The GC's printer for `dump-memory-stats` is broken on Windows. It
breaks in different ways depending on the compiler used to build Racket
and for 32-bit vs. 64-bit.

I've pushed a repair for the next snapshot build --- at least for the
Utah snapshot, which uses MSVC. I'll probably have to investigate more
to make sure the release and the Northwestern snapshot build work.

At Thu, 2 Jun 2016 05:24:42 -0700 (PDT), Alex Harsanyi wrote:
> I'm trying to use dump-memory-stats to find out where my application uses its 
> memory, unfortunately, it does not seem to print out any usefull info.  When 
> calling it with no arguments I get the value "???64d" for everything:
> 
> Begin Dump
> Begin Racket3m
>     <application-code>:        ???64d        ???64d
>   <unary-application-c:        ???64d        ???64d
>   <binary-application-:        ???64d        ???64d
>        <sequence-code>:        ???64d        ???64d
>          <branch-code>:        ???64d        ???64d
>       <procedure-code>:        ???64d        ???64d
>       <let-value-code>:        ???64d        ???64d
>        <let-void-code>:        ???64d        ???64d
>          <letrec-code>:        ???64d        ???64d
>         <let-one-code>:        ???64d        ???64d
>   <with-continuation-m:        ???64d        ???64d
>   <define-values-code>:        ???64d        ???64d
>            <set!-code>:        ???64d        ???64d
> ... and so on.
> 
> I'm using Racket 6.5 64bit on a Windows platform.
> 
> Does anyone know how is this supposed to work?
> 
> Thanks,
> Alex.
> 
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