Re: [MIT-Scheme-users] ref error

[David Gray]

This could have been the case as I was messing around in the repl. However when 
I tried to find the simplest case to replicate
the error I restarted scheme, did a load, then got the error. Then I restarted 
again, pasted the code from the file to *scheme*
where everything was OK. Another thing that was strange was that I could do 
(ref ‘(1 2 3 4 5) 2) in *scheme* after the error, as it
was only the loaded function that gave the error.   

> On 2 Nov 2017, at 00:11, Matt Birkholz <address@hidden> wrote:
> 
> On Wed, 2017-11-01 at 23:59 +0200, David Gray wrote:
>> This is the scmutils generic ref. When I replace the generic ref with
>> vector-ref it works ok, I just thought this error was strange, the
>> only difference being loading the file or just using it from the
>> repl.
> 
> There is this "gotcha" with the *scheme* buffer:
> 
>    After examining an error, whether or not you choose to enter the
>    debugger, you should type "C-c C-c" to get back to the top level.
>    This is important because if you don't the evaluations you
>    subsequently perform may refer to the error state rather than to the
>    state you intended.  [scmutils/manual/beginner.txt]
> 
> It sounds like the wrong environment was used somewhere.