[C++知识库]C++对象析构时报错的一种情况：子类弑父

#include <iostream>
using namespace std;
class base;
base* b = nullptr;
class base {
public:
    base* m_b = nullptr;
    base() {
        m_b = this;
        b = this;
    }
    ~base() {
        cout << "base 被析构\n";
    }
};
class child :public base{
public:
    child() {}
    ~child() {
        delete m_b;//子类弑父
        cout << "child 被析构\n";
    }
}
;
class child2 :public base {
public:
    child2() {}
    ~child2() {
        cout << "child 被析构\n";
    }
};

int main()
{
    //子类弑父
    child* c = new child();
    delete c;

    //弑父之仇
    child2* c2 = new child2();
    delete b;
    delete c2;
    std::cout << "Hello World!\n";
}

以上两种情况都会造成

?