#include <cassert>
#include <memory>

struct Bundle {
    static int alive;
    int value;
    Bundle() : value(42) { ++alive; }
    ~Bundle() { --alive; }
};
int Bundle::alive = 0;

int main() {
    auto owner = std::make_shared<Bundle>();
    std::shared_ptr<int> field(owner, &owner->value);
    assert(owner.use_count() == 2);
    owner.reset();
    assert(Bundle::alive == 1);
    assert(*field == 42);
    field.reset();
    assert(Bundle::alive == 0);
}