dev-lang/python:3 has been unmasked in ~arch. while it does not set itself as the system python, emerge --depclean currently tries to uninstall python:2 since nothing depends on it. I'm not filing a 'portage doesn't work with python3' bug because I'm sure that's already being worked on, but in the meantime it would be nice to not have to explicitly put python:2 in my world file.
Created attachment 199874 [details] emerge --info
Thanks, this is fixed in cvs.