Dark line at top/side of photo

Is there an existing issue for this?

• I checked and did not find my issue in the already reported ones

Describe the bug

In certain images, a dark line appears at the top/right side for vertical/horizontal photos, respectively.

Vertically oriented photo

.ORF raw opened in darktable, showing dark band at top

SOOC jpg

Horizontally oriented photo

.ORF raw opened in darktable, showing dark band at top	SOOC jpg
!

Camera: Olympus OM-D EM5 Mark II
Lens: Olympus 12-40 mm f/2.8

Steps to reproduce

1. Open photo in darkroom tab, do not apply any modules other than default

Expected behavior

darktable should not show a dark line at the border

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

darktable.org / GitHub release

darktable version

5.6.0

What OS are you using?

Windows

What is the version of your OS?

Windows 11 Home

Describe your system

No response

Are you using OpenCL GPU in darktable?

Yes

If yes, what is the GPU card and driver?

AMD Radeon RX 9070 XT

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

Photos I used (jpgs and raws)
P7079112.zip
P7109532.zip

Lens correction does not completely hide the dark line, whether using embedded metadata or lensfun database.

The line appears in the exported photo.

The issue can be resolved by cropping every image with this issue, but this is tedious and not something I want in my workflow.

Reproduce the issue in darktable 5.6.0 on Windows 11 using the attached P7079112.zip and P7109532.zip files, opening the photos in the darkroom tab with default modules. Compare vertical and horizontal ORF and JPEG results with and without lens correction, and confirm that the dark border is absent from the exported photo when the issue is fixed.