[Demonstration 1]

[Buggy Method]
private void initialize() {
    JFrame frame = new JFrame();
    frame.setBounds(100, 100, 326, 147);
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    frame.getContentPane().setLayout(null);
    lblLevel = new JLabel("Level :");
    lblLevel.setFont(new Font("Arial Black", Font.BOLD, 12));
    lblLevel.setBounds(34, 52, 57, 14);
    frame.getContentPane().add(lblLevel);
    comboLevel = new JComboBox();
    comboLevel.setBounds(90, 50, 46, 20);
    frame.getContentPane().add(comboLevel);
    btnSaveLevel = new JButton("Save");
    btnSaveLevel.setFont(new Font("Arial Black", Font.PLAIN, 11));
    btnSaveLevel.setBounds(160, 48, 89, 23);
    frame.getContentPane().add(btnSaveLevel);
    frame.setTitle("Level Editor");
    frame.setVisible(true);
}

[Buggy Hunk]
JFrame frame = new JFrame();

[Patch]
frame = new JFrame();

[Demonstration 2]

[Buggy Method]
public static void main(final String[] args) {
    new Pippo(new PippoHelloWorldApplication()).start();
    ;
}

[Buggy Hunk]
new Pippo(new PippoHelloWorldApplication()).start();;

[Patch]
new Pippo(new PippoHelloWorldApplication()).start();

[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));