circle_center(PG_FUNCTION_ARGS)
{
	CIRCLE	   *circle = PG_GETARG_CIRCLE_P(0);
	Point	   *result;

	result = (Point *) palloc(sizeof(Point));
	result->x = circle->center.x;
	result->y = circle->center.y;

	PG_RETURN_POINT_P(result);
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.