GNU bug report logs - #56005
"write_wait_fd: unimplemented" error from 'guix substitute'

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Message #39 received at 56005 <at> debbugs.gnu.org (full text, mbox):

From: Thiago Jung Bauermann <bauermann <at> kolabnow.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 56005 <at> debbugs.gnu.org, 56867 <at> debbugs.gnu.org, guile-devel <at> gnu.org
Subject: Re: [bug#56867] [PATCH] download: Do not wrap TLS port on GnuTLS >=
 3.7.7.
Date: Thu, 04 Aug 2022 11:46:47 -0300

Hello Ludo,

I don't have any comment/insight on what you're doing in general, except
about one of your points below:

Ludovic Courtès <ludo <at> gnu.org> writes:

> First, I noticed that GnuTLS doesn’t implement ‘write_wait_fd’, only
> ‘read_wait_fd’ (not sure how problematic that is):
>
> scheme@(guile-user)> ,use(web client)
> scheme@(guile-user)> (define p (open-socket-for-uri "https://guix.gnu.org"))
> scheme@(guile-user)> ((@@ (ice-9 suspendable-ports) wait-for-writable) p)
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> In procedure write_wait_fd: unimplemented
>
> Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
> scheme@(guile-user) [1]> ,q
> scheme@(guile-user)> ,use(gnutls)
> scheme@(guile-user)> (gnutls-version)
> $1 = "3.7.7"
> scheme@(guile-user)> ((@@ (ice-9 suspendable-ports) wait-for-readable) p)
> $2 = 1

This occasionally causes problems when fetching substitutes, as can be
seen in bug #56005 (during substitution: write_wait_fd: unimplemented).

-- 
Thanks
Thiago

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