[Demonstration 1]

[Buggy Method]
public static void register(PacketFactoryRegistry registry) {
    registry.register(ConnectionType.CLIENT, TYPE, TYPE_REVERSE_ENGINES, new PacketFactory() {

        @Override
        public Class<? extends ArtemisPacket> getFactoryClass() {
            return KeystrokePacket.class;
        }

        @Override
        public ArtemisPacket build(PacketReader reader) throws ArtemisPacketException {
            return new KeystrokePacket(reader);
        }
    });
}

[Buggy Hunk]
registry.register(ConnectionType.CLIENT, TYPE, TYPE_REVERSE_ENGINES,

[Patch]
registry.register(ConnectionType.CLIENT, TYPE, TYPE_KEYSTROKE,

[Demonstration 2]

[Buggy Method]
private boolean isOnline() {
    ConnectivityManager conMgr = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = conMgr.getActiveNetworkInfo();
    if (netInfo == null || !netInfo.isConnected() || !netInfo.isAvailable()) {
        Toast.makeText(getApplicationContext(), getString(R.string.connection_timeout), Toast.LENGTH_LONG).show();
        return false;
    }
    return true;
}

[Buggy Hunk]
Toast.makeText(getApplicationContext(), getString(R.string.connection_timeout), Toast.LENGTH_LONG).show();

[Patch]
Toast.makeText(getApplicationContext(), getString(R.string.connection_timeout_message), Toast.LENGTH_LONG).show();

[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));