VS Stop Working in Win7 by 奋斗者2011

#include <iostream>
#include <conio.h>
#include <list>

using namespace std;

template<typename T>
class A
{
public:
    class
    {
    public:
        virtual void test(){}
        int b;
        int c;
    };
};

int main()
{
    A<int> a;
    a.b = 0;
    cout<<sizeof(A<int>)<<endl;
    getch();
    return 0;
}

When I build this code, VS Stop working!