#vulnerable code 
                                @Override
    protected Statement withBefores(final FrameworkMethod method, final Object target, final Statement next) {
        Statement statement = next;
        for (int i = instances.size() - 1; i >= 0; i--) {
            final Object instance = instances.get(i);
            final TestClass tClass = new TestClass(instance.getClass());
            final List<FrameworkMethod> befores = tClass.getAnnotatedMethods(Before.class);
            statement = befores.isEmpty() ? statement : new RunBefores(statement, befores, instance);
        }
        return statement;
    } 
                            #location 5 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                @Override
    protected Statement withBefores(final FrameworkMethod method, final Object target, final Statement next) {
        Statement statement = next;
        for (int i = instances.size() - 1; i >= 0; i--) {
            final Object instance = instances.get(i);
            final TestClass tClass = TestClassPool.forClass(instance.getClass());
            final List<FrameworkMethod> befores = tClass.getAnnotatedMethods(Before.class);
            statement = befores.isEmpty() ? statement : new RunBefores(statement, befores, instance);
        }
        return statement;
    }