C++ STL list functions segfaulting with empty list

Question

I have a list of pointers as a member of a class. I instantiate that class, and various functions such as size() and empty() fail with a segfault when the list is empty. W

Answer 1

int Player::addToInv(Thing& t) {
if (inventory.size() <= 52) {
    inventory.push_back(&t);
} else {
    shiplog("Cannot add to inventory, 52 item limit reached",10);
    return 0;
}

}

Thing is passed by reference, but then its address is passed to inventory.push_back(). Try just passing 't'.