Thanks a lot for the detailed analysis and trial patch. I have already created
an upstream issue [1] for this bug
some weeks ago but my proposed patch isn't really working and just a really
poor shot in the dark.
I am adding the URL to the upstream bug report and will also give your patch a
try on the Debian sparc64 porterbox.
Thanks for that! I can see that upstream has already identified the issue, but
it seems like they're unsure about how to address it properly.
By the way: I do intend to test my patch, but building gtk4 takes a whole day
on my Ultra 10.
