ModuleNotFoundError: No module named 'synapse.synapse_rust'

[toby63]

Description

The new version of synapse 1.76.0 fails to start.

It seems this is the problem:
ModuleNotFoundError: No module named 'synapse.synapse_rust'

Steps to reproduce

• update from 1.75.0 to 1.76.0
• try to start the service
• service fails to start, while 1.75.0 starts fine.

Homeserver

my private homeserver

Synapse Version

1.76.0

Installation Method

Other (please mention below)

Database

SQlite

Workers

Single process

Platform

Manjaro Linux for ARM on a Raspberry Pi.

Configuration

No response

Relevant log output

Traceback (most recent call last):
synapse[845]:   File "/usr/lib/python3.10/runpy.py", line 187, in _run_module_as_main
mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
File "/usr/lib/python3.10/runpy.py", line 110, in _get_module_details
  __import__(pkg_name)
   File "/usr/lib/python3.10/site-packages/synapse/__init__.py", line 23, in <module>
     from synapse.util.rust import check_rust_lib_up_to_date
   File "/usr/lib/python3.10/site-packages/synapse/util/rust.py", line 20, in <module>
    from synapse.synapse_rust import get_rust_file_digest
 ModuleNotFoundError: No module named 'synapse.synapse_rust'
 synapse.service: Main process exited, code=exited, status=1/FAILURE

Anything else that would be useful to know?

Installed via a slightly edited AUR PKGBUILD file: https://archlinux.org/packages/community/x86_64/matrix-synapse/
No build errors.

Python version installed is: 3.10.9

[DMRobertson]

ModuleNotFoundError: No module named 'synapse.synapse_rust'

This is not a bug in Synapse, but a problem with your installation. Synapse is partly written in Rust; the Rust dynamic library (usually called synapse_rust.abi3.so) must be available at import time for Synapse to use.

Installed via a slightly edited AUR PKGBUILD file: archlinux.org/packages/community/x86_64/matrix-synapse

I'm afraid we cannot support community packages for Synapse. I think your best bet is to contact the maintainers of the AUR package for advice.