int List::size() {
    // FIXME: implement this method to return the number of Nodes in the list
    int listSize = 0;
    Node* temp = first;
    while (temp != nullptr) {
        listSize++;
        temp = temp->next;
    }
    return listSize;
}

I’m implementing this linked list class method to calculate the number of nodes in the list. When I execute the program, I return the correct number of nodes however I also get a segfault and I’m curious if there’s something wrong in this method.