[Demonstration 1]

[Buggy Method]
public InputStream getInfoFromREDCapProject(String fields, String exportFormat) throws ClientProtocolException, IOException {
    ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair(FIELD_TOKEN, this.tokenID));
    params.add(new BasicNameValuePair(FIELD_CONTENT, "project"));
    params.add(new BasicNameValuePair(FIELD_FORMAT, exportFormat));
    if (fields != null && !("".equals(fields))) {
        params.add(new BasicNameValuePair(FIELD_FIELDS, fields));
    }
    logger.info("Getting record input stream...");
    HttpResponse response = getREDCapHttpResponse(params);
    return response.getEntity().getContent();
}

[Buggy Hunk]
public InputStream getInfoFromREDCapProject(String fields, String exportFormat) throws ClientProtocolException, IOException {

[Patch]
public InputStream getInfoFromREDCapProject(String fields, String exportFormat) throws ClientProtocolException, IOException, KeyManagementException, NoSuchAlgorithmException, KeyStoreException {

[Demonstration 2]

[Buggy Method]
private XmlMetaDataModel buildXMLMetaDataModel(Map<SchemaType, XmlMetaDataModel> visitedTypes, SchemaType propertyType) {
    XmlMetaDataModel model;
    if (visitedTypes.containsKey(propertyType)) {
        model = visitedTypes.get(propertyType);
    } else {
        ArrayList<MetaDataField> fields = new ArrayList<MetaDataField>();
        model = new DefaultXmlMetaDataModel(schemas, rootElementName, fields, namespaceManager);
        visitedTypes.put(propertyType, model);
        loadFields(propertyType, fields, visitedTypes);
    }
    return model;
}

[Buggy Hunk]
ArrayList<MetaDataField> fields = new ArrayList<MetaDataField>();

[Patch]
final ArrayList<MetaDataField> fields = new ArrayList<MetaDataField>();

[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));