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bug#33229: n-for-each-par-map crash guile 2.2.4

From: Amirouche Boubekki
Subject: bug#33229: n-for-each-par-map crash guile 2.2.4
Date: Thu, 01 Nov 2018 19:21:33 +0100
User-agent: Roundcube Webmail/1.1.2

On my machine with 4 procs the following program crash after a while:

(define-module (hn))

(use-modules (srfi srfi-1))
(use-modules (ice-9 receive))
(use-modules (ice-9 threads))
(use-modules (ice-9 iconv))
(use-modules (web client))
(use-modules (json))

(define (max-id)
(receive (response body) (http-get "https://hacker-news.firebaseio.com/v0/maxitem.json";)
           (string->number (bytevector->string body "utf-8"))))

(define (download uid)
  (catch #t
         (lambda ()
           (let* ((uid (1+ uid))
(url "https://hacker-news.firebaseio.com/v0/item/~a.json";)
             (url (format #f url uid)))
        (cons uid
               (call-with-values (lambda () (http-get url))
                 (lambda (response body)
                   (bytevector->string body "utf-8")))))))
    (lambda _ '())))

(define (store pair)
  (if (null? pair)
      (format #t "X\n")
      (let ((port (open-file "hn.scm" "a")))
        (format #t "~a\n" (car pair))
        (write (cdr pair) port)
        (close port))))

(define (dump)
  (n-for-each-par-map 32 store download (reverse (iota (max-id)))))


I attached to the program with its dependency json.scm.

Mark asked for this report at https://lists.gnu.org/archive/html/guile-devel/2018-07/msg00017.html

I will try guile 3.0 and report back.

Attachment: main.scm
Description: application/elc

Attachment: json.scm
Description: Text document

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