wms (xyz) provider throws an infinite amount of console debug msg under specific circumstances

[qgib]

Author Name: Mathieu Pellerin - nIRV (Mathieu Pellerin - nIRV)
Original Redmine Issue: 20362
Affected QGIS version: 3.5(master)
Redmine category:web_services_clients/wms

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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.

Steps to reproduce

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.

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• qgis.log (Mathieu Pellerin - nIRV)

[qgib]

Author Name: Mathieu Pellerin - nIRV (Mathieu Pellerin - nIRV)

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• description was changed from 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.

Steps to reproduce

Launch QGIS and open the browser panel

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})

Make sure the newly-added XYZ item isn't selected yet

Activate the preview section of the browser panel

Select the newly-added XYZ item (do not open the preview tab)

Double-click on the XYZ item to add it to the main canvas

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)

If you try to shutdown QGIS, it'll freeze, stuck in the infinite loop of console debug messages

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

Steps to reproduce

Launch QGIS and open the browser panel

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})

Make sure the newly-added XYZ item isn't selected yet

Activate the preview section of the browser panel

Select the newly-added XYZ item (do not open the preview tab)

Double-click on the XYZ item to add it to the main canvas

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)

If you try to shutdown QGIS, it'll freeze, stuck in the infinite loop of console debug messages

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.

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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Applied in changeset c54c559.

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• done_ratio was changed from 0 to 100
• status_id was changed from Open to Closed