[racket] racket/serialize example in The Racket Guide does not work

I get this too, but only in the REPL. If I run it in a module, it works fine. Seems like a bug…?

> On Jan 31, 2015, at 19:32, fyooo <fyooo at foxmail.com> wrote:
> 
> I followed the guide in http://docs.racket-lang.org/guide/serialization.html
> 
> > (require racket/serialize)
> > (serializable-struct posn (x y) #:transparent)
> > (deserialize (serialize (posn 1 2)))
> . . dynamic-require: name is not provided
>   name: 'deserialize-info:posn-v0
>   module: #<resolved-module-path:'anonymous-module>
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