RaySession 0.13.0 hangs on Fedora 37

[ycollet]

I am trying to start RaySession 0.13.0 on Fedora 37 and it hangs at startup.
I started Rayssion in debug mode and got this trace:

$ raysession -d
OSC::daemon sends ('/ray/gui/server/announce', '0.13.0', 0, 492, '/home/collette/Ray Sessions', 1)
OSC::daemon sends ('/ray/gui/server/status', 0)
OSC::daemon sends ('/ray/gui/session/name', '', '')
OSC::daemon sends ('/ray/gui/session/notes', '')
OSC::daemon sends ('/ray/gui/patchbay/fast_temp_file_memory', '/tmp/tmp5__43sn2')
OSC::daemon sends ('/ray/gui/server/recent_sessions',)
OSC::daemon sends ('/ray/gui/server/message', 'le démon tourne sur osc.udp://localhost:16188/')
[ray-daemon]GUI connected at osc.udp://localhost:12287/
[ray-daemon]URL : osc.udp://192.168.1.92:16188/
[ray-daemon]      osc.udp://localhost:16188/
[ray-daemon]ROOT: /home/collette/Ray Sessions
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
OSC::gui sends ('/ray/server/list_sessions', 1)
OSC::gui sends ('/ray/server/list_session_templates',)
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
OSC::gui sends ('/ray/server/new_session', 'TuxGuitar', '///with_jack_patch')
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'

OSC::gui sends ('/ray/server/list_sessions', 0)
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
`` `

[ycollet]

And without debug mode:

Connexion de l'IGU au port ray-daemon existant 16187
Error: server did not reply, it may be busy !

[ycollet]

Started ray-daemon manually on a fixed port and started raysession using this port and got these messages on the deamon console:

$ ray-daemon -p 16189
[ray-daemon]URL : osc.udp://192.168.1.92:16189/
[ray-daemon]      osc.udp://localhost:16189/
[ray-daemon]ROOT: /home/collette/Ray Sessions reseau
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'
AttributeError: module 'inspect' has no attribute 'getargspec'
Exception ignored in: 'liblo._msg_callback'
AttributeError: module 'inspect' has no attribute 'getargspec'

[Houston4444]

The problem seems to come from liblo or pyliblo. What is the python version ?

[ycollet]

I've got these information related to pyliblo:

$ dnf info python3-pyliblo
Microsoft Teams                                                                                                                                                                                              11 kB/s | 3.0 kB     00:00    
teams                                                                                                                                                                                                        15 kB/s | 3.0 kB     00:00    
Paquets installés
Nom          : python3-pyliblo
Version      : 0.10.0
Publication  : 24.fc37
Architecture : x86_64
Taille       : 240 k
Source       : pyliblo-0.10.0-24.fc37.src.rpm
Dépôt        : @System
Depuis le dé : fedora
Résumé       : Python bindings for the liblo OSC library
URL          : http://das.nasophon.de/pyliblo/
Licence      : GPLv2+
Description  : pyliblo is a Python wrapper for the liblo Open Sound Control library.
             : It supports almost the complete functionality of liblo, allowing you
             : to send and receive OSC messages using a nice and simple Python API.
             : 
             : Also included are the command line utilities send_osc and dump_osc.

And for liblo

Nom          : liblo
Version      : 0.31
Publication  : 6.fc37
Architecture : x86_64
Taille       : 185 k
Source       : liblo-0.31-6.fc37.src.rpm
Dépôt        : @System
Depuis le dé : fedora
Résumé       : Open Sound Control library
URL          : http://liblo.sourceforge.net
Licence      : LGPLv2+
Description  : liblo is an implementation of the Open Sound Control protocol for
             : POSIX systems developed by Steve Harris.

[Houston4444]

hummm, I use the same versions.

[Houston4444]

No problem with other soft using liblo ? New-Session-Manager for example, there is also carla using pyliblo, but it's not easy to use carla-control (which communicates with carla with pyliblo).

[ycollet]

Looking at SELinux ... Something has been changed. You can't disable SELinux temporarily. Maybe a SELinux option control the port

[ycollet]

Not related to SELinux.
I installed non session manager and nsm works fine.
I think the problem started with RaySession 0.12.0.

[ycollet]

Looks like the inspect python module is not yet python3.11 ready ...
pyinvoke/invoke#833

[Houston4444]

RaySession doesn't use inspect module itself (normally, I sometimes use it when I am debugging if I feel really lost ;)). So it probably comes from pyliblo. pyliblo uses cython (and not python directly).
That said, there is a big problem with pyliblo, it is not maintained anymore, I made this PR dsacre/pyliblo#27 some months ago, and no answer, then I sent a email, no answer...
Very few programs use it now (RaySession, Carla, maybe others but not sure).
I think I will have to fork it and maintain it, it would be maybe less job than adapt RS to an alternative.

That said, I know I can simply try to run it with python3.11, and see.

[Houston4444]

Ok, I reproduce the error !

[Houston4444]

I found the issue. It's here : https://github.com/dsacre/pyliblo/blob/master/src/liblo.pyx#L270
getargspec = (_inspect.getargspec if PY_VERSION_HEX < 0x03000000 else _inspect.getfullargspec)

I didn't know that but in this form ( var = X if condition else Y ), X is evaluated even if the condition is False, here _inspect.getargspec is evaluated, but it doesn't exists, and it raises an error.

a working solution:

if PY_VERSION_HEX < 0x03000000:
    getargspec = _inspect.getargspec
else:
    getargspec = _inspect.getfullargspec

but continue to manage python2 is overrated now.

[ycollet]

Happy you were able to reproduce the bug !
And thanks a lot for the var = X evaluated despite the condition is false ... Quite interesting.

[Houston4444]

Good new, pyliblo has already been forked, and this fork works with python3.11 .
The fork is here: https://github.com/gesellkammer/pyliblo3 , but you can simply install it with
python3 -m pip install pyliblo3

We need to ask packagers to change their base project for this python lib.