[Demonstration 1]

[Buggy Method]
protected List<RepositoryElementMetaInterface> getPdiObjects(ObjectId dirId, List<RepositoryObjectType> objectTypes, boolean includeDeleted) throws KettleException {
    try {
        //RepositoryDirectoryInterface repDir = getRootDir().findDirectory( dirId );
        RepositoryFile dirFile = pur.getFile(dirId.getId());
        RepositoryDirectory repDir = new RepositoryDirectory();
        repDir.setObjectId(dirId);
        repDir.setName(dirFile.getName());
        List<RepositoryElementMetaInterface> list = new ArrayList<RepositoryElementMetaInterface>();
        List<RepositoryFile> nonDeletedChildren = getAllFilesOfType(dirId, objectTypes);
        for (RepositoryFile file : nonDeletedChildren) {
            RepositoryLock lock = unifiedRepositoryLockService.getLock(file);
            RepositoryObjectType objectType = getObjectType(file.getName());
            list.add(new EERepositoryObject(file, repDir, null, objectType, null, lock, false));
        }
        if (includeDeleted) {
            String dirPath = null;
            if (dirId != null) {
                // derive path using id
                dirPath = pur.getFileById(dirId.getId()).getPath();
            }
            List<RepositoryFile> deletedChildren = getAllDeletedFilesOfType(dirPath, objectTypes);
            for (RepositoryFile file : deletedChildren) {
                RepositoryLock lock = unifiedRepositoryLockService.getLock(file);
                RepositoryObjectType objectType = getObjectType(file.getName());
                list.add(new EERepositoryObject(file, repDir, null, objectType, null, lock, true));
            }
        }
        return list;
    } catch (Exception e) {
        throw new KettleException("Unable to get list of objects from directory [" + dirId + "]", e);
    }
}

[Buggy Hunk]
RepositoryFile dirFile = pur.getFile( dirId.getId() );

[Patch]
RepositoryFile dirFile = pur.getFileById( dirId.getId() );

[Demonstration 2]

[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 3]

[Buggy Method]
public RawFile get(String projectName, String url, String newPath, Repository repository) throws IOException {
    String path = persistentStore.getPathForURLInProject(projectName, url);
    byte[] contents;
    if (path == null) {
        path = newPath;
        contents = fetch(projectName, url, path);
    } else {
        Util.sout("Found (" + projectName + "): " + url);
        Util.sout("At (" + projectName + "): " + path);
        contents = new RepositoryObjectTreeWalker(repository).getDirectoryContents().getFileTable().get(path).getContents();
    }
    return new RepositoryFile(path, contents);
}

[Buggy Hunk]
return new RepositoryFile(path, contents);

[Patch]
return new RepositoryFile(newPath, contents);