(+ Cc: guix-sysadmin) ludo@gnu.org (Ludovic Courtès) skribis: > I’ve pushed a workaround that seems to work (‘guix copy’ commands that > previously segfaulted on hydra.gnu.org no longer do): > > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=8e469b67f95cfe5b95405b503b8ee315fdf8ce66 > > The idea is simply to explicitly close all the channel ports. That way, > when their finalizer gets called, it doesn’t invoke libssh code. > > (guix build offload) and (guix ssh) already explicitly close all the > channel ports they open, so I found that the culprit is ‘node-eval’ in > Guile-SSH. The patch changes ‘node-eval’ to explicitly close the RREPL > channel upon completion. (BTW, performance-wise, it may be best to > avoid opening a new channel every time ‘node-eval’ is called.) > > That may be good enough for Guix, but of course that’s a workaround and > not a proper fix. > > I’ll do some more testing and then maybe try switching hydra.gnu.org to > Guile 2.2 again. After some more testing, I’ve upgraded hydra.gnu.org to /gnu/store/4p56wc3lmr177ffw0zkjdwcmm3cb18wx-guix-0.13.0-2.de9d8f0 (from /gnu/store/cxmj38x6rh0ykq3d5dlqbxr5h1zgiiaf-guile2.0-guix-0.13.0-1.a6d728b). So far so good, but let’s keep an eye on the ongoing builds. We can always roll back if it turns out my optimism was misplaced. Ludo’.