Bug: Portrait-orientation images producing very distorted jpeg output

[Annabel2]

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Computer's operating system

Linux

What GPU do you have ?

No GPU

Ansel version

Ansel-0.0.0+1996~gb51cfa3-x86_64.AppImage

Type of binary

Pre-built packages provided by the Ansel project (.AppImage, .EXE)

What happened?

I exported a bunch of photos and the few that were shot portrait mode have rendered incorrectly, as if they have had a shear (I think that is the term) applied; they have been distorted by about 45 degrees. I output an individual one to double check but same result. If I switch off orientation the image renders properly except it's now 90 degrees rotated of course.

Does your problem occur with OpenCL enabled ?

I don't know

Does your problem occur with OpenCL disabled ?

Yes

Previous Ansel version that use to work

No response

Output of ansel -d all

Backtrace

[Annabel2]

Trying to get an example I can post but it's not happening, and going back to the ones misbehaving when I created this issue, they are ok now. I'll look out for the problem happening again.

[Annabel2]

In case it sheds any light, here is how the image looked. It is a family snap, so I don't want to post the whole thing, and so far the error has only occurred on several portrait-mode shots like the one here. Here is the lower part of the image, about 2/5ths of it, correctly rendered yesterday, and wrongly rendered a week ago, both build 1996.