Debug assertion failed in tree implementation

Hi,
I would be grateful if somebody could explain why following code
causes assertions failures:

//#include "stdafx.h" //neccessary if you compile with VC++ 2008
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <vector>
#include "stdio.h"
using namespace std;

class A {
public:
    A() {}
    A(int currentDepth, int depth) { cout << currentDepth << " " << depth
<< "\n"; }
    vector<A>* vecA;
};

vector<A> recursion(int fixedDepth) {
    fixedDepth--;
    getchar();
    cout << "We are on level: " << fixedDepth << "\n";
    vector<A> vecA;
    int Max=rand() % 5+1;
    for(int i=0; i<Max; i++) {
        A a;
        vecA.push_back(a);
    }
    vector<A>::iterator it;
    for(it=vecA.begin(); it!=vecA.end(); it++) {
        if(fixedDepth==0) {
            if(it==vecA.end()) break;
            it++;
            continue;
        }
        it->vecA=new vector<A>;
        *it->vecA=recursion(fixedDepth);
    }
    return vecA;
};

int main()
{
    srand((unsigned)time(0));
    vector<A> a=recursion(2);
    return 0;
}

It is interesting that if one doesn't use random numbers but in for
loop there is single, known before run-time number instead of MAX it
seems to work nicely. My compiler is Visual C++ 2008.

Thanks in advance for responses,
Greetings.