ocaml-maint team mailing list archive

[Marc Wouts <1875475@xxxxxxxxxxxxxxxxxx>]

Note that I solved the incompatibility issue with Windows & Mac OS by installing the former Debian version on the Ubuntu 20.04 LTS server:
```
wget http://ftp.fr.debian.org/debian/pool/main/u/unison/unison_2.48.4-1+b1_amd64.deb
sudo dpkg -i unison_2.48.4-1+b1_amd64.deb
```

Running that breaked the compatibility with Unison from the Ubuntu 20.04 LTS client. To solve that, I ran the previous command on the Ubuntu client as well, plus this one:
```
wget http://ftp.fr.debian.org/debian/pool/main/u/unison/unison-gtk_2.48.4-1+b1_amd64.deb
sudo dpkg -i unison-gtk_2.48.4-1+b1_amd64.deb
```

-- 
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/1875475

Title:
  Unison from Ubuntu 20.04 is incompatible with Unison from Ubuntu
  18.04, Windows or Mac OS X

Status in unison package in Ubuntu:
  New

Bug description:
  Unison from Ubuntu 20.04 LTS (version unison=2.48.4-4ubuntu1) works
  well with a client in exactly the same version, with exactly the same
  OS.

  However, it does not work well with Unison 2.48.4-1ubuntu1 from Ubuntu
  18.04, or with Unison on other OSes.

  Once the client has determined the files that were updated, when I click on 'Go', the synchronisation fails with a message like this one: 
  > Fatal error: 
  > Uncaught exception Failure("input_value: ill-formed message")

  Sometimes there is the mention "possibly because client and server
  have been compiled with different versions of the Ocaml compiler."

  I have seen this issues in the following configurations
  - 2.48.4-4ubuntu1 on Ubuntu 20.04 LTS (client) and 2.48.4-1ubuntu1 on Ubuntu 18.04 LTS (server) => Fails
  - 2.48.? on Mac OS X (client) and 2.48.4-4ubuntu1 on Ubuntu 20.04 LTS (server) => Fails
  - 2.48.3 on Windows 7 (client) and 2.48.4-4ubuntu1 on Ubuntu 20.04 LTS (server) => Fails

  Note that the Mac OS and Windows clients were working well with unison
  2.48.4-1ubuntu1 (Ubuntu 18.04 LTS, server).

  Maybe my problem could be solved by reverting unison to the version
  2.48.4-1ubuntu1 from Ubuntu 18.04 LTS. Is is possible to do so with
  `apt install` on Ubuntu 20.04? Thanks!

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: unison 2.48.4-4ubuntu1
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 27 19:18:59 2020
  InstallationDate: Installed on 2020-04-16 (11 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  SourcePackage: unison
  UpgradeStatus: Upgraded to focal on 2020-04-21 (6 days ago)

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