Tribler does not start - "TypeError: arguments did not match any overloaded call: QPoint(): too many arguments"

[G-P-L]

I am an Arch Linux user and did not use Tribler for some week and after that the app won't start with the following error in the log:

[PID:70515] 2021-12-26 17:45:42,157 - INFO - TriblerApplication(23) - Start Tribler application. Win id: "triblerapp". Sys argv: "['/opt/Tribler/run_tribler.py']"
[PID:70515] 2021-12-26 17:45:42,349 - INFO - TriblerApplication(51) - No running instances (socket error: 2)
[PID:70515] 2021-12-26 17:45:42,538 - INFO - tribler_gui(454) - Available Tribler translations {'Russian': 'ru_RU', 'Portuguese': 'pt_BR', 'Chinese': 'zh_CN', 'English': 'en_US'}
[PID:70515] 2021-12-26 17:45:42,539 - INFO - tribler_gui(455) - System language: ['hu-HU'], Tribler language: ['hu', 'hu-HU', 'hu-Latn-HU']
[PID:70515] 2021-12-26 17:45:42,539 - INFO - __main__(208) - Start Tribler Window
[PID:70515] 2021-12-26 17:45:42,572 - INFO - NetworkUtils(30) - Looking for first free port in range [52194..52294]
[PID:70515] 2021-12-26 17:45:42,572 - INFO - NetworkUtils(34) - 52194 is free
[PID:70515] 2021-12-26 17:45:43,984 - INFO - TriblerGUI(147) - Will connect to events endpoint
[PID:70515] 2021-12-26 17:45:43,989 - ERROR <error_handler:37> ErrorHandler.gui_error(): Traceback (most recent call last):
  File "/opt/Tribler/run_tribler.py", line 209, in <module>
    window = TriblerWindow(settings)
  File "/opt/Tribler/tribler-gui/tribler_gui/tribler_window.py", line 275, in __init__
    pos = self.gui_settings.value("pos", QPoint(center.x() - self.width() * 0.5, center.y() - self.height() * 0.5))
TypeError: arguments did not match any overloaded call:
  QPoint(): too many arguments
  QPoint(int, int): argument 1 has unexpected type 'float'
  QPoint(QPoint): argument 1 has unexpected type 'float'

[PID:70515] 2021-12-26 17:45:43,991 - INFO - SentryReporter(286) - Event from exception: arguments did not match any overloaded call:
  QPoint(): too many arguments
  QPoint(int, int): argument 1 has unexpected type 'float'
  QPoint(QPoint): argument 1 has unexpected type 'float'
[PID:70515] 2021-12-26 17:45:44,002 - INFO - SentryReporter(358) - Before send strategy: SentryStrategy.SEND_SUPPRESSED
Sentry is attempting to send 1 pending error messages

I am the Tribler package maintainer for the Arch Linux/AUR and at least one other user also reported the exact same issue with the same error message, so I thought this is an Arch-specific problem. I thought one of the Qt or Python update is the cause of this behavior, but I could not triangulate which one. I tried to downgrade several suspicious package which was upgraded in the meantime to pinpoint the issue, but no luck.
Beside version 7.10 I also tried 7.11-RC2, but it has the same issue.
I am pleased to provide more information If necessary to solve this problem.

[ichorid]

Thanks for reporting! This seems to be a residue (pun intended) of Python 2 to 3 migration. We'll try to fix that in 7.11

[ichorid]

Could you please try this branch? #6687

[G-P-L]

The original error gone, but still crashes at start, but with a different error message:

tribler_gui.utilities.CreationTraceback: 
  File "/mnt/Adat/Ideiglenes/tribler/src/run_tribler.py", line 128, in <module>
    sys.exit(app.exec_())
  File "/mnt/Adat/Ideiglenes/tribler/src/tribler-gui/tribler_gui/utilities.py", line 372, in trackback_wrapper
    callback(*args, **kwargs)
  File "/mnt/Adat/Ideiglenes/tribler/src/tribler-gui/tribler_gui/core_manager.py", line 102, in on_request_error
    self.start_tribler_core(core_args=core_args, core_env=core_env)
  File "/mnt/Adat/Ideiglenes/tribler/src/tribler-gui/tribler_gui/core_manager.py", line 182, in start_tribler_core
    connect(self.core_process.finished, self.on_core_finished)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/mnt/Adat/Ideiglenes/tribler/src/tribler-gui/tribler_gui/utilities.py", line 375, in trackback_wrapper
    raise exc from CreationTraceback(traceback_str)
  File "/mnt/Adat/Ideiglenes/tribler/src/tribler-gui/tribler_gui/utilities.py", line 372, in trackback_wrapper
    callback(*args, **kwargs)
  File "/mnt/Adat/Ideiglenes/tribler/src/tribler-gui/tribler_gui/core_manager.py", line 92, in on_core_finished
    raise CoreCrashedError(exception_msg)
tribler_gui.exceptions.CoreCrashedError: The Tribler core has unexpectedly finished with exit code 1 and status: 0!

Traceback (most recent call last):
  File "/mnt/Adat/Ideiglenes/tribler/src/run_tribler.py", line 68, in <module>

(Timestamp: 1640606741727, traceback timestamp: 1640606741547)
Traceback (most recent call last):
  File "/mnt/Adat/Ideiglenes/tribler/src/run_tribler.py", line 68, in <module>

[ichorid]

In the current version, we can't see what happened at the Core console - the crash happens too soon, before the Sentry init. Could you please run Core standalone like this: env CORE_PROCESS=1 src/tribler.sh and post the console output here?

[G-P-L]

Of course, this is what I got:

$ env CORE_PROCESS=1 src/tribler.sh
INFO:__main__:Sentry has been initialised in normal mode
INFO:__main__:Root state dir: /home/gudmannpeter/.Tribler
INFO:__main__:Running in "core" mode
Traceback (most recent call last):
  File "/mnt/Adat/Ideiglenes/tribler/src/run_tribler.py", line 63, in <module>
    base_path = os.environ['CORE_BASE_PATH']
  File "/usr/lib/python3.10/os.py", line 679, in __getitem__
    raise KeyError(key) from None
KeyError: 'CORE_BASE_PATH'

[ichorid]

Well, sir, Python 3.10 is officially not supported by Tribler yet. There are many reasons for that, PonyORM incompatibility in particular 🤷

[ichorid]

And try running it like this: env CORE_PROCESS=1 CORE_BASE_PATH=./src/tribler-core/tribler_core CORE_API_PORT=1234 src/tribler.sh (in the toplevel repository dir) just in case...

[G-P-L]

Mistery solved. :) Then I will retest your solution with Python 3.9 in a conda environment. The rolling release nature of Arch sometimes causes issues like this.