lifetime

The following piece of code causes a lifetime warning about returning a dangling pointer:

class PrivateKey {
   // A random class that models a private key.
};

PrivateKey* getPrivateKey() {
    return std::unique_ptr<PrivateKey>(new PrivateKey()).release();
}

See in Godbolt: https://godbolt.org/z/fJyWl4

Is this correct? If we call release on a unique_ptr, I'd assume t