JPEG XL - consistent crash on exporting a file with a transparent background.

[Intuos5]

JPEG XL export consistently crashes with transparent background exports in the latest release 2.0.4 and on the beta 2.1.0.1742 on Windows 10.0.19045.

Steps to reproduce

1. Create a new document with a transparent background

2. Add a rectangle

3. Go to File > Export ...

4. Use these settings:

5. Using high Quality settings you'll see the export fail or the file crash with the export dialog loading

6. Best quality apparently immediately hard crashes the app as well from the export dialog, since that was the version I last used, I can't show my settings for export.

[AffinityMakesMeWonder]

This crashing don’t happen on iPad since beta 1742/43 of v2.10…

Made a document as above, and it export it without any problem…

I had crashes in earlier betaversions of v2.10 with this JPG-XL…

[DWright]

Can you please confirm the specifications of your PC as I have not been able to replicate this export crash on my PC following your workflow.

[Intuos5]

Mmm... I ended up getting a couple of other issues as well with other programs so I decided to reboot my PC. For now it appears to be working again. JPEG XL exports had worked fine till I started exporting with a transparent background. Will keep an eye on it to see if the issue returns.