20.04 unison package issues should probably be talked about in bug 1875475
https://bugs.launchpad.net/ubuntu/+source/unison/+bug/1875475
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https://bugs.launchpad.net/bugs/1568459
Title:
This may help.
After upgrading my Desktop from Mint19 to Mint20 I could not get unison
file sync working to my Ubuntu Server. With some help from the guys on
the GitHub issues list I have now fixed it. Apparently unison for
Ubuntu19 and Mint20 are compiled differently, and even though they are
"This is a real show-stopper. It's not possible to fix this with a new
protocol version?"
I think the problem is really, why should different versions of a multi-
part solution break a system, and the answer is they shouldn't, at least
not between minor versions and ideally all versions should be
Same Problem after upgrading to 20.04 LTS:
server:
unison version 2.48.4
Ubuntu 18.04 bionic
ii unison 2.48.4-1ubuntu1 amd64
client:
unison version 2.48.4
Ubuntu 20.04 LTS focal
ii unison 2.48.4-4ubuntu1
Failed: Server: Fatal error during unmarshaling (input_value: ill-formed
I had the same problem as reported in #21. The solution was to delete a cache
file (fp...) in the .unison directory.
If you run unison with '-debug all', it should log the offending cache file
right before it reports the exception (at least it did for me).
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Just as a note on recompiling, I have tried to build a statically-linked
binary on Ubuntu 19.10 (with OCaml 4.05.0) and run it on 20.04; it
yields the same errors as the dynamically-linked 19.10 binary when run
on 20.04:
Unison failed: Uncaught exception Failure("input_value: ill-formed message")
Interesting. Thanks for the heads up, bacchus. I'm not on 20.04 yet,
but plan to upgrade soon. If I get the same symptoms as you, I'll
probably try recompiling Unison from source. (I hear it's in OCaml, and
that the specific compiler version can matter.)
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The unison binary from 18.04 (unison-2.48.4-gtk) does not run on my
20.04 machine:
'''
Fatal error
Uncaught exception Failure("input_value: ill-formed message")
Raised at file "/build/unison-Y9EcQW/unison-2.48.4/lwt/lwt.ml", line 126,
characters 16-23
Called from file
So this whole bug is clearly just a packaging problem! The old compiled
binaries still run on newer Ubuntu machines, so the easiest step to fix
this bug is to simply add those old binaries to the unison-all and
unison-all-gtk packages, which currently are empty and useless.
It would be nice to
For me on Ubuntu 19.10, the best workaround seems to be to copy its
newer unison-2.48.4 to my old Ubuntu 14.04 machine (and put it into
/usr/local/bin/). Then on my 19.10 machine, I simply add this line to
the *.prf config file I'm using:
servercmd = unison-2.48.4
Alternatively, the ancient
Still the same problem in Ubuntu 19.10! And from the comment above,
20.04 as well. What is the best workaround for this?
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Title:
unison
In kubuntu 20.04 beta from today I have the problem that can't
synchronize to 18.04s unison, despite the fact, that both system run
unison in the same version 2.48.4.
Fatal error: Server: Fatal error during unmarshaling (input_value: ill-formed
message),
possibly because client and server have
Problem is still present in 18.10
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Title:
unison incompatible with older ubuntu/debian versions
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I confirm Todd Taft's report - this is still an issue in 18.04. The
whole purpose of having Unison as a Debian/Ubuntu package is to provide
the function that Unison is meant for - to allow syncing of files across
not only multiple machines, but multiple versions of an o/s and between
versions of
Problem is still present in 18.04
The unison-all and unison-all-gtk have no real content. The only thing in them
is the copyright file and a changelog file that indicates that old versions
were removed. This contradicts the package description which says that it
install multiple supported
Many Debian and Ubuntu versions e.g. Ubuntu Trusty don't have that version
available. Raspbian Wheezy neither. But those are just examples. Unison is
intended to allow for sync-ing of directories over multiple platforms,
Windows included. As a minimum 2.40 needs to be everywhere, but 2.32 would
How about just add the 2.48 version in {xenial,yakkety,zesty}-backports?
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Title:
unison incompatible with older ubuntu/debian versions
To
I confirm that installing the previous version from the dpkg works just
fine in 16.04 despite what is reported about incompatible ocaml
versions. I'm using unison to sync various debian-derived machines, some
on Ubuntu 14.04, some on 16.04 and some on various Debians and Raspbian
too.
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This bug affects 16.10 also.
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Title:
unison incompatible with older ubuntu/debian versions
To manage notifications about this bug go to:
The protocol uses OCaml’s marshalling library to bundle up complex data
structures into compact binary objects for transfer over the wire.
Between 4.02.1 and 4.02.2 there was an incompatible change in this
library. This is the first time this has happened, and I hope it will
be the last.
- B
If the unison *protocol* depends on the ocaml-version that seems like a
bug to me - it's like as if the plain http depended on the c-compiler
that compiled the browser... :-(
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This bug can be worked around by installing the packages for 15.10. The
packages have no dependencies and install just fine with:
$ sudo dpkg -i
For example use:
* unity-gtk AMD64:
https://launchpad.net/ubuntu/+archive/primary/+files/unison-gtk_2.40.102-2ubuntu1_amd64.deb
* unity-gtk i386:
Ubuntu Gnome has unison-all and unison-all-gtk packages with supposedly
include the older version, but even installing these doesn't seem to fix
this problem.
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** Changed in: unison (Ubuntu)
Importance: Undecided => Medium
** Changed in: unison (Ubuntu)
Importance: Medium => High
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Title:
unison
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: unison (Ubuntu)
Status: New => Confirmed
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Title:
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