[plt-scheme] DrScheme buglet?

You are truly a prince among men!

Is there a way to make a patch from current SVN or a similarly easy way
to get this to my students? (Sorry, offer an inch and I'll ask for the
moon. In addition, I will mix metaphors.)

Seriously, though, THANKS BUNCHES!!!

On Wed, 2007-08-29 at 21:32 -0500, Robby Findler wrote:
> Well, sorry for the lack of clarity on my part, but the currently
> checked in SVN version of drscheme always includes the teachpacks in
> the REPL, regardless of the error that occurs (barring bugs, of
> course).
> 
> It does this by catching the compile-time exn, saving it, and then
> making up a dummy program with nothing in it but the teachpacks. after
> that program succeeds, it re-raises the original error.
> 
> This does change the order of the raised exceptions in the case that
> there is a runtime error in a teachpack and a compile-time error in
> the original program, but that seems relatively unimportant.
> 
> Also, this only works with the GUI-inserted teachpacks. If you
> actually type "require" in your program, you get the old behavior.
> 
> Robby
> 
> On 8/29/07, Robby Findler <robby at cs.uchicago.edu> wrote:
> > On 8/29/07, Todd O'Bryan <toddobryan at mac.com> wrote:
> > > On Wed, 2007-08-29 at 11:01 -0500, Robby Findler wrote:
> > > > On 8/29/07, Todd O'Bryan <toddobryan at mac.com> wrote:
> > > > > Yep. This is what's happening and it's kind of what I suspected.
> > > > >
> > > > > I wonder if there would be some way to create a definition scope that
> > > > > just consists of the teachpacks and then add the user definitions to
> > > > > that scope if it's syntactically well-formed. If it's not, just load the
> > > > > teachpack scope or something.
> > > >
> > > > In general, that's a wonderful research question :)
> > > >
> > > Is this really a research question? I'll admit I'm not up enough on how
> > > exactly contexts are implemented, but isn't it somewhat additive? Can't
> > > you evaluate the teachpacks, save the data structure you get, evaluate
> > > the user defs and use the saved structure or the final structure
> > > depending on whether or not you get an error?
> > >
> > > Obviously, I'm vastly oversimplifying or you wouldn't have said what you
> > > said, but can you tell me how I'm oversimplifying concisely in a way
> > > that's not likely to make my brain explode? :-) No is an acceptable
> > > answer.
> >
> > Oh -- you know I didn't think carefully about what you said. I just
> > thought "macros, you can't do that!". But, one could probably get the
> > effect of what you suggest by trying to compile the (implicit) module
> > and, if it fails, just compile a module that only contains the
> > teachpacks, without the user's program, and then make that available
> > to the user.
> >
> > Robby
> >