[maria-buildbot-reports] buildbot failure in MariaDB on kvm-rpm-centos73-amd64

[Maria Buildbot Reports]

The Buildbot has detected a failed build on builder kvm-rpm-centos73-amd64 while building MariaDB.
Full details are available at:
 http://buildbot.askmonty.org/buildbot/builders/kvm-rpm-centos73-amd64/builds/3546

Buildbot URL: http://buildbot.askmonty.org/buildbot/

Buildslave for this Build: aidi

Build Reason: Triggerable(kvm-sched-alltrees)
Build Source Stamp: [branch 10.2] ec97aba28462aab18137f96317c4b441385df12a
Blamelist: Monty <monty at mariadb.org>

BUILD FAILED: failed mtr_centos_mix

sincerely,
 -The Buildbot