[plt-scheme] macro stepper stumbles on let-struct

Hi,
The Macro Stepper stumbles at: (let-struct a () ())
Results:

The Macro Stepper window shows:
Internal error computing reductions. Original term:
(let-struct a () ())
#7(struct:trec #5(struct:mrule ...

A separate error window shows:
Internal errors in macro stepper:
The macro stepper failed to compute the reduction sequence for one or more terms.

This is with DrScheme, version 369.10-svn23apr2007 [3m].
Language: Textual (MzScheme, includes R5RS) or
Language: Pretty Big (includes MrEd and Advanced Student).

Jos koot


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20070423/73efa08f/attachment.html>