[Demonstration 1]

[Buggy Method]
@Override
public void run() {
    ConsumerIterator<byte[], byte[]> it = stream.iterator();
    String msg;
    while (it.hasNext()) {
        try {
            msg = new String(it.next().message(), "UTF8");
        } catch (UnsupportedEncodingException ex) {
            msg = new String(it.next().message());
        }
        Optional<Object> result;
        if (this.operation != null) {
            result = operation.perform(msg);
        } else {
            result = Optional.of(msg);
        }
        msgsCount.incrementAndGet();
        if (!result.isPresent()) {
            continue;
        }
        if (outputTopic != null) {
            producer.publish(msg, outputTopic);
        } else {
            println(result.get().toString());
        }
    }
    //        System.out.println("Shutting down Thread: " + threadNumber);
}

[Buggy Hunk]
producer.publish(msg, outputTopic);

[Patch]
producer.publish(result.get().toString(), outputTopic);

[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]
private byte[] encodeLong(long value) {
    byte[] result = new byte[8];
    for (int i = 7; i >= 0; i--) {
        result[i] = (byte) (value & 0xffL);
        value >>= 8;
    }
    return result;
}

[Buggy Hunk]
private byte[] encodeLong(long value) {

[Patch]
public static byte[] encodeLong(long value) {