Merge pull request #12004 from mshabunin:more-asserts
authorAlexander Alekhin <alexander.a.alekhin@gmail.com>
Mon, 30 Jul 2018 16:42:09 +0000 (16:42 +0000)
committerAlexander Alekhin <alexander.a.alekhin@gmail.com>
Mon, 30 Jul 2018 16:42:09 +0000 (16:42 +0000)

Trivial merge