#lang racket
(let ((x 1))
  (letrec-syntax ((m (lambda (t) (syntax (m)))))
    (m)))

When I run this in DrRacket 6.3 on Win 10 it starts looping. I hit the stop button. The interaction window says "user break" and is ready for another command.

However, the windows task manager shows DrRacket being very active and eating more and more memory. After a minute DrRacket crashes. I guess the bug is that the stop button doesn't stop the expander?

Jon

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