[Demonstration 1]

[Buggy Method]
@Override
public Statement apply(Statement statement, Description description) {
    return new Statement() {

        @Override
        public void evaluate() throws Throwable {
            try {
                client = new EtcdClient();
                EtcdVersionResponse response;
                long startMillis = System.currentTimeMillis();
                while (true) {
                    try {
                        response = client.version();
                        break;
                    } catch (Throwable e) {
                        if ((System.currentTimeMillis() - startMillis) + waitUnit.toMillis(wait) > maxWaitUnit.toMillis(maxWait)) {
                            throw new IllegalStateException("etcd server not available", e);
                        }
                        logger.info("etcd not ready, waiting {} {}", wait, waitUnit);
                        waitUnit.sleep(wait);
                    }
                }
                logger.info("etcd server {} cluster {}", response.server, response.cluster);
                statement.evaluate();
            } finally {
                try {
                    client.close();
                } catch (Exception e) {
                    e.printStackTrace(System.err);
                }
            }
        }
    };
}

[Buggy Hunk]
public Statement apply(Statement statement, Description description) {

[Patch]
public Statement apply(final Statement statement, final Description description) {

[Demonstration 2]

[Buggy Method]
@Override
public void handleCommand(ChannelUID channelUID, Command command) {
    logger.error("Unexpected command for {}: {} - {}", getThing().getBridgeUID().getAsString(), channelUID, command);
}

[Buggy Hunk]
logger.error("Unexpected command for {}: {} - {}", getThing().getBridgeUID().getAsString(), channelUID, command);

[Patch]
logger.error("Unexpected command for HomeWorks Bridge: {} - {}", channelUID, command);

[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));