boost::geometry union & difference &r-tree error

I want to "union" or "clipper" two rectangle but I always get the wrong output.
so I used "fsanitize=undefined" command to check my code, and it report a overflow error.
I think the all points of the tow rectangle in the integer range,so my question is if the points range
will be "long long" How do I define the type of point_xy to make sure it doesn't overflow when I used the function "union_" "difference" , and some time I used boost r-tree will also get the error.