[plt-scheme] mzscheme behaviour differs between debian and gentoo

fschwidom at BigBix.localdomain wrote:
> Hi,
>
> the script:
>
>   
>> (define a (list 1 2))
>> (define b (list 3 4))
>> (append! a b)
>>     
> (1 2 3 4)
>   
Are you sure you invoked append! and not append? append! has been moved 
out of the core so you can't use it normally. What version of mzscheme 
are you running?