Ok, this looks like it's related to the macro gen, so I don't see any issue 
to fix in the spec - valid inputs at the point are either strings or 
symbols - I think through eval you were ending up with a class instance.

On Monday, March 6, 2017 at 1:16:38 AM UTC-6, Mars0i wrote:
>
>
>
> On Sunday, March 5, 2017 at 6:51:57 PM UTC-6, Alex Miller wrote:
>>
>> I would really appreciate seeing the ns declaration that caused the 
>> original error. I have not been able to exactly reproduce what you are 
>> describing. If you can't share it publicly, you can send it to me at 
>> alex....@cognitect.com.
>>
>> Thanks,
>> Alex
>>
>
> Thanks--sure, I am willing to make public the ... bad things I am doing in 
> my code.  I have to explain that the ns declaration is very large; it's 
> generated by a macro that creates a lot of code.  I wrote it to ease 
> interop with a useful but not entirely Clojure-friendly Java library I'm 
> using.  This required violating some standard, useful coding guidelines.
>
> This file 
> <https://github.com/mars0i/pasta/blob/master/doc/notes/defsimconfigOutputMarch2017.clj>
>  
> contains pretty-printed output from macroexpand-1 (made with Clojure 
> 1.8.0--the offending macro call is in an aot-compiled file, so it would 
> have been harder to start the repl with 1.9.0).  There are actually two ns 
> declarations (a trick to avoid some cyclic references).  The code that 
> caused the errors begins at line 66 in the second ns.
>
> The macro call in my source is here 
> <https://github.com/mars0i/pasta/blob/7eaa6835f22f8eecb604e7aa47bfde9d96eac13e/src/clj/free_agent/SimConfig.clj>on
>  
> line 29, and the macro definition is at the bottom of this file 
> <https://github.com/mars0i/pasta/blob/7eaa6835f22f8eecb604e7aa47bfde9d96eac13e/src/clj/utils/defsimconfig.clj>.
>   
> Both of those links are to the code just before the commit in which I added 
> apostrophes to the instances of java.lang.Object (at line 210 of the macro 
> definition file).  This got rid of the errors, and the application seems to 
> run correctly.
>
> (If you look at the current version of the code, you'll see that I 
> recently changed the project name from free-agent to pasta; 'lein uberjar' 
> didn't like the hyphen.)
>
> If you need me to make a minimal example, I can probably do that.
>

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