[plt-scheme] access from an uncertified context to unexported variable from module

From: Jens Axel Soegaard (jensaxel at soegaard.net)
Date: Wed Oct 29 14:57:37 EDT 2008

Matthew Flatt wrote:
> At Wed, 29 Oct 2008 18:14:21 +0100, Jens Axel Soegaard wrote:
>> I am trying to eliminate the following error:
>>   compile: access from an uncertified context to unexported variable 
>> from module:
>>   "/Applications/PLT Scheme Full 
>> v4.1.0.3/collects/srfi/42/extra-generators.scm" in: indices->list
>> Error messages says indices->list is unexported, but it is in fact 
>> provided from the module
>> in which it is defined.
> Is that different from the one in SVN? In the SVN version,
> `indices->list' doesn't seem to be exported.
Yikes. I have been hacking on an old version ( Sigh.
> I assume that something takes apart the `:do'. 
> In the SVN version of
> SRFI 42, I also see that "expansion.scm" defines an expander that
> parallels the normal macro expander. The expander in "expansion.scm"
> should probably manage certificates, just the the usual expander. Also,
> that management should treat `:do' as transparent for certificates, so
> that it can be pulled apart without forcing `indices->list' to be
> exported. An example alternate expander is in `scheme/private/for'
> (naturally), which does that sort of thing for its own `:do-in'.

I'll take a look, thanks for the pointer.

Jens Axel Søgaard

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