stl doesn't like arrays.cpp

#include <vector>
#include <cstring>
#include <iostream>

using namespace std;

struct f {
    char x[16];
};

f& padded_string(char* y) {
    cout << y << endl;
    f* o;
    o = new f;
    cout << o << endl;
    (void) strncpy(o->x, y, sizeof o->x);
    return *o;
};

int main(void) {
    f oo;
    oo = padded_string("dsdf");
    vector<f> s;
    s.push_back(oo);
    return 1;
};