How to implement guide with std::shared_ptr and custom deleter causing unexpected memory leak in c++17
After trying multiple solutions online, I still can't figure this out. I'm deploying to production and I'm working with a memory leak when using `std::shared_ptr` with a custom deleter in my C++17 application. The question arises when I try to manage a dynamically allocated resource that requires a specific cleanup process. I have defined a custom deleter to ensure that the resource is properly released, but it seems that the memory is not being freed as expected. Here's an example of the code I'm working with: ```cpp #include <iostream> #include <memory> class Resource { public: Resource() { std::cout << "Resource acquired.\n"; } ~Resource() { std::cout << "Resource destroyed.\n"; } }; void customDeleter(Resource* res) { std::cout << "Custom deleter called.\n"; delete res; } int main() { std::shared_ptr<Resource> ptr(new Resource(), customDeleter); // Forget to reset or release the pointer below return 0; } ``` In the above code, I create a `std::shared_ptr` that owns a `Resource` instance. However, I haven't explicitly called `.reset()` or freed the resource in certain parts of my code, which I believe is leading to a memory leak. When I run this program, I see that the destructor for `Resource` is not being called, indicating that the resource is not being released. I've ensured that the `shared_ptr` is not being copied unnecessarily, and the custom deleter seems correct, but the resource still isn't being freed properly. I tried running it in a debugger with memory leak detection enabled, and it shows that the `Resource` instance is indeed being leaked. Are there any specific scenarios or best practices that I might be missing regarding the use of `std::shared_ptr` with custom deleters? Any help would be appreciated! For reference, this is a production microservice. Hoping someone can shed some light on this. I recently upgraded to Cpp 3.10. Am I approaching this the right way?