In fact, further investigation shows that the binary built with the OCamL 4.05 compiler is working fine. The error message quoted in my previous post is obviously caused by a cache file corrupted by previously running the binary from deb (compiled with OCamL 4.08). Deleting the cache file fixes the problem.
I have now verified that just using the binary copied over from Bionic works equally well on Focal. So the workaround seems to be to uninstall the unison deb package and to copy the /usr/bin/unison-2.48.4 binary from a Bionic system into /usr/local/bin, /opt/bin, $HOME/bin or whatever else you prefer (and possibly to create a symlink called unison). -- You received this bug notification because you are a member of Debian OCaml Maintainers, which is subscribed to unison in Ubuntu. https://bugs.launchpad.net/bugs/1868502 Title: Synchronization with earlier Ubuntu versions or a recent Debian version fails Status in unison package in Ubuntu: Confirmed Bug description: Any synchronization I want to do with my server (Debian buster) fails with the following message: > Fatal error: Server: Fatal error during unmarshaling (input_value: ill-formed message), > possibly because client and server have been compiled with differentversions of the OCaml compiler. Indeed, buster uses OCaml 4.05.0, focal uses 4.08.1. eoan used 4.05.0, as did the prior versions, including bionic, which all still synchronize fine. The current Windows version also synchronizes with that version. Although intentionally using an old software version for compatibility is not a good thing, in this case it might be necessary. The whole point of unison is its interoperability. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unison/+bug/1868502/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ocaml-maint Post to : [email protected] Unsubscribe : https://launchpad.net/~ocaml-maint More help : https://help.launchpad.net/ListHelp
