Should DNS clients be worried about the DNS message compression in which pointers may point to another pointer instead of label name? Although doing so seems to be unambiguous, there is not talk about it in the rfc I am referring to. 

From the DNS rfc1035: 

> 
> The compression scheme allows a domain name in a message to be
>  represented as either:
> 
> 
> * a sequence of labels ending in a zero octet
> * a pointer
> * a sequence of labels ending with a pointer
> 
> 
> 

Can DNS clients expect such behaviour in the server response?