multiprocessing crash when initializing MPRIS
Author: whileAliceCreated Jan 3, 2026Updated Mar 6, 2026
Fresh install of yewtube, no configuration. I'm getting this:
Traceback (most recent call last):
File "<string>", line 1, in <module>
from multiprocessing.forkserver import main; main(5, 7, ['__main__'], **{'sys_path': ['/usr/bin', '/usr/lib/python314.zip', '/usr/lib/python3.14', '/usr/lib/python3.14/lib-dynload', '/usr/lib/python3.14/site-packages'], 'main_path': '/usr/bin/yt', 'authkey_r': 9})
~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/forkserver.py", line 217, in main
spawn.import_main_path(main_path)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/spawn.py", line 307, in import_main_path
_fixup_main_from_path(main_path)
~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/spawn.py", line 297, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
run_name="__mp_main__")
File "<frozen runpy>", line 287, in run_path
File "<frozen runpy>", line 98, in _run_module_code
File "<frozen runpy>", line 88, in _run_code
File "/usr/bin/yt", line 3, in <module>
mps_youtube.main.main()
~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.14/site-packages/mps_youtube/main.py", line 118, in main
init.init()
~~~~~~~~~^^
File "/usr/lib/python3.14/site-packages/mps_youtube/init.py", line 102, in init
t.start()
~~~~~~~^^
File "/usr/lib/python3.14/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
~~~~~~~~~~~^^^^^^
File "/usr/lib/python3.14/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/context.py", line 300, in _Popen
return Popen(process_obj)
File "/usr/lib/python3.14/multiprocessing/popen_forkserver.py", line 35, in __init__
super().__init__(process_obj)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/popen_fork.py", line 20, in __init__
self._launch(process_obj)
~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/popen_forkserver.py", line 42, in _launch
prep_data = spawn.get_preparation_data(process_obj._name)
File "/usr/lib/python3.14/multiprocessing/spawn.py", line 164, in get_preparation_data
_check_not_importing_main()
~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.14/multiprocessing/spawn.py", line 140, in _check_not_importing_main
raise RuntimeError('''
...<16 lines>...
''')
RuntimeError:
An attempt has been made to start a new process before the
current process has finished its bootstrapping phase.
This probably means that you are not using fork to start your
child processes and you have forgotten to use the proper idiom
in the main module:
if __name__ == '__main__':
freeze_support()
...
The "freeze_support()" line can be omitted if the program
is not going to be frozen to produce an executable.
To fix this issue, refer to the "Safe importing of main module"
section in https://docs.python.org/3/library/multiprocessing.html
Traceback (most recent call last):
File "/usr/bin/yt", line 3, in <module>
mps_youtube.main.main()
~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.14/site-packages/mps_youtube/main.py", line 118, in main
init.init()
~~~~~~~~~^^
File "/usr/lib/python3.14/site-packages/mps_youtube/init.py", line 102, in init
t.start()
~~~~~~~^^
File "/usr/lib/python3.14/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
~~~~~~~~~~~^^^^^^
File "/usr/lib/python3.14/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/context.py", line 300, in _Popen
return Popen(process_obj)
File "/usr/lib/python3.14/multiprocessing/popen_forkserver.py", line 35, in __init__
super().__init__(process_obj)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/popen_fork.py", line 20, in __init__
self._launch(process_obj)
~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/popen_forkserver.py", line 51, in _launch
self.sentinel, w = forkserver.connect_to_new_process(self._fds)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/forkserver.py", line 106, in connect_to_new_process
connection.answer_challenge(
~~~~~~~~~~~~~~~~~~~~~~~~~~~^
wrapped_client, self._forkserver_authkey)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.14/multiprocessing/connection.py", line 970, in answer_challenge
message = connection.recv_bytes(256) # reject large message
File "/usr/lib/python3.14/multiprocessing/connection.py", line 222, in recv_bytes
buf = self._recv_bytes(maxlength)
File "/usr/lib/python3.14/multiprocessing/connection.py", line 447, in _recv_bytes
buf = self._recv(4)
File "/usr/lib/python3.14/multiprocessing/connection.py", line 412, in _recv
chunk = read(handle, to_read)
ConnectionResetError: [Errno 104] Connection reset by peerTurning off MPRIS makes the app run. This is on musl-based Void Linux.
yewtube version : 2.12.0
yt_dlp version : 2025.12.08
Python version : 3.14.2 (main, Dec 9 2025, 17:57:34) [GCC 14.2.1 20250405]
Processor :
Machine type : x86_64
Architecture : 64bit, ELF
Platform : Linux-6.12.63_1-x86_64-with-musl1
sys.stdout.enc : utf-8
default enc : utf-8
Config dir : /home/althea/.config/mps-youtube
dbus : 1.3.2
glib : True
env:TERM : st-256color
env:SHELL : /bin/fish
env:LANG : en_US.UTF-8Source: mps-youtube/yewtube