GNU bug report logs - #42797
starting thread from an used module dead lock

Previous Next

To reply to this bug, email your comments to 42797 AT debbugs.gnu.org.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michal Herko <michal.herko <at> disroot.org>
To: bug-guile <at> gnu.org
Subject: starting thread from an used module dead lock
Date: Mon, 10 Aug 2020 11:57:51 +0200

[Message part 1 (text/plain, inline)]

Hello,
Attempint to start a new thread from a file loaded using *use-modules*
dead locks guile.

Create a file *start.scm*

```
(define-module (start))

(use-modules
  (ice-9 threads))

(call-with-new-thread
  (lambda ()
    (format #t "hello from thread\n")))
```

Create a file *use.scm*

```
(define-module (use))

(use-modules (start))
```

Execute start.scm:

    $ guile -L . start.scm

The program should print the message end exit.
Instead it would hang forever without using cpu.
The bug displays both on guile version 2.2.7 and 3.0.4.
I was testing on debian bullseye, x86_64.
The workaround is to use *load-from-path* instead of *use-modules*.
The bug does not manifest from REPL.

[use.scm (text/x-scheme, attachment)]

[start.scm (text/x-scheme, attachment)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.