[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]
public boolean save(PrintWriter output) {
    try {
        output.println(this + " " + this.getBookee());
    } catch (Exception e) {
        return false;
    }
    return true;
}

[Buggy Hunk]
this + " " + this.getBookee()

[Patch]
this.getRow() + " " + this.getNumber() + " " + this.getBookee()

[Demonstration 3]

[Buggy Method]
private void getPhotos(JSONArray args, final CallbackContext callbackContext) throws JSONException {
    final CordovaWebView webView = this.webView;
    cordova.getThreadPool().execute(new Runnable() {

        @Override
        public void run() {
            // We discover every video / photo stored on the phone and ask the _data field, which is the full
            // path of the file
            discover(MediaStore.Video.Media.query(webView.getContext().getContentResolver(), MediaStore.Video.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.Video.Media.DATA }, null, null, MediaStore.Video.Media.DATE_MODIFIED + " ASC"));
            discover(MediaStore.Images.Media.query(webView.getContext().getContentResolver(), MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.Images.Media.DATA }, null, null, MediaStore.Images.Media.DATE_MODIFIED + " ASC"));
        }

        public discover(Cursor cursor) {
            while (cursor.moveToNext()) {
                for (int i = 0; i < cursor.getColumnCount(); i++) {
                    if (cursor.getColumnName(i).equals("_data")) {
                        Log.d(TAG, "Discovering " + cursor.getString(i));
                        // The callbackContext.success() method can only be called once
                        PluginResult result = new PluginResult(PluginResult.Status.OK, cursor.getString(i));
                        result.setKeepCallback(true);
                        callbackContext.sendPluginResult(result);
                    }
                }
            }
        }
    });
}

[Buggy Hunk]
public discover(Cursor cursor) {

[Patch]
private void discover(Cursor cursor) {