QGIS » QGIS Application

OK, that one is odd. A critical bug in the wms provider is triggered by the browser panel's preview under a specific set of circumstances.

1. Launch QGIS and open the browser panel
2. Add a XYZ item to the browser panel's XYZ node (use the following URL: https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x})
3. Make sure the newly-added XYZ item isn't selected yet
4. Activate the preview section of the browser panel
5. Select the newly-added XYZ item (do not open the preview tab)
6. Double-click on the XYZ item to add it to the main canvas
7. At that stage, if your console is open, you'll see a flood of messages (see video https://www.youtube.com/watch?v=Ab0q0Pr5zYs&feature=youtu.be)
8. If you try to shutdown QGIS, it'll freeze, stuck in the infinite loop of console debug messages
9. Alternatively, if you open the preview tab in the browser panel, the console flood stops, and QGIS will exit properly

I'm attaching the debug log output in case it's of help.