[Demonstration 1]

[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));

[Demonstration 2]

[Buggy Method]
private static void getLogo(long userId) throws IOException {
    System.out.println("Getting logo");
    WebResource resource = client.resource("http://localhost:8080/users/" + userId + "/logo");
    File file = resource.get(File.class);
    file.renameTo(new File(logoDownloadPath));
    System.out.println("Downloaded file to " + logoDownloadPath + "\n");
}

[Buggy Hunk]
file.renameTo(new File(logoDownloadPath));

[Patch]
file.renameTo(new File(logoDownloadPath + "/downloaded.jpg"));

[Demonstration 3]

[Buggy Method]
@ReactMethod
public void copyDataset(String datasourceId, String datasetId, String desDatasetName, int encodeType, Promise promise) {
    try {
        m_datasource = m_DatasourceList.get(datasourceId);
        Dataset dataset = JSDataset.getObjById(datasetId);
        Dataset desDataset = m_datasource.copyDataset(dataset, desDatasetName, (EncodeType) Enum.parse(EncodeType.class, encodeType));
        String datasetId1 = JSDataset.registerId(dataset);
        WritableMap map = Arguments.createMap();
        map.putString("datasetId", datasetId1);
        promise.resolve(map);
    } catch (Exception e) {
        promise.reject(e);
    }
}

[Buggy Hunk]
String datasetId1 = JSDataset.registerId(dataset);

[Patch]
String datasetId1 = JSDataset.registerId(desDataset);