std::remove 不起作用

我的测试程序的目标是擦除一个简单的字符串向量中的单元格，如下所示.程序失败(分段错误).

The goal of my test program is to erase a cell in a simple vector of strings like below. The program fail (segmentation fault).

static void display(std::vector<std::string> const &vec)
{
    std::vector<std::string>::const_iterator It = vec.begin();
    for (; It != vec.end(); ++It)
        std::cout << *It << " ";
    std::cout << std::endl;
}


int         main(void)
{
    std::vector<std::string> vec;
    size_t  index = 0;

    vec.push_back("Toto");
    vec.push_back("Titi");
    vec.push_back("Tata");
    vec.push_back("Tutu");

    display(vec);

    std::vector<std::string>::iterator It = vec.begin();

    for (size_t idx = 0; It != vec.end(); ++It, idx++)
        if (!(*It).compare("Tutu"))
            index = idx;

    vec.erase(std::remove(vec.begin(), vec.end(), index), vec.end()); //Segmentation fault

    display(vec);

    getchar();
    return (0);
}

有人可以帮我吗?预先感谢您的帮助.

Does anyone can help me? Thanks in advance for your help.