#include <iostream>
 
struct SomeNonTrivialType {
    SomeNonTrivialType() { std::cout << "SomeNonTrivialType()" << std::endl; }
    ~SomeNonTrivialType() { std::cout << "~SomeNonTrivialType()" << std::endl; }
};
 
class A {
private:
    // деструктор пустой, нахуй он нужен? ;)
    // virtual ~A() {}
    int a;
};
 
class B : public A {
private:
    SomeNonTrivialType b;
};
 
int main() {
    A *a = new B;
    delete a;
    return 0;
}

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