[racket] instantiating multiple sandboxes with gui's

Yes, this is a limitation of `racket/gui/base`. On initialization, the
library must register in various non-composable ways with an underlying
GUI toolkit (callbacks, Objective-C classes, Win32 classes, etc.), and
so `racket/gui/base` cannot be instantiated multiple times.

At Sun, 23 Mar 2014 20:12:43 -0400, Spencer Florence wrote:
> I'm attempting to launch multiple evaluators which require `racket/gui`,
> however I get the error:
> 
> cannot instantiate `racket/gui/base` a second time in the same process
> 
> Is `racket/gui/base` maintaining some kind of state thats escaping the
> sandbox?
> 
> 
> 
> 
> 
> Example of the problem:
> 
> #lang racket/base
> (require racket/sandbox)
> 
> (call-with-trusted-sandbox-configuration
>  (lambda ()
>    (define (make)
>      (make-evaluator 'racket/base
>                      #:requires '(racket/gui/base)))
> 
>    (make)
>    (make)))
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