Visual Studio 2010 C++ runtime error

Question

I came across strange behavior in Visual Studio 2010 C++ compiler. Following code compiles but throws "Debug assertion failed" after execution with message:

"_BLOCK_TYPE_IS_VALID(pHead->nBlockUse)"

Compiles and runs smoothly under GCC. Is it my fault?

#include <iostream>
#include <vector>


using namespace std;

typedef unsigned int uint;


class Foo {
    vector<int*> coll;
public:

    void add(int* item) {
       coll.push_back(item);
    }

    ~Foo() {
        for (uint i = 0; i < coll.size(); ++i) {
            delete coll[i];
            coll[i] = NULL;
        }
    }
};

int main()
{
   Foo foo;
   foo.add(new int(4));
   Foo bar = foo;

   return 0;
}