[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]
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
    String modUrlCheck = url.toString();
    if (modUrlCheck.equals("http://www.m.ptuexam.com/frmAnnouncements.aspx") || modUrlCheck.equals("http://www.m.ptuexam.com/LoginMe.aspx") || modUrlCheck.equals("http://www.m.ptuexam.com/frmAnnouncements.aspx#/frmResultTabulation.aspx") || modUrlCheck.equals("http://www.m.ptuexam.com/frmResultTabulation.aspx")) {
        friend_result_button.setVisibility(View.GONE);
    } else {
        friend_result_button.setVisibility(View.VISIBLE);
    }
    super.onPageStarted(view, url, favicon);
}

[Buggy Hunk]
String modUrlCheck = url.toString();

[Patch]
modUrlCheck = url.toString();

[Demonstration 3]

[Buggy Method]
private void showSchedule(String group) {
    changeGroupLayout.setVisibility(View.GONE);
    tabLayout.setVisibility(View.VISIBLE);
    tabSchedule.setVisibility(View.VISIBLE);
    ((AppCompatActivity) getActivity()).getSupportActionBar().setDisplayShowTitleEnabled(false);
    spinnerWeekNumber.setVisibility(View.VISIBLE);
    adapter = new ScheduleTabFragmentAdapter(getContext(), getScheduleByWeek(getScheduleByGroup(schedules, group), spinnerWeekNumber.getSelectedItem().toString()));
    adapter.notifyDataSetChanged();
    viewPager.setAdapter(adapter);
    tabSchedule.setupWithViewPager(viewPager);
}

[Buggy Hunk]
((AppCompatActivity) getActivity()).getSupportActionBar().setDisplayShowTitleEnabled(false);

[Patch]
((AppCompatActivity) getActivity()).getSupportActionBar().setTitle(group);