AVG Access Warning rejected when starting a simple C ++ program

Question

I run a very simple C ++ program:

#include <list>
#include <vector>

int main(int argc, char **args) {

}

I go to the command line and compile and run:

g++ whatever.cpp
a.exe

This usually works fine. It compiles fine, but when I run it, it says Access Denied and AVG pops up, telling me that a threat has been detected Trojan Horse Generic 17.CKZT. I tried again to compile using Microsoft Compiler (cl.exe) and it runs fines. So I came back and added:

#include <iostream>

compiled using g ++ and running. This time it worked fine.

So can someone tell me why AVG will report the empty main method as a Trojan horse, but if the iostream header is turned on it doesn't?

UPDATE:

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Answer 1

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Answer 2

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