I can confirm this behavior and I consider it a bug. I have submitted a bug
(#11448) in your name so that you hear back when we get around to fixing it.
In the meantime, I propose you use the work arounds that you have figured out.
Sorry for any inconvenience -- Matthias
On Nov 18, 2010, at 4:38 AM, Benjamin Seppke wrote:
Hi,
we use DrRacket for educational purpose at our University and have found out
some strange behavior of the module system.
For one excercise, we provide a racket module containing (and providing)
symbols that have images (of flags) as values. The students should use these
images to visualize the results of their programs.
When the module file is put in the same directory as the students' excercise
file, Racket gives an error message after (require flag-module.rkt) telling
us:
write: cannot marshal constant that is embedded in compiled code:
(object:image-snip% ...)
Okay, so marshalling is the problem here... However, it works if we add the
file to the collects/XXX Folder and load it via (require xxx/flag-module) -
maybe because collect modules are not compiled again?
It also works if I uncheck fill compiled/-directories in Language-Select
lang-Details. Although this works, I would prefer a successful loading of
modules, which contain images, without disabling the compilation. As I'm not
too familiar with Racket's internals, I'm asking if there is a way to achieve
that. Or - maybe - if this behavior is by design, and Racket is supposed to
work like that?
Btw, I am using Racket 5.0.1 @ Mac OS X 10.5, but this behavior seems to
occur independently of the OS.
Best regards,
Benjamin Seppke
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