Spyder: QtWebEngineProcess _CFURLCopyResourcePropertyValuesAndFlags failed

[ptoche]

After starting Spyder 4.1.2 on Python 3.7.6 64-bit | Qt 5.9.6 | PyQt5 5.9.2 | Darwin 19.4.0, a terminal window opens with the following message:

Patricks-MacBook-Pro ~ % /Applications/spyder ; exit;
2020-05-09 14:02:17.836 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:17.877 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:17.902 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:17.925 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:17.950 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.010 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.041 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.067 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.092 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.111 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.114 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme
2020-05-09 14:02:18.119 QtWebEngineProcess[18078:5767743] _CFURLCopyResourcePropertyValuesAndFlags failed because it was passed an URL which has no scheme

Not a big deal as it doesn't appear to cause any problems otherwise.

[ccordoba12]

Thanks for reporting. We haven't seen this error before, but we'll leave it open in case other people can let us know what's causing it.

[ptoche]

Thanks! This should be the lowest priority as it is not causing any apparent problems.

[ptoche]

I have since done a clean install of miniconda3 and spyder inside a conda environment, after cleaning up many (but almost certainly not all) residues on my system, and I have not experienced this issue. The current version of Python shipped with miniconda3 is 3.7, but I immediately upgraded to 3.8 before installing Spyder.

[ptoche]

I'm therefore closing.

[ptoche]

And... it's baack! :-)

[xhain]

I can verify this behavior after updating to OSX Catalina. It doesn't have any effect on usability that I'm aware of, but it "spams" the terminal with this error on launch.

I'm running:

• Spyder 4.0.1
• OSX 10.15.5 (19F101)
• Python 3.7.6

[ccordoba12]

This should be fixed when we update to a more recent version of Qt/PyQt. For now there's nothing to do, sorry.