#include <stdio.h>
#include <vector>

class Thing{
 public: ~Thing() { printf("~Thing is going away\n"); }
};

class BASE {
 public:
//  virtual ~BASE() {}
};


class DER : public BASE {
public:
  DER() { v.push_back(Thing()); }
  std::vector<Thing> v;
};

int main() {
 BASE* b = new DER();
 printf("Now deleting the container. If you don't see a ~Thing below, memory is leaking\n");
 delete b;

return 0;
}