[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]
@Override
protected TransformerSubscription<T, T> createSubscription(Subscriber<? super T> out) {
    return new IdentityTransformerSubscription<T>(in, out) {

        //			@Override
        //			public void onSubscribe(Subscription inSub) {
        //				print()
        //				super.onSubscribe(inSub);
        //			}
        @Override
        public void onNext(T t) {
            log("onNext", t);
            super.onNext(t);
        }

        private void log(String string, Object t) {
            System.out.println(prefix + ": " + string + paramStr(t));
        }

        private String paramStr(Object t) {
            if (t != null) {
                return "(" + t + ")";
            }
            return "";
        }

        @Override
        public void onError(Throwable t) {
            log("onError", t.getMessage());
            super.onError(t);
        }

        @Override
        public void onComplete() {
            log("onComplete", null);
            // TODO Auto-generated method stub
            super.onComplete();
        }

        @Override
        protected void onRequest(long n) {
            log("request", n);
            // TODO Auto-generated method stub
            super.onRequest(n);
        }

        @Override
        protected void onCancel() {
            log("cancel", null);
            // TODO Auto-generated method stub
            super.onCancel();
        }
    };
}

[Buggy Hunk]
log("onError", t.getMessage());

[Patch]
log("onError", ExceptionUtil.getMessage(t));

[Demonstration 3]

[Buggy Method]
@Override
public void onEnter() {
    render();
    KeyController kc = new KeyController(map, player, mapVP);
    getViewport().addKeyListener(kc);
    MapBuilder.addVehicle(map, new Vector2(6, 1), "Donkey", ImageUtil.NULL_ASSET, 2);
    NonEquippableItem i = ItemFactory.getRandomNonEquippableItem();
    Pet en_puddles = new Pet(ImageUtil.EN_SKEL_S, "Puddles");
    en_puddles.addToInventory(i);
    map.addEntity(en_puddles, new Vector2(1, 3));
    map.getAvatarMovement().getEntity().addPet(en_puddles);
}

[Buggy Hunk]
KeyController kc = new KeyController(map, player, mapVP);

[Patch]
GameController kc = new GameController(map, player, mapVP);