[plt-dev] EMERGENCY: drscheme no longer works in today's svn head

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Thu Aug 27 20:21:48 EDT 2009

That might make sense as a longer term fix, but if we went that way I
don't think we'd be able to include that in the next release, so
probably wouldn't help with the problems at hand, I'm sorry to say. It
is an interesting thought, tho.

It is probably too much to ask, but I believe you could do that
yourself by changing how the .dep files work in CM.


On Thu, Aug 27, 2009 at 6:51 PM, Faré<fahree at gmail.com> wrote:
> Maybe it's time to consider either a pure functional or reactive
> functional approach to compiled objects?
> Pure functional: the object filename includes a hash that uniquely
> identifies the computation that produced the object, including hash of
> the mzscheme binary and any used library, options, etc.
> Reactive functional: the object pathname is explicit enough to
> uniquely identifies the computation that may produced the object
> starting from other files in the filesystem or pure functional items
> as above, including explicit encoded paths or hashs for the mzscheme
> binary, libraries, options, etc.
> The problem being of course to garbage collect unreachable objects
> when you upgrade your PLT installation.
> (Didn't Shriram sermon the Lispers for their sin of not believing in
> functional programming?)
> OK, I promise I won't suggest that anymore unless prompted.
> [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ]
> In a country where the sole employer is the State, opposition means death by
> slow starvation. The old principle: who does not work does not eat, has been
> replaced by a new one: who does not obey shall not eat.- Leon Trotsky
> 2009/8/27 Robby Findler <robby at eecs.northwestern.edu>:
>> Sorry -- this was not aimed at you specifically. In this case, I think
>> it is going to be tricky to reproduce.
>> In any case, I think you probably can get away with deleting all
>> compiled/drscheme directories in the future if this happens.
>> Robby
>> On Thu, Aug 27, 2009 at 6:30 PM, Matthias Felleisen<matthias at ccs.neu.edu> wrote:
>>> On Aug 27, 2009, at 7:26 PM, Robby Findler wrote:
>>>> On Thu, Aug 27, 2009 at 6:15 PM, Matthias Felleisen<matthias at ccs.neu.edu>
>>>> wrote:
>>>>> I blew away my tree and compiled the whole thing from scratch. All bugs
>>>>> disappeared.
>>>> That makes sense to me.
>>>> The trick is to understand how your .zo files got into the wrong state
>>>> in the first place.
>>>> One possible issue: DrScheme shares some of its own instantiation of
>>>> various modules with the user's program. Perhaps there is some way
>>>> that that can confuse CM? Does that seem possible to anyone?
>>> I am sorry, but I don't have time for a proper bug report. I am still trying
>>> to write a talk -- for which I need a working drscheme.
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