bug#41625: Sporadic guix-offload crashes due to EOF errors

[Marius Bakke]

Marius Bakke <marius@gnu.org> writes:

> During 'guix build -s aarch64-linux dolphin' on Berlin, I got this crash:

Funny, I just got it _again_ building the same derivation.  It seems to
happen while checking load on the selected offload machine, which is
'overdrive1.guixsd.org' in this and the previous case:

--8<---------------cut here---------------start------------->8---
successfully built 
/gnu/store/qwscp6h2zsxr0knaizn1fn0saw1pfimi-kidletime-5.70.0.drv
process 51308 acquired build slot '/var/guix/offload/141.80.167.174:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.181:22/0'
process 51308 acquired build slot 
'/var/guix/offload/overdrive1.guixsd.org:52522/1'
process 51308 acquired build slot '/var/guix/offload/localhost:2223/1'
process 51308 acquired build slot '/var/guix/offload/141.80.167.162:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.180:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.161:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.170:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.163:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.166:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.177:22/0'
process 51308 acquired build slot '/var/guix/offload/localhost:2222/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.173:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.168:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.169:22/0'
process 51308 acquired build slot '/var/guix/offload/141.80.167.176:22/0'
Backtrace:
In ice-9/boot-9.scm:
  1736:10  5 (with-exception-handler _ _ #:unwind? _ # _)
In unknown file:
           4 (apply-smob/0 #<thunk 7f3e4487b1c0>)
In ice-9/boot-9.scm:
    718:2  3 (call-with-prompt _ _ #<procedure default-prompt-handle…>)
In ice-9/eval.scm:
    619:8  2 (_ #(#(#<directory (guile-user) 7f3e4445ff00>)))
In guix/ui.scm:
  1936:12  1 (run-guix-command _ . _)
In guix/scripts/offload.scm:
   742:22  0 (guix-offload . _)

guix/scripts/offload.scm:742:22: In procedure guix-offload:
Throw to key `match-error' with args `("match" "no matching pattern" #<eof>)'.
guix build: error: unexpected EOF reading a line
--8<---------------cut here---------------end--------------->8---

'guix offload test' passes without problems.

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