[racket] getting some weird toplevel values from zo-parse

I don't remember whether it was me or someone else, but it's fixed in
the latest docs:

 Represents a “prefix” that is pushed onto the stack to initiate
 evaluation. The prefix is an array, where buckets holding the values
 for toplevels are first, then the buckets for the stxs, then a bucket
 for another array if stxs is non-empty, then num-lifts extra buckets
 for lifted local procedures.

At Tue, 24 May 2011 14:36:15 -0400, Danny Yoo wrote:
> >> which appear to index into offset 83 and 82 of the prefix.  However,
> >> the prefix is only supposed to have space for 7 num-lifts, plus 68
> >> toplevels, plus 1 more bucket to hold syntax.
> >
> > No, there's a bucket for each syntax object (plus the one bucket for
> > having any syntax objects at all), which is another 8 buckets.
> 
> Ok, I'm definitely confused then.  Here's what's in zo-parse's documentation:
> 
>     
> http://docs.racket-lang.org/raco/decompile.html#(def._((lib._compiler/zo-parse..
> rkt)._prefix))
> 
>     """Represents a “prefix” that is pushed onto the stack to initiate
> evaluation. The prefix is an array, where buckets holding the values
> for toplevels are first, then a bucket for another array if stxs is
> non-empty, then num-lifts extra buckets for lifted local
> procedures."""
> 
> 
> The documentation makes it sound like the number of buckets is:
> 
>     (+ number-of-toplevels
>         (if (> number-of-syntaxes 0) 1 0)
>         number-of-lifts)
> 
> But if I understand you correctly, you're saying that it really should be:
> 
>     (+ number-of-toplevels
>         number-of-syntaxes
>         (if (> number-of-syntaxes 0) 1 0)
>         number-of-lifts)
> 
> 
> And that the layout should be toplevels, followed by syntax buckets,
> followed by lift buckets.  Is that right?