GNU bug report logs - #29570
(web uri) ABI incompatibility in 2.2.3 leads to 'guix pull' breakage

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

From: Vagrant Cascadian <vagrant <at> debian.org>
To: bug-guix <at> gnu.org
Subject: challenge Backtraces
Date: Mon, 04 Dec 2017 15:16:35 -0800

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

After a recent guix pull, I'm getting tracebacks when attempting to run
guix challenge.

I tried switching subsititues to a local caching proxy, not sure if that
could possibly break anything. But after switching back to using the
substitutes directly, the problem still persists.

$ guix --version
guix (GNU guix) 1fa37d1b55b1d25a9d20c7b50a531b763e7a1398

$ guix challenge --substitute-urls="https://berlin.guixsd.org https://mirror.hydra.gnu.org" linux-libre
Backtrace:
          12 (primitive-load "/gnu/store/sy84f3kbjj2f2nl1ljbdcmsqrz8…")
In guix/ui.scm:
  1452:12 11 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    837:9 10 (catch _ _ #<procedure 7f185b219070 at guix/ui.scm:513…> …)
    837:9  9 (catch _ _ #<procedure 7f185b219088 at guix/ui.scm:611…> …)
    837:9  8 (catch _ _ #<procedure 7f1857f1bd70 at guix/scripts/ch…> …)
In guix/scripts/challenge.scm:
   304:13  7 (_)
In guix/store.scm:
  1444:24  6 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In guix/scripts/challenge.scm:
   305:15  5 (_ _)
   149:34  4 (_ _)
In srfi/srfi-1.scm:
   679:15  3 (append-map _ _ . _)
   592:17  2 (map1 ("https://berlin.guixsd.org"; "https://mirror.hy…"))
In guix/scripts/substitute.scm:
   725:23  1 (lookup-narinfos "https://berlin.guixsd.org"; _)
   697:16  0 (fetch-narinfos "https://berlin.guixsd.org"; ("/gnu/sto…"))

guix/scripts/substitute.scm:697:16: In procedure fetch-narinfos:
guix/scripts/substitute.scm:697:16: Wrong type to apply: #<syntax-transformer uri?>


live well,
  vagrant

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Message #8 received at 29570 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Vagrant Cascadian <vagrant <at> debian.org>
Cc: 29570 <at> debbugs.gnu.org
Subject: Re: bug#29570: challenge Backtraces
Date: Tue, 05 Dec 2017 21:56:41 +0100

Hi Vagrant,

Vagrant Cascadian <vagrant <at> debian.org> skribis:

> $ guix --version
> guix (GNU guix) 1fa37d1b55b1d25a9d20c7b50a531b763e7a1398

It looks like my repo lacks this commit.

> $ guix challenge --substitute-urls="https://berlin.guixsd.org https://mirror.hydra.gnu.org" linux-libre

[...]

> In guix/scripts/challenge.scm:
>    305:15  5 (_ _)
>    149:34  4 (_ _)
> In srfi/srfi-1.scm:
>    679:15  3 (append-map _ _ . _)
>    592:17  2 (map1 ("https://berlin.guixsd.org"; "https://mirror.hy…"))
> In guix/scripts/substitute.scm:
>    725:23  1 (lookup-narinfos "https://berlin.guixsd.org"; _)
>    697:16  0 (fetch-narinfos "https://berlin.guixsd.org"; ("/gnu/sto…"))
>
> guix/scripts/substitute.scm:697:16: In procedure fetch-narinfos:
> guix/scripts/substitute.scm:697:16: Wrong type to apply: #<syntax-transformer uri?>

This is due to an ABI breakage in the (web uri) module that Guile
provides: in 2.2.3 ‘uri?’ is a procedure, but in 2.2.2 it’s a macro.

As it turns out, build-aux/build-self.scm (which is what ‘guix pull’
evaluates) selects the latest Guile 2.2.x, so it builds with 2.2.3, but
then you run that code with 2.2.2, hence the error.

Let’s see how we can work around it…

Ludo’.

Message #17 received at 29570-done <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Vagrant Cascadian <vagrant <at> debian.org>
Cc: 29570-done <at> debbugs.gnu.org
Subject: Re: bug#29570: challenge Backtraces
Date: Thu, 07 Dec 2017 17:18:06 +0100

Hi,

ludo <at> gnu.org (Ludovic Courtès) skribis:

> This is due to an ABI breakage in the (web uri) module that Guile
> provides: in 2.2.3 ‘uri?’ is a procedure, but in 2.2.2 it’s a macro.
>
> As it turns out, build-aux/build-self.scm (which is what ‘guix pull’
> evaluates) selects the latest Guile 2.2.x, so it builds with 2.2.3, but
> then you run that code with 2.2.2, hence the error.

I’ve pushed a workaround as commit
66f217b43aca603326dab17d4dda1a398bf4fb8c.

Thanks,
Ludo’.

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