声明字符串时内存泄漏

Question

I'm working on a C++ console application that is required to have 0 memory leaks. However, I'm very new to memory leaks and I wonder why this is already causing a memory leak, while there is barely any code:

int main()
{
    std::string httpResult;


    _CrtDumpMemoryLeaks();


    return 0;
}

This is the given memory leak in VS 2019:

Detected memory leaks!
Dumping objects ->
{93} normal block at 0x00000146FEB63BD0, 16 bytes long.
 Data: <x               > 78 FB 15 D6 13 00 00 00 00 00 00 00 00 00 00 00 
Object dump complete.

The only thing I'm doing is declaring a std::string. Why is that a memory leak?

Answer 1

Consider this:

int main()
{
    std::string httpResult;


    _CrtDumpMemoryLeaks();

    std::abort();

    return 0;
}

This code has a memory leak, because on calling abort destructors of objects with automatic storage duration are not called. _CrtDumpMemoryLeaks(); cannot look ahead to know if resources will be cleaned up after it is called. There is no memory leak in this code

int main()
{
 
    {
        std::string httpResult;
    }

    _CrtDumpMemoryLeaks();


    return 0;
}

(and _CrtDumpMemoryLeaks(); does not see any candidates for a memory leak.)