Hello, I ran "(define my-generator (generator () (yield 1) (yield 2 3 4)))" on DrRacket's Interactions Window, but forgot to require racket/generator first.
The error message was: #%app: missing procedure expression; probably originally (), which is an illegal empty application in: (#%app) Which makes sense. However, wouldn't it be more helpful if it would first complain about `generator' being undefined? []'s Rodolfo Carvalho
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