$ gh repo clone eventlet/eventlet
$ python3.13 -V
Python 3.13.0b1
$ tox -e py313
[…]
Failed to build greenlet

$ . .tox/py313/bin/activate
(py313) $ cd ..
(py313) $ gh repo clone python-greenlet/greenlet
(py313) $ git remote add vstinner https://github.com/vstinner/greenlet.git
(py313) $ git fetch --all
(py313) $ git checkout py313
(py313) $ pip install -e .
(py313) $ cd ../eventlet
(py313) $ deactivate

$ tox -e py313
==================================================================================================== ERRORS ====================================================================================================
____________________________________________________________________________________ ERROR collecting tests/asyncio_test.py ____________________________________________________________________________________
tests/asyncio_test.py:18: in <module>
    from .wsgi_test import _TestBase, Site
<frozen importlib._bootstrap>:1360: in _find_and_load
    ???
<frozen importlib._bootstrap>:1331: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:935: in _load_unlocked
    ???
.tox/py313/lib/python3.13/site-packages/_pytest/assertion/rewrite.py:178: in exec_module
    exec(co, module.__dict__)
tests/wsgi_test.py:21: in <module>
    from eventlet import wsgi
eventlet/wsgi.py:14: in <module>
    from eventlet.green import BaseHTTPServer
eventlet/green/BaseHTTPServer.py:3: in <module>
    from eventlet.green import SocketServer
eventlet/green/SocketServer.py:5: in <module>
    from eventlet.green import threading
eventlet/green/threading.py:18: in <module>
    eventlet.patcher.inject(
eventlet/patcher.py:109: in inject
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
/usr/lib64/python3.13/threading.py:35: in <module>
    _start_joinable_thread = _thread.start_joinable_thread
E   AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
__________________________________________________________________________________ ERROR collecting tests/subprocess_test.py ___________________________________________________________________________________
tests/subprocess_test.py:5: in <module>
    from eventlet.green import subprocess
eventlet/green/subprocess.py:8: in <module>
    from eventlet.green import select, threading, time
eventlet/green/threading.py:18: in <module>
    eventlet.patcher.inject(
eventlet/patcher.py:109: in inject  
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
/usr/lib64/python3.13/threading.py:35: in <module>
    _start_joinable_thread = _thread.start_joinable_thread
E   AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
__________________________________________________________________________________ ERROR collecting tests/test__greenness.py ___________________________________________________________________________________
tests/test__greenness.py:6: in <module>
    from eventlet.green import BaseHTTPServer
eventlet/green/BaseHTTPServer.py:3: in <module>
    from eventlet.green import SocketServer
eventlet/green/SocketServer.py:5: in <module>
    from eventlet.green import threading
eventlet/green/threading.py:18: in <module>
    eventlet.patcher.inject(
eventlet/patcher.py:109: in inject  
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
/usr/lib64/python3.13/threading.py:35: in <module>
    _start_joinable_thread = _thread.start_joinable_thread
E   AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
_________________________________________________________________________________ ERROR collecting tests/websocket_new_test.py _________________________________________________________________________________
tests/websocket_new_test.py:7: in <module>
    from eventlet import websocket  
eventlet/websocket.py:21: in <module>
    from eventlet import wsgi
eventlet/wsgi.py:14: in <module>
    from eventlet.green import BaseHTTPServer
eventlet/green/BaseHTTPServer.py:3: in <module>
    from eventlet.green import SocketServer
eventlet/green/SocketServer.py:5: in <module>
    from eventlet.green import threading
eventlet/green/threading.py:18: in <module>
    eventlet.patcher.inject(
eventlet/patcher.py:109: in inject  
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
/usr/lib64/python3.13/threading.py:35: in <module>
    _start_joinable_thread = _thread.start_joinable_thread
E   AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
___________________________________________________________________________________ ERROR collecting tests/websocket_test.py ___________________________________________________________________________________
tests/websocket_test.py:9: in <module>
    from eventlet.websocket import WebSocket, WebSocketWSGI
eventlet/websocket.py:21: in <module>
    from eventlet import wsgi
eventlet/wsgi.py:14: in <module>
    from eventlet.green import BaseHTTPServer
eventlet/green/BaseHTTPServer.py:3: in <module>
    from eventlet.green import SocketServer
eventlet/green/SocketServer.py:5: in <module>
    from eventlet.green import threading
eventlet/green/threading.py:18: in <module>
    eventlet.patcher.inject(
eventlet/patcher.py:109: in inject  
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
/usr/lib64/python3.13/threading.py:35: in <module>
    _start_joinable_thread = _thread.start_joinable_thread
E   AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
_____________________________________________________________________________________ ERROR collecting tests/wsgi_test.py ______________________________________________________________________________________
tests/wsgi_test.py:21: in <module>  
    from eventlet import wsgi
eventlet/wsgi.py:14: in <module>
    from eventlet.green import BaseHTTPServer
eventlet/green/BaseHTTPServer.py:3: in <module>
    from eventlet.green import SocketServer
eventlet/green/SocketServer.py:5: in <module>
    from eventlet.green import threading
eventlet/green/threading.py:18: in <module>
    eventlet.patcher.inject(
eventlet/patcher.py:109: in inject  
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
/usr/lib64/python3.13/threading.py:35: in <module>
    _start_joinable_thread = _thread.start_joinable_thread
E   AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'

----------- coverage: platform linux, python 3.13.0-beta-1 -----------
Name                                              Stmts   Miss Branch BrPart  Cover
-----------------------------------------------------------------------------------
[… coverage lines omitted …]
-----------------------------------------------------------------------------------
TOTAL                                              9778   8197   3538     43    13%

=========================================================================================== short test summary info ============================================================================================
ERROR tests/asyncio_test.py - AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
ERROR tests/subprocess_test.py - AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
ERROR tests/test__greenness.py - AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
ERROR tests/websocket_new_test.py - AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
ERROR tests/websocket_test.py - AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
ERROR tests/wsgi_test.py - AttributeError: module 'eventlet.green.thread' has no attribute 'start_joinable_thread'
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 6 errors during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
============================================================================================== 6 errors in 2.73s ===============================================================================================
py313: exit 2 (3.24 seconds) /home/ben/src/forks/eventlet> pytest --verbose --cov=eventlet tests/ pid=300264
  py313: FAIL code 2 (6.88=setup[0.13]+cmd[3.51,3.24] seconds)
  evaluation failed :( (6.94 seconds)