Destructor not being called with smart or raw pointer

Continuing from a previous question:

On this code, the destructors for Apple and Fruit don't get called at all. I have std::cerr statements in both and there's some clean up code in Apple that doesn't run. I thought calling delete was enough? Am I doing RAII correctly? I've also replaced the raw pointer with std::unique_ptr and the same result.

int32_t Fruit::frutificate(const Settings& settings) {
  Fruit *listener;
  if (settings.has_domain_socket()) {
    listener = new Apple(settings);
  } else {
    listener = new Orange(settings);
  }
  int r = uv_run(listener->loop, UV_RUN_DEFAULT);
  delete listener;
  return r;
}

Update: All classes have virtual destructors.