#include <iostream>
#include <memory>

using namespace std; 

class Boom{
    private:
        int no;
    public:
        Boom():no(10){
            cout << "Create Boom 1..." << endl;
        }
        Boom(int a):no(a)
        {

            cout << "Create Boom 2..." << endl;
        };
        ~Boom(){
            cout << "Destructing.." << " " << no << endl;
        };
};

class BoomPoiner {
    private:
        Boom* obj;
    public:
        BoomPoiner(){
            cout << "Create pointer..." << endl;
        }
        BoomPoiner operator=(Boom *obj){
            this->obj = obj;
            return *this;
        }
        ~BoomPoiner(){
            cout << "Delete pointer obj..." << endl;
            delete obj;
        }
};

void makePointer(){
    //std::unique_ptr<Boom> boom = std::make_unique<Boom>(1);
    //Boom* boom2 = new Boom(2);
    Boom* boom = new Boom();
    BoomPoiner ptr;
    ptr = boom;
    cout << "out func" << endl;
    return;
}


int main(){
    makePointer();
    return 0;
}

When I tried to do something like above, it will keep call the destructor of BoomPointer. I only have created one BoomPointer instance and one Boom instance. Theoretically, it should call only once for the destructor.

The result:
Create Boom 1…

Create pointer…

Delete pointer obj…

Destructing.. 10

out func

Delete pointer obj…

Destructing.. 0

main(59838,0x1eaf39b40) malloc: Double free of object 0x100204120

main(59838,0x1eaf39b40) malloc: *** set a breakpoint in

malloc_error_break to debug