Scribble and examples can't read racket-prefs.rktd

[Deren Dohoda]

Hi Racketeers,

I'm going in absolute circles trying to understand what I might be doing wrong. I can use the command line scribble to generate html, which works fine except a problem showing #<pict> instead of an actual plot/pict image. And for that matter the package installs fine using a local install. But trying to run the scribble file in DrRacket always gives me errors like "cannot read racket-prefs.rkt" or other errors like "cannot reference an identifier without a definition" and sometimes it will give me errors like I have used (protect-out ...) somewhere but I am definitely not as I didn't even learn about this kind of provide until I saw this error.

Does anyone using Windows have experience getting rid of this message or have an idea what I might be doing wrong? I have a feeling that this message isn't actually the problem and it's something to do with sandbox somehow.

@(define this-eval (parameterize ((sandbox-output 'string)

                                  (sandbox-error-output 'string)

                                  (sandbox-memory-limit 100))

                     (make-evaluator 'racket/base #:requires '("main.rkt" "fit.rkt" plot/pict)

                                     (print-as-expression #f) 

                                     )))

Thanks,

Deren

[Matthew Flatt]

Sandboxed filesystem and unsafety access is too strict for many
purposes. For documentation, I recommend using a trusted sandbox by
wrapping the sanebox creation with
`call-with-trusted-sandbox-configuration`.

Matthew

[Deren Dohoda]

Thank you Matthew, that did resolve the problem, though I was unable to ever determine why I could not display a plot from plot/pict. It seems that it was somehow related to (sandbox-output 'string) which could never be coerced display a bitmap, pict, etc. Ultimately I just used (make-base-eval) instead and skipped the sandbox.

Deren

[Etan Wexler]

Matthew Flatt recommended “wrapping the sanebox creation”. Matthew, these saneboxes that you’ve invented seem to be just the devices that we’ve needed. We’d like an initial batch of 5000 saneboxes, as soon as you can manage, even if unwrapped. Please send the bill to 1500, Pennsylvania Avenue, Northwest, District of Columbia, 20220, United States of America. We appreciate your timely help!

[Tim Meehan]

Perhaps you meant 1600 Pennsylvania ave.?

> On Aug 16, 2020, at 13:46, Etan Wexler <racket-...@r-6.org> wrote:
>
> Matthew Flatt recommended “wrapping the sanebox creation”. Matthew, these saneboxes that you’ve invented seem to be just the devices that we’ve needed. We’d like an initial batch of 5000 saneboxes, as soon as you can manage, even if unwrapped. Please send the bill to 1500, Pennsylvania Avenue, Northwest, District of Columbia, 20220, United States of America. We appreciate your timely help!
>
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