this also fails in jenkins on freeBSD (for the past 42 builds, starting with the build at d73c32c17fa6a59701bfdbfd78055f6d8c7c3d36. the problem did not occur at 4c97cb13bdcc1f11ee75ae84068e2a8e59200430)

https://jenkins.isc.org/view/BIND/job/bind9-master-freebsd11-64/lastCompletedBuild/testReport/