pt_contained_poly(PG_FUNCTION_ARGS)
{
	Point	   *p = PG_GETARG_POINT_P(0);
	POLYGON    *poly = PG_GETARG_POLYGON_P(1);

	PG_RETURN_BOOL(point_inside(p, poly->npts, poly->p) != 0);
}

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