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))) > ____________________ > Racket Users list: > http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
