bug#59493: cuirass-remote-worker crash

[Mathieu Othacehe <othacehe@gnu.org>]

Hello Ludo,

Thanks for gathering those information.

> 2022-11-21 14:27:24   1685:16  0 (raise-exception _ #:continuable? _)
> 2022-11-21 14:27:24
> 2022-11-21 14:27:24 ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> 2022-11-21 14:27:24 Throw to key `match-error' with args `("match" "no matching pattern" (#vu8()))'.

Yes this is because a new remote-server is running on Berlin and it
sends an empty sequence at every connection:
https://git.savannah.gnu.org/cgit/guix/guix-cuirass.git/commit/?id=fc1641381d2a8a0472a71ef5ad2b64361faaaab4

All remote-workers must update, and I have deployed Cuirass
1.1.0-13.1341725 on all hydra workers + guix9p.

I have been trying to deploy that to overdrive1 for two days but Berlin
offloads the builds to kreuzberg which has some issues because a lot of
builds are timeouting:

--8<---------------cut here---------------start------------->8---
\building of `/gnu/store/9jg75a8rvdz3qxcbbm95312rlc4hyi98-mrustc-0.10-2.597593a-checkout.drv' timed out after 3600 seconds of silence
build of /gnu/store/9jg75a8rvdz3qxcbbm95312rlc4hyi98-mrustc-0.10-2.597593a-checkout.drv failed
View build log at '/var/log/guix/drvs/9j/g75a8rvdz3qxcbbm95312rlc4hyi98-mrustc-0.10-2.597593a-checkout.drv.gz'.
cannot build derivation `/gnu/store/wavx7rl6h93fpmc46nggnhkyxm75lqa4-mrustc-0.10-2.597593a-checkout.drv': 1 dependencies couldn't be built
--8<---------------cut here---------------end--------------->8---

> (Stuttering is due to the unprotected use of ‘primitive-fork’: a
> non-local exit in the child leads it to execute the same code as its
> parent.  We should fix that, but should we really fork in the first
> place?  :-))

Right, this is problematic. I can't remember why I chose to fork.

In the meantime, this should be fixed by updating to 1.1.0-13.1341725 so
we can close this one I guess.

Mathieu