[Demonstration 1]

[Buggy Method]
@Override
public KeyValue<Long, Long> transform(final Long key, final Long value) {
    int maxPartitionNumber = maxPartitionNumberSeen.get(hashCode());
    maxPartitionNumber = Math.max(maxPartitionNumber, context.partition());
    maxPartitionNumberSeen.put(hashCode(), maxPartitionNumber);
    if (maxPartitionNumber == 1 && injectError) {
        throw new RuntimeException("Injected test exception.");
    }
    if (++processedRecords == 10) {
        context.commit();
        commitRequested.incrementAndGet();
    }
    if (state != null) {
        Long sum = state.get(key);
        if (sum == null) {
            sum = value;
        } else {
            sum += value;
        }
        state.put(key, sum);
        context.forward(key, sum);
        return null;
    }
    return new KeyValue<>(key, value);
}

[Buggy Hunk]
if (++processedRecords == 10) {

[Patch]
if (++processedRecords % 10 == 0) {

[Demonstration 2]

[Buggy Method]
public boolean isGameOver() {
    if (isStarted()) {
        if (werewolfSize() == 0) {
            return true;
        } else if (civilianSize() == 0) {
            return true;
        } else if (civilianSize() == 1 && werewolfSize() == 1) {
            return true;
        }
        return false;
    }
    return false;
}

[Buggy Hunk]
}else if(civilianSize() == 1 && werewolfSize() == 1){

[Patch]
}else if(civilianSize() == werewolfSize()){

[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));