Exception when the second list element size =1

[pdk5]

I also tried to write simple program to check the erase and it is working ok. This one i tried on cygwin. (The above program is in visual studio 19).

Basically, when the list has only one element, the erase will return the next element . i.e end() . When it-- is done on end () , what happens ?
In my previous program, i had posted, the erase is returning the begin() . Not sure why ?

int main()
{
        std::list<int> lst(1, 2);

        for(std::list<int>::iterator it = lst.begin(); it != lst.end(); it++)
        {
                std::cout << *it << "\t";

                if (*it == 2)
                {
                        it = lst.erase(it);
                        it--;
                }
         }


        std::cout << "After : ";

        for(std::list<int>::iterator it = lst.begin(); it != lst.end(); it++)
        {
                std::cout << *it << "\t";
        }
}