[O] Babel doesn't like some Racket comments

[Lawrence Bottorff]

C-c C-c-ing this code

#+begin_src scheme

(define (foo x)

  ;just add one

  (+ 1 x)) ; comment

#+end_src

causes Racket (geiser) to freeze up. Sometimes I see a

Code block evaluation complete.

geiser-repl--maybe-send: Args out of range: 61, 62

-like message. The culprit is the ; comment next to the `(+ 1 x))` line. If I take it out the ; just add one doesn't cause a problem. This behavior doesn't happen in naked racket or regular geiser on racket.

LB