[Demonstration 1]

[Buggy Method]
@Override
public JsonElement serialize(ItemStack src, Type typeOfSrc, JsonSerializationContext context) {
    JsonObject jsonObject = new JsonObject();
    jsonObject.addProperty(NAME, src.getItem().getRegistryName().toString());
    jsonObject.addProperty(AMOUNT, src.func_190916_E());
    jsonObject.addProperty(META, src.getItemDamage());
    if (nbt && src.getTagCompound() != null)
        jsonObject.addProperty(NBT, src.getTagCompound().toString());
    return jsonObject;
}

[Buggy Hunk]
jsonObject.addProperty(AMOUNT, src.func_190916_E());

[Patch]
jsonObject.addProperty(AMOUNT, src.getCount());

[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]
@Override
public JsonElement serialize(EventRecord src, Type typeOfSrc, JsonSerializationContext context) {
    JsonObject eventJson = new JsonObject();
    SplunkJenkinsInstallation config = SplunkJenkinsInstallation.get();
    if (!config.isMetaDataInURLSupported()) {
        //need append metadata into event json object
        eventJson = (JsonObject) context.serialize(src.getMetaData());
    }
    eventJson.add("event", context.serialize(src.getMessage()));
    eventJson.addProperty("time", src.getTimestamp());
    return eventJson;
}

[Buggy Hunk]
if (!config.isMetaDataInURLSupported()) {

[Patch]
if (!config.isMetaDataInURLSupported(src.getEventType().needSplit())) {