pwdsphinx 2.0.3 fails on Python 3.14 with "RuntimeError: There is no current event loop in thread 'MainThread'"

[link2xt]

I have set up sphinx on Arch Linux after packaging it at https://aur.archlinux.org/packages/pwdsphinx

I created the following config at ~/.config/sphinx/config:

[client]
verbose = false
datadir="~/.config/sphinx"
rwd_keys=false
validate_password=true
userlist=true
delete_upgraded=false
threshold = 2

[servers]
[servers.ctrlc1]
host="pwd.ctrlc.hu"
port=443
ltsigkey="QjMKdyG6XCdgonn0xrvzKEXLOej/sVAtgfDayZBYVP0="

[servers.ctrlc2]
host="pwd2.ctrlc.hu"
port=443
ltsigkey="sJs724fgJ8ax98gTI3IihtFmzkz8lls41+GcDMHCQpk="

[servers.dyne]
host="sphinx.dyne.org"
port=4443
ltsigkey="TnQHEiiJtFXqhUskqAxtIhG/xlk9t79BXyLcofai32g="

Servers are from https://sphinx.pm/servers.html

Then I tried to run it and it failed:

$ sphinx init
/usr/lib/python3.14/site-packages/pwdsphinx/websphinx.py
you want to make a backup of the following masterkey, keep it safe and secure b'K2ckhSA7my61fjJSib+bFqHt9oEwtToyyPFf9KSacgk=\n'
this key is also stored - and must be available - at: /home/user/.config/sphinx/masterkey
Traceback (most recent call last):
  File "/usr/bin/sphinx", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/lib/python3.14/site-packages/pwdsphinx/sphinx.py", line 1107, in main
    sys.exit(init())
             ~~~~^^
  File "/usr/lib/python3.14/site-packages/pwdsphinx/sphinx.py", line 539, in init
    create(m, b"all ok?", "healthcheck", "sphinx servers", target="everything works fine")
    ~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/pwdsphinx/sphinx.py", line 547, in create
    beta = dkg(m, CREATE_DKG, threshold, ids, alpha)
  File "/usr/lib/python3.14/site-packages/pwdsphinx/sphinx.py", line 475, in dkg
    peer_msgs = m.gather(sizes[0],n) #,debug=True)
  File "/usr/lib/python3.14/site-packages/pyoprf/multiplexer.py", line 439, in gather
    return asyncio.get_event_loop().run_until_complete(self.gather_async(*args, **kwargs))
           ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.14/asyncio/events.py", line 715, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
                       % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'MainThread'.

(I know that it printed masterkey, I am only testing it and will change it once it works)

[stef]

interesting, can you tell me which version of pyoprf you are using?

[link2xt]

pyoprf 0.9.3, packaged at https://aur.archlinux.org/packages/python-pyoprf:

$ pacman -Qi python-pyoprf
Name            : python-pyoprf
Version         : 0.9.3-1
Description     : Python bindings for the liboprf library
Architecture    : any
URL             : https://pypi.org/project/pyoprf/
Licenses        : LGPL-3.0-or-later
Groups          : None
Provides        : None
Depends On      : liboprf  python-pyserial-asyncio
Optional Deps   : None
Required By     : pwdsphinx
Optional For    : None
Conflicts With  : None
Replaces        : None
Installed Size  : 343.08 KiB
Packager        : Unknown Packager
Build Date      : Sun 22 Feb 2026 02:07:33 AM UTC
Install Date    : Sun 22 Feb 2026 02:07:52 AM UTC
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : None

[link2xt]

I also wrote some raw notes about packaging on https://link2xt.codeberg.page/blog/2026-02-22-sphinx-aur.html

[link2xt]

According to https://docs.python.org/3.14/library/asyncio-eventloop.html#asyncio.get_event_loop asyncio.get_event_loop() has been changed to fail in Python 3.14 instead of starting a new loop. Too new Python is likely the reason it fails.

[link2xt]

This should probably be solved in pwdsphinx by using asyncio.run somewhere in main() to start async main.

[stef]

oh, damn. thanks for the headsup! will fix this asap, probably not immediately, but within 24 hours.

i see that pwdsphinx also has 25 commits since v2.0.3 maybe also time for a new release.

[stef]

This should probably be solved in pwdsphinx by using asyncio.run somewhere in main() to start async main.

nah, this belongs into the multiplexer of pyoprf, the __init__() already handles this: https://github.com/stef/liboprf/blob/master/python/pyoprf/multiplexer.py#L359

class Multiplexer:
    def __init__(self, peers, alpn_proto=None):
        if asyncio.get_event_loop_policy()._local._loop is None:
            loop = asyncio.new_event_loop()
            asyncio.set_event_loop(loop)

sphinx.py itself does not know about asyncio, and i would like to keep it that way. asyncio is something i'm not very happy about, so i like to confine it somewhere deep below.

[link2xt]

asyncio is something i'm not very happy about, so i like to confine it somewhere deep below.

Yes, I tried asyncio once and it did not go well: chatmail/core#4787

[stef]

would you be able to test this PR with py3.14 (which is :pi:) stef/liboprf#19

[stef]

just released an updated https://github.com/stef/liboprf/releases/tag/v0.9.4 and a new pwdsphinx release as well https://github.com/stef/pwdsphinx/releases/tag/v2.0.4

[link2xt]

I updated liboprf, pyoprf and pwdsphinx on AUR, it works now (with a single server config).

[stef]

great to hear. i'll try to ping you back when i hear back from the dyne.org server that is awol... sorry bout that.

thank you for packaging, testing, reporting and working with me on this. ❤️

[stef]

sphinx.dyne.org is operational again!