Hello, 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 workaround has proved to work well for ‘guix offload’ and ‘guix copy’ so I’m closing this bug on our side. In Guile-SSH though, I think there’s still the potential for finalizers getting called in a separate thread and triggering the issue we’ve seen here. Am I right, Artyom? If I’m not mistaken, that calls for a fix as described in , namely protecting libssh objects with mutexes. Ludo’.