[Demonstration 1]

[Buggy Method]
@Test(timeOut = 500)
public void if_actualization_raises_an_exception_threads_other_than_the_originating_thread_receive_that_exception_wrapped_in_an_IllegalStateException() throws Exception {
    Lazy<String> lazy = Lazy.lazy(() -> delayedReturn(1000, "value"));
    Map<Thread, Throwable> uncaughtExceptions = new ConcurrentHashMap<>();
    Thread thread1 = new Thread(lazy::get);
    Thread thread2 = new Thread(lazy::get);
    thread1.setUncaughtExceptionHandler(uncaughtExceptions::put);
    thread2.setUncaughtExceptionHandler(uncaughtExceptions::put);
    thread1.start();
    Thread.sleep(50);
    thread2.start();
    Thread.sleep(50);
    thread1.interrupt();
    thread1.join();
    thread2.join();
    assertThat(uncaughtExceptions.get(thread2)).isInstanceOf(IllegalStateException.class).hasCauseInstanceOf(InterruptedException.class);
}

[Buggy Hunk]
Lazy<String> lazy = Lazy.lazy(() -> delayedReturn(1000, "value"));

[Patch]
Lazy<String> lazy = Lazy.lazy(() -> unsafeDelayedReturn(1000, "value"));

[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]
@Test
public void testValidGroupRuleWithValidGroupKeyButNullResult() {
    validateExceptionRule(new ValidGroupRuleWithValidGroupKey(null));
}

[Buggy Hunk]
validateExceptionRule(new ValidGroupRuleWithValidGroupKey(null));

[Patch]
validateRule(new ValidGroupRuleWithValidGroupKey(null));