I decided to build Racket CS from github and it works. Thanks!
On Thursday, 5 March 2020 23:42:34 UTC+5, Matthew Flatt wrote:
>
> I've pushed a repair for the development version of Racket CS. The
> problem was related to computing a hash code of an object (i.e., an
> instance of a class).
>
> If you need a workaround to keep using the released version of Racket
> CS, it may involve supplying explicit equality and hash-code functions
> for your `Equal%` class.
>
> Thanks for the report!
>
> At Thu, 5 Mar 2020 04:07:48 -0800 (PST), hashim muqtadir wrote:
> > Hello,
> >
> > I have some code that uses my library, "remap". It previously used to
> work,
> > but in Racket CS 7.6, it fails saying "invalid memory reference. Some
> > debugging context lost".
> > Clicking the crosses in DrRacket gives this backtrace:
> >
> > invalid memory reference. Some debugging context lost
> >
> > /home/hashim/racket/collects/racket/private/for.rkt: 2020:10
> > (hash-set table key val
> >
> > /home/hashim/racket/collects/racket/private/for.rkt: 1503:16
> > (let-values ([(fold-var ...) (let () expr1 expr ...)])
> > (values fold-var ...)]
> >
> > /home/hashim/racket/collects/racket/private/for.rkt: 1543:38
> > #'(let-values ([(fold-var ...)
> > (for/foldX/derived
> > [orig-stx inner-recur nested? #f ()]
> > ([fold-var
> fold-var]
> > ...)
> > next-k break-k
> > final?-id
> > rest expr1 .
> body)])
> > (if (and post-guard ... (not
> > final?-id))
> > (for-loop fold-var ...
> loop-arg
> > ... ...)
> > next-k)))
> >
> > My tests, that use the library functions, seem to work, but for some
> reason
> > when I'm building a hash from my structures.
> > The file found
> >
> https://gitlab.com/hashimmm/remap/-/blob/96f1db518c4d9bb8f2da44ae403ab50332212c
>
> > 9c/issue.rkt
> > is present in the "issue" branch in my repo and running this file in
> > DrRacket will reproduce the problem.
> >
> > From the file, removing the measurement-units table definition and its
> > references fixes the problem (the memory error then no longer occurs).
> >
> > Any ideas what's up with this? I'd be happy to provide more information
> to
> > narrow this down, but I'm not really sure how.
> >
> > --
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>
> > 2709%40googlegroups.com.
>
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