Control: found linux/4.14.12-1 +1 for this also shows up in 4.14. It blocks building spl, and therefore blocks migration for zfs users.
This also looks to have been reported a few months ago: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833500
- Bug#886366: linux-headers-4.15.0-rc5-amd64: missing to... Luca Boccassi
- Bug#886366: same issue with 4.14.0-3-amd64 Alexandra Kossovsky
- Bug#886366: [src:linux] Antonio Russo
