Map<Integer, String> map) {
    ExecutorService executor = getExecutor();
    Map<Integer, Future<String>> results = new TreeMap<Integer, Future<String>>();
    /* setup list */
    for (int i = 1; i < this.max; i++) {
        results.put(i, executor.submit(new FizzBuzzCallable(i)));
    }
    // collect result
    for (Entry<Integer, Future<String>> entry : results.entrySet()) {
        map.put(entry.getKey(), entry.getValue().get());
    }
    return map;
}

[Buggy Hunk]
for (Entry<Integer,Future<String>> entry : results.entrySet()) {

[Patch]
for (Map.Entry<Integer,Future<String>> entry : results.entrySet()) {

[Demonstration 2]

[Buggy Method]
public List<Unit> getAllUnits() {
    List<Unit> units = new LinkedList<>();
    // 1. build the query
    String query = "SELECT * FROM " + TABLE_UNITS;
    // 2. get reference to writable DB
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery(query, null);
    // 3. go over each row, build unit and add it to list
    Unit unit;
    if (cursor.moveToFirst()) {
        do {
            unit = new Unit();
            unit.setId(Integer.parseInt(cursor.getString(0)));
            unit.setUnit(cursor.getString(1));
            unit.setDimension(cursor.getString(2));
            unit.setFactor(Float.parseFloat(cursor.getString(3)));
            // add unit to units
            units.add(unit);
        } while (cursor.moveToNext());
    }
    Log.d("getAllUnits()", units.toString());
    cursor.close();
    return units;
}

[Buggy Hunk]
unit = new Unit();

[Patch]
unit = new Unit(myContext);

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));