Merge pull request #16417 from jmcclelland/1555b
authorEileen McNaughton <emcnaughton@wikimedia.org>
Wed, 29 Jan 2020 19:54:18 +0000 (08:54 +1300)
committerGitHub <noreply@github.com>
Wed, 29 Jan 2020 19:54:18 +0000 (08:54 +1300)
avoid undefined offset and uninitialized key errors on upgrade - dev/core#1555


Trivial merge