Can't write pyramids to separate .ovr file if raster file is read-only

[qgib]

Author Name: Alister Hood (@AlisterH)
Original Redmine Issue: 6185
Affected QGIS version: master
Redmine category:rasters

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Make a jpeg file read-only.
Load the jpeg into QGIS.
Right-click the jpeg layer in the TOC
Choose Properties>Pyramids
Select a pyramid resolution and click the "build pyramids" button.

You will get an error message: "Write access denied>Adjust the file permissions and try again".
But the file permissions on the jpeg file should not matter, because the pyramids would be saved in a separate .ovr file!
I believe the same should apply regardless of the image format, as long as the option "Build pyramids internally if possible" is not selected.

[qgib]

Author Name: Paolo Cavallini (@pcav)

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• fixed_version_id was configured as Version 2.0.0

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• fixed_version_id was changed from Version 2.0.0 to Future Release - Lower Priority

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0
• regression was configured as 0

[qgib]

Author Name: Giovanni Manghi (@gioman)

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End of life notice: QGIS 2.18 LTR
*
Source:*
http://blog.qgis.org/2019/03/09/end-of-life-notice-qgis-2-18-ltr/

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• resolution was changed from to end of life
• status_id was changed from Open to Closed

[qgib]

Author Name: Alister Hood (@AlisterH)

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Seems to have been fixed at some point.

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• resolution was changed from end of life to worksforme
• description was changed from Make a jpeg file read-only.
  Load the jpeg into QGIS.
  Right-click the jpeg layer in the TOC
  Choose Properties>Pyramids
  Select a pyramid resolution and click the "build pyramids" button.

You will get an error message: "Write access denied>Adjust the file permissions and try again".
But the file permissions on the jpeg file should not matter, because the pyramids would be saved in a separate .ovr file!
I believe the same should apply regardless of the image format, as long as the option "Build pyramids internally if possible" is not selected. to Make a jpeg file read-only.
Load the jpeg into QGIS.
Right-click the jpeg layer in the TOC
Choose Properties>Pyramids
Select a pyramid resolution and click the "build pyramids" button.

You will get an error message: "Write access denied>Adjust the file permissions and try again".
But the file permissions on the jpeg file should not matter, because the pyramids would be saved in a separate .ovr file!
I believe the same should apply regardless of the image format, as long as the option "Build pyramids internally if possible" is not selected.