It seems like someone made a little oversight when they bumped dev-util/kdevplatform to 5.1.0, its build is failing with the error:
>>> Emerging (8 of 12) dev-util/kdevplatform-5.1.0::gentoo
!!! Fetched file: kdevplatform-5.1.tar.xz VERIFY FAILED!
!!! Reason: Insufficient data for checksum verification
!!! Got:
!!! Expected: MD5 RMD160 SHA1 SHA256 SHA512 WHIRLPOOL
- Fetch failed for 'dev-util/kdevplatform-5.1.0', Log file:
- '/var/tmp/portage/dev-util/kdevplatform-5.1.0/temp/build.log'