#fixed code
                                @Override
    public BrowserManager useTaobaoMirror() {
        return useTaobaoMirror("wdm.operaDriverTaobaoUrl");
    }
#vulnerable code 
                                @Override
    public BrowserManager useTaobaoMirror() {
        String taobaoUrl = null;
        try {
            taobaoUrl = getString(getString("wdm.operaDriverTaobaoUrl"));
            driverUrl = new URL(taobaoUrl);
        } catch (MalformedURLException e) {
            String errorMessage = "Malformed URL " + taobaoUrl;
            log.error(errorMessage, e);
            throw new WebDriverManagerException(errorMessage, e);
        }
        return instance;
    } 
                            #location 12 
                            #vulnerability type THREAD_SAFETY_VIOLATION