on_ps(PG_FUNCTION_ARGS)
{
	Point	   *pt = PG_GETARG_POINT_P(0);
	LSEG	   *lseg = PG_GETARG_LSEG_P(1);

	PG_RETURN_BOOL(on_ps_internal(pt, lseg));
}

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