[Demonstration 1]

[Buggy Method]
@MotechListener(subjects = { EventSubjects.CREATE_AND_ENROLL })
public void handleCreateAndEnroll(MotechEvent event) {
    Map<String, Object> params = new HashMap<>();
    params.put(EventParams.PROGRAM, event.getParameters().remove(EventParams.PROGRAM));
    params.put(EventParams.DATE, event.getParameters().remove(EventParams.DATE));
    params.put(EventParams.EXTERNAL_ID, event.getParameters().get(EventParams.EXTERNAL_ID));
    TrackedEntityInstanceDto instance = createTrackedEntityInstanceFromParams(event.getParameters());
    dhisWebService.createTrackedEntityInstance(instance);
    MotechEvent newEvent = new MotechEvent(EventSubjects.ENROLL_IN_PROGRAM, params);
    EnrollmentDto enrollmentDto = createEnrollmentFromParams(event.getParameters());
    dhisWebService.createEnrollment(enrollmentDto);
}

[Buggy Hunk]
EnrollmentDto enrollmentDto = createEnrollmentFromParams(event.getParameters());

[Patch]
EnrollmentDto enrollmentDto = createEnrollmentFromParams(newEvent.getParameters());

[Demonstration 2]

[Buggy Method]
public void addReceipt(Receipt receipt) {
    // get reference to writable DB
    SQLiteDatabase db = this.getWritableDatabase();
    // create ContentValues to add key "column"/value
    ContentValues values = new ContentValues();
    values.put(RECEIPT_ID, receipt.id);
    values.put(DATE, receipt.date.getMillis());
    values.put(MATCH_LEVEL, receipt.matchLevel);
    // insert
    db.insert(TABLE_RECEIPT, null, values);
    // close
    db.close();
}

[Buggy Hunk]
values.put(DATE, receipt.date.getMillis());

[Patch]
values.put(DATE, receipt.date.getMillis() / 1000);

[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));