It appears something has changed in the past few weeks (with no changes made to the buildbot worker).

Now only 3.5 branch (both debug and non-debug) builders are failing, except there are now many failing tests, many different errors, and test clean is also failing.

Among others errors:

FileExistsError: [Errno 17] File exists: '@test_42517_tmp/TEST1/SUB1/SUB11'
PermissionError: [Errno 1] Operation not permitted: '@test_42517_tmp'
IsADirectoryError: [Errno 21] Is a directory: '@test_42517_tmp'
PermissionError: [Errno 13] Permission denied: 'SUB21'

Attached is the full log.

Looking into some of the test_xxxxx_tmp directories referenced, I see a SUB21 directory created with no permissions

[root@CURRENT-amd64:/usr/home/buildbot/python/3.5.koobs-freebsd-current/build/build/test_python_85793/@test_85793_tmp/TEST1/SUB2.new] ls -la
total 5
drwx------  3 buildbot  buildbot    5 Nov 11 16:44 .
drwx------  3 buildbot  buildbot    4 Nov 11 16:44 ..
lrwx------  1 buildbot  buildbot   11 Nov 11 16:44 broken_link2 -> tmp3/broken
lrwx------  1 buildbot  buildbot  103 Nov 11 16:44 link -> /usr/home/buildbot/python/3.5.koobs-freebsd-current/build/build/test_python_85793/@test_85793_tmp/TEST2
d---------  2 buildbot  buildbot    3 Nov 11 16:44 SUB21

This is observed across all test_python_xxxx directories:

[root@CURRENT-amd64:/usr/home/buildbot/python/3.5.koobs-freebsd-current/build/build] find . -perm 000
./test_python_85793/@test_85793_tmp/TEST1/SUB2.new/SUB21
./test_python_96334/@test_96334_tmp/TEST1/SUB2.new/SUB21
./test_python_53788/@test_53788_tmp/TEST1/SUB2.new/SUB21
./test_python_56622/@test_56622_tmp/TEST1/SUB2.new/SUB21
./test_python_38482/@test_38482_tmp/TEST1/SUB2.new/SUB21
./test_python_58380/@test_58380_tmp/TEST1/SUB2.new/SUB21
./test_python_42517/@test_42517_tmp/TEST1/SUB2.new/SUB21