#vulnerable code 
                                protected void starting(Class<?> testClass, String testName) {
        PARAMETERS_THREAD_LOCAL.set(sharedMutator.getEffectiveParameters(testClass, testName,
                getDriverLifecycle()));

        SharedWebDriver sharedWebDriver;

        try {
            sharedWebDriver = SharedWebDriverContainer.INSTANCE.getSharedWebDriver(
                    PARAMETERS_THREAD_LOCAL.get(), null, this::newWebDriver, getConfiguration());
        } catch (ExecutionException | InterruptedException e) {
            this.failed(null, testClass, testName);

            String causeMessage = getCauseMessage(e);

            throw new WebDriverException("Browser failed to start, test [ " + testName + " ] execution interrupted."
                    + (isEmpty(causeMessage) ? "" : "\nCaused by: [ " + causeMessage + "]"), e);
        }

        setTestClassAndMethodValues(PARAMETERS_THREAD_LOCAL, TEST_CLASS, TEST_METHOD_NAME);
        initFluent(sharedWebDriver.getDriver());
    } 
                            #location 8 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                protected void starting(Class<?> testClass, String testName) {
        PARAMETERS_THREAD_LOCAL.set(sharedMutator.getEffectiveParameters(testClass, testName,
                getDriverLifecycle()));

        SharedWebDriver sharedWebDriver = getTestDriver(testClass, testName,
                this::newWebDriver, this::failed,
                getConfiguration(), PARAMETERS_THREAD_LOCAL.get());
        setTestClassAndMethodValues(PARAMETERS_THREAD_LOCAL, TEST_CLASS, TEST_METHOD_NAME);
        initFluent(sharedWebDriver.getDriver());
    }