Memory leak with shared_ptr https://renyili.org/post/smart_ptr_mem_leak/

demo.cpp

#include <stdio.h>
#include <memory>
#include <string.h>
#include <vector>

using namespace std;

struct Data
{
    char data[1000];
    
    ~Data() { }
};

struct Father
{
    Father() {}
    // virtual 
    ~Father() { }
};

struct Child : Father
{
    Child() : Father() {}
    ~Child() {cout << "Child destructor" << endl;}
    void create()
    {
        weak_ptr = std::make_shared<Data>();
    }
    std::weak_ptr<Data> weak_ptr;
};

int main(int, char **)
{
    std::vector<Father *> vec;
    for (int i = 0; i < 10; i++)
    {
        Child *child_ptr = new Child();
        child_ptr->create();
        vec.push_back(child_ptr);
    }
    
    for (auto &itr : vec)
    {
        delete itr;
    }

    return 0;
}