[racket] ill-formed code (unexpected graph structure) with custom #lang

It looks like the module has associated language info that contains a
hash table, and the bytecode reader doesn't handle the hash table
properly in that context.

You can work around the problem by choosing a different representation
of language info for "slon".

At Sun, 08 Feb 2015 00:56:20 +0300, Dmitry Pavlov wrote:
> Hello,
> 
> Racket seems to have an issue with programs compiled by raco make:
> 
> 
> $ racket test.slon
> OK
> 
> $ raco make test.slon
> $ racket test.slon
> compiled/test_slon.zo: : read (compiled): ill-formed code (unexpected 
> graph structure)
>    context...:
>     standard-module-name-resolver
> 
> $ rm compiled/test_slon.zo
> $ racket test.slon
> OK
> 
> "slon" is a custom language implemented in Racket. I am not sure if it 
> matters. Anyway, as soon as I delete compiled/test_slon.zo, it starts to 
> work, even with the "slon/compiled" and "slon/lang/compiled" directories 
> left intact.
> 
> The test_slon.zo file is 3 KB, the program does nearly nothing, and I 
> have no idea what causes the error. Here is the compiled file (encoded 
> in base64):
> 
> http://pastebin.com/r1kCi5ki
> 
> I am having this trouble in Racket 6.1.1.6, and had it with prior 
> versions (but not all of them -- some time ago everything worked as 
> expected, but I forgot which version that was).
> 
> Is there anything I can do to help to track down the bug?
> 
> Best regards,
> 
> Dmitry
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