I tried to update gnome-shell to 2.91.3. First I got some trouble emerging gobject-introspection, dconf..., thats working now. But now emerging gtk+ fails. See Build Log Reproducible: Always Steps to Reproduce: 1. emerge -av1 gtk+ 2. 3.
Created attachment 257949 [details] build.log
Created attachment 257951 [details] emerge --info
There is already a new ebuild x11-libs/gtk+-2.91.7. This works for me!