bug#43845: toplevel definition in module: another compiler optimization bug

[Jan Nieuwenhuizen <janneke@gnu.org>]

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Hi!

This morning I found another bug while porting Mes to Guile-3.  It looks
similar to #43831; compilation with -O2 shows wrong behaviour.

Also, this works on Guile-2.2.

To reproduce:

--8<---------------cut here---------------start------------->8---
14:02:54 janneke@dundal:~/tmp/bug2 [env]
$ guile --no-auto-compile -L . script.scm 
dumping0: foo
14:03:06 janneke@dundal:~/tmp/bug2 [env]
$ guild compile -O1 -o mescc.go mescc.scm
wrote `mescc.go'
14:03:33 janneke@dundal:~/tmp/bug2 [env]
$ guile --no-auto-compile -L . -C . script.scm 
dumping0: foo
14:03:42 janneke@dundal:~/tmp/bug2 [env]
$ guild compile -O2 -o mescc.go mescc.scm
wrote `mescc.go'
14:03:49 janneke@dundal:~/tmp/bug2 [env]
$ guile --no-auto-compile -L . -C . script.scm 
dumping0: foo
Backtrace:
           1 (primitive-load "/home/janneke/tmp/bug2/script.scm")
In mescc.scm:
     27:4  0 (with-output-to-file _ #<procedure 7f5effc15388 at mescc.scm:35:6 _>)

mescc.scm:27:4: In procedure with-output-to-file:
Throw to key `looping' with args `()'.
[1]14:03:52 janneke@dundal:~/tmp/bug2 [env]
$
--8<---------------cut here---------------end--------------->8---

Greetings,
Janneke


[-- Attachment #2: script.scm --]
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;;; GNU Mes --- Maxwell Equations of Software
;;; Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Mes.
;;;
;;; GNU Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.

(use-modules (mescc))
(mescc:compile)

[-- Attachment #3: mescc.scm --]
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;;; GNU Mes --- Maxwell Equations of Software
;;; Copyright © 2016,2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Mes.
;;;
;;; GNU Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.

(define-module (mescc)
  #:export (mescc:compile))

(define seen? #f) ; For frienldier debugging

(define GUILE-with-output-to-file with-output-to-file)
(define (with-output-to-file file-name thunk)
  (when seen?
    (throw 'looping))
  (set! seen? #t)
  (if (equal? file-name "-") (thunk)
      (GUILE-with-output-to-file file-name thunk)))

(define (mescc:compile)
    (format (current-error-port) "dumping0: ~a\n" "foo")
    (with-output-to-file "foo"
      (lambda _ (display "BOO\n"))))

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Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
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