No, my change does not solve that, but I'll try looking into it. The
issue is in how recursive contracts are generated.



On Wed, Aug 8, 2012 at 12:11 PM, Sam Tobin-Hochstadt <sa...@ccs.neu.edu> wrote:
> I think this will be fixed soon, once I merge Eric's pull request
> https://github.com/plt/racket/pull/121 .
>
> Sam
>
> On Wed, Aug 8, 2012 at 3:00 PM, Erik Silkensen <eriksilken...@gmail.com> 
> wrote:
>> Hi,
>>
>> The code
>>
>> #lang typed/racket
>>
>> (define-type IntList (Rec List (Pair Integer (U List Null))))
>> (define-predicate int-list? IntList)
>>
>>> (int-list? '(1 2 3))
>>
>> gives the runtime error:
>>
>> recursive-contract: expected a flat contract or a value that can be coerced 
>> into one, got #<impersonator-recursive-contract>
>>
>> Is there a way to generate a predicate for a type like this?
>>
>> Thanks,
>> Erik
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>
>
>
> --
> sam th
> sa...@ccs.neu.edu
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