buildbot failure in Python on AMD64 FreeBSD 10.x Shared 3.x

The Buildbot has detected a new failure on builder AMD64 FreeBSD 10.x Shared 3.x while building python/cpython. Full details are available at: http://buildbot.python.org/all/builders/AMD64%20FreeBSD%2010.x%20Shared%203....
Buildbot URL: http://buildbot.python.org/all/
Buildslave for this Build: koobs-freebsd10
Build Reason: The SingleBranchScheduler scheduler named '3.x' triggered this build Build Source Stamp: [branch master] 00561189fb5d85826cfc907e3a72361e1a39a591 Blamelist: Victor Stinner <victor.stinner@gmail.com>
BUILD FAILED: failed test
Sincerely, -The Buildbot

http://bugs.python.org/issue30818 "Warning -- asyncore.socket_map was modified by test_ftplib on AMD64 FreeBSD 10.x Shared 3.x"
FYI I modified regrtest on master to make tests failing if the environment is altered.
Victor
2017-06-30 16:58 GMT+02:00 <buildbot@python.org>:
The Buildbot has detected a new failure on builder AMD64 FreeBSD 10.x Shared 3.x while building python/cpython. Full details are available at: http://buildbot.python.org/all/builders/AMD64%20FreeBSD%2010.x%20Shared%203....
Buildbot URL: http://buildbot.python.org/all/
Buildslave for this Build: koobs-freebsd10
Build Reason: The SingleBranchScheduler scheduler named '3.x' triggered this build Build Source Stamp: [branch master] 00561189fb5d85826cfc907e3a72361e1a39a591 Blamelist: Victor Stinner <victor.stinner@gmail.com>
BUILD FAILED: failed test
Sincerely, -The Buildbot
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Victor Stinner