[Demonstration 1]

[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 2]

[Buggy Method]
private void buildLayout() {
    HorizontalLayout actions = new HorizontalLayout(filter);
    actions.setWidth("100%");
    filter.setWidth("100%");
    actions.setExpandRatio(filter, 1);
    TabSheet lists = new TabSheet();
    lists.setHeight(100.0f, Unit.PERCENTAGE);
    lists.addStyleName(ValoTheme.TABSHEET_FRAMED);
    lists.addStyleName(ValoTheme.TABSHEET_PADDED_TABBAR);
    VerticalLayout tab1 = generateTab(requestList);
    VerticalLayout tab2 = generateTab(acceptedList);
    VerticalLayout tab3 = generateTab(rejectedList);
    lists.addTab(tab1, "Requests");
    lists.addTab(tab2, "Accepts");
    lists.addTab(tab3, "Rejects");
    VerticalLayout left = new VerticalLayout(actions, lists);
    left.setSizeFull();
    lists.setSizeFull();
    left.setExpandRatio(lists, 1);
    HorizontalLayout mainLayout = new HorizontalLayout(left, requestForm);
    mainLayout.setSizeFull();
    mainLayout.setExpandRatio(left, 1);
    setContent(mainLayout);
}

[Buggy Hunk]
HorizontalLayout mainLayout = new HorizontalLayout(left, requestForm);

[Patch]
HorizontalLayout mainLayout = new HorizontalLayout(left, requestForm, editForm);

[Demonstration 3]

[Buggy Method]
private Component buildSplitPanel() {
    splitPanel = new HorizontalSplitPanel();
    splitPanel.setSizeFull();
    splitPanel.setSplitPosition(50, Unit.PERCENTAGE);
    splitPanel.setLocked(true);
    splitPanel.setFirstComponent(buildLeftPanel());
    splitPanel.setSecondComponent(buildProfilePanel());
    return splitPanel;
}

[Buggy Hunk]
splitPanel.setSplitPosition(50, Unit.PERCENTAGE);

[Patch]
splitPanel.setSplitPosition(300, Unit.PIXELS);