[plt-scheme] nested mutable lists in R6RS

I am working with the following, and uncommenting no difference

(module cars scheme
  ;  (require scheme/mpair)
  ;  (require rnrs/mutable-pairs-6)
 
  (define  x '(1 2 3))
  ;  (set-car! x (cddr x))
  ;  (set-mcar! x (cddr x))
  )

LordGeoffrey wrote:
> My pardon,  i cant get mutable lists, srfi-1 and R6RS to execute in 
> one file.
> I cant use mxxx procs on lists that srfi-1 will operate on.
>
>
> Noel Welsh wrote:
>> On Fri, Jun 12, 2009 at 11:46 AM,
>> LordGeoffrey<lordgeoffrey at optushome.com.au> wrote:
>>  
>>> Is it possible to have nested mutable lists in R6RS?
>>>     
>>
>> Yes, a list can contain any value, including another list.
>>
>>  
>>> I ask because i have a nested list structure and i want to change the
>>> occasional value in the list, and possibly even restructure the tree.
>>>
>>> As part of that i like using find-tail and other common list functions.
>>> I assume i am merely including the wrong combination of libraries.
>>>
>>> Any advice?
>>>     
>>
>> You don't actually mention any issues you're having, so I can't 
>> really say more.
>>
>> N.
>>
>>   
>
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