Re: [Chicken-hackers] strange error message, please help with interpretation

[Jörg F . Wittenberger]

On Mar 8 2013, Moritz Heidkamp wrote:

> Hi Jörg,
>
> Jörg F. Wittenberger <address@hidden> writes:
> > So how would I interpret this message.  As far as I can see, this
> > tells me that somehow a typecheck failed on a (struct <uri>)
> > testing it to be a (struct <uri>) -- which would have been supposed
> > to succeed.
> >
> > Am I missing something????
>
> I think your assessment is correct. Unfortunately, I don't have the
> slightest clue what might be the cause of this either. I assume you are
> not using ##sys#make-structure or anything to create instances of that
> record type but only the "proper" constructor?

Yes.  Even more restritive.  The structure is defined like this
(don't argue about correctness or whatever):

(define-record-type <uri>
 (%make-uri scheme authority path query fragment)
 uri?
 (scheme uri-scheme)
 (authority uri-authority)
 (path uri-path)
 (query uri-query)
 (fragment uri-fragment))

and the only constructor exported from the module is:

(define (make-uri scheme authority path query fragment)
 (%make-uri (if (string? scheme) (string->symbol scheme) scheme)
             authority path query fragment))

Also: the code is pulled into the module via "include" and
otherwise shared with rscheme.  -->  Any use of a "#" character
in the code would make it unreadable to rscheme.

((This double-checking is one of the more important reasons,
why I have split my code into implementation dependent sections
and protable parts.))


I really don't see a way, how I could accidentally mess with it.

But: once upon a time I'm abserving strange things in the
chicken process.  I can't blame chicken so far.  Though I
tend to be tough on me - and still don't see where my code
could fail there.  --  Which is still not saying that there's
nu bug lurking on my side.


/Jörg




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