I tried to narrow down the problem by re-building unison with OCamL 4.05
on my Focal (20.04) client (no ocaml deb package installed):
- Downloaded OCamL 4.05.0, ran make and make install
$ which ocamlopt
/usr/local/bin/ocamlopt
$ ocamlopt -v
The OCaml native-code compiler, version 4.05.0
Standard library directory: /usr/local/lib/ocaml
- Downloaded sources of unison 2.48.4, ran make ('make world' or 'make world
opt' didn't seem to make any difference)
$ ls -l ./src/unison
-rwxr-xr-x 1 meinhard v5 5038200 May 20 14:50 ./src/unison
$ file ./src/unison
./src/unison: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV),
dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2,
BuildID[sha1]=cddb0691b6b9721087be3f2f6f4f2397f57f4171, for GNU/Linux 3.2.0,
with debug_info, not stripped
$ ldd ./src/unison
linux-vdso.so.1 (0x00007ffda03f4000)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f97aa540000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f97aa3f1000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f97aa3eb000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f97aa1f9000)
/lib64/ld-linux-x86-64.so.2 (0x00007f97aa8b8000)
$ ./src/unison -version
unison version 2.48.4
Yet no luck when syncing to my Bionic server, even though the error message is
very different:
$ ./src/unison <target>
[...]
Looking for changes
Uncaught exception Failure("input_value: ill-formed message")
Raised at file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/lwt/lwt.ml", line
126, characters 16-23
Called from file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/lwt/generic/lwt_unix_impl.ml",
line 102, characters 8-23
Called from file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/update.ml"
(inlined), line 2096, characters 2-69
Called from file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/uitext.ml", line
700, characters 16-56
Called from file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/uitext.ml", line
788, characters 6-90
Called from file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/uitext.ml", line
810, characters 19-66
Called from file
"/data01/meinhard/Scratch/Software/Unison/unison-2.48.4/src/uitext.ml", line
870, characters 21-43
Not having any clue about OCamL, I don't know what causes this error -
the source file lwt.ml doesn't look suspicious in any way at the
incriminated line.
Any help I can further provide to understand and fix the problem, please
let me know. (For the moment I'll keep OCamL 4.05 and unison 2.48-4
sources around...)
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https://bugs.launchpad.net/bugs/1868502
Title:
Synchronization with earlier Ubuntu versions or a recent Debian
version fails
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unison/+bug/1868502/+subscriptions
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