txid_visible_in_snapshot(PG_FUNCTION_ARGS)
{
	txid		value = PG_GETARG_INT64(0);
	TxidSnapshot *snap = (TxidSnapshot *) PG_GETARG_VARLENA_P(1);

	PG_RETURN_BOOL(is_visible_txid(value, snap));
}

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