hoe-3.15.3 has redepend on <rake-12.0 which creates a blocker in paludis when rake-12.0 is needed for ruby-2.4
Also, hoe will not build with the new rake. If you want a new bug let me know
There is not a lot we can do about this. This should be fixed upstream.
The same here, 'emerge -uvDN world' is blocked by this issue.
A workaround would be highly appreciated.
See also https://github.com/seattlerb/hoe/issues/77 and https://github.com/seattlerb/hoe/pull/78 for upstream discussion. (Unfortunately I can't set the See-Also field of a bug I haven't created.) The author of the latter apparently did some testing of hoe with rake 12 and did not observe any issues, contrary to what Harris wrote in comment 1. It might make sense to figure out whether these issues are reproducible, and whether they are Gentoo-specific. If they can be reproduced and are not specific to Gentoo, they should be communicated upstream. I don't have time to test this just now.
I just retested after a reboot. I changed the add_rdepend in the ebuild from <hoe-12.0.0 to <hoe-13.0.0 to prevent the call to downgrade rake I then was able to build hoe successfully. I have not tested it otherwise.
I have added hoe-3.15.3-r1 which includes an upstream patch for this.