lambda – C 0x闭包的未定义行为：I

#include <iostream>
#include <functional>     // std::function
#include <vector>        // std::vector
#include <algorithm>    // std::for_each

int main(){

    auto adder = [](int x) {
        return [&](int y) { 
            return x+=y; 
        }; 
    };

    std::vector < std::function<int(int)> > vec;

    vec.push_back(adder(1));
    vec.push_back(adder(10));

    std::for_each(vec.begin(),vec.end(),[](std::function<int(int)> f){std::cout << f(33) << " ";});
    std::cout << std::endl;
}

一个期望整数34和43 43和76,但gcc 4.6.0产生“内部编译器错误：分段错误”.代码有什么问题？

编辑：here讨论了其他几个例子.