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I'm having a problem when I want to create a convex hull from a vector of
points that I have no idea how to fix. When I use this code below, the program
enter on the function CGAL::convex_hull_3 and doesn't come out. 

ifstream file("resources/geometry.txt");
vector<Point> points;
Field_number x, y, z;

if(file.is_open()){
        while (!file.eof()) {
                file >> x >> x >> y >> z;
                Point point(x, y, z);
                points.push_back(point);
        }
}

CGAL::Object object;

CGAL::convex_hull_3(points.begin(), points.end(), object);

But, if I just cast the numbers read to int [ Point point((int)x, (int)y,
(int)z); ], the code works fine.

Does anybody know where I'm making the mistake?

Thank you all!