May be related to https://bugs.python.org/issue36632

On Mon, 29 Apr 2019 at 19:48, Pablo Galindo Salgado <pablogsal@gmail.com> wrote:
Some race condition in the multiprocessing module:

== Tests result: ENV CHANGED ==
389 tests OK.
10 slowest tests:
- test_multiprocessing_spawn: 20 min 37 sec
- test_zipfile: 14 min 29 sec
- test_concurrent_futures: 7 min 19 sec
- test_tarfile: 6 min 59 sec
- test_lzma: 5 min 52 sec
- test_distutils: 5 min 28 sec
- test_regrtest: 5 min 19 sec
- test_venv: 4 min 24 sec
- test_asyncio: 4 min 22 sec
- test_pickle: 3 min 30 sec
1 test altered the execution environment:
    test_multiprocessing_spawn

New builds are successful. 

On Mon, 29 Apr 2019 at 15:21, <buildbot@python.org> wrote:
The Buildbot has detected a failed build on builder x86 Windows7 3.x while building python/cpython.
Full details are available at:
    https://buildbot.python.org/all/#builders/58/builds/2292

Buildbot URL: https://buildbot.python.org/all/

Worker for this Build: bolen-windows7

Build Reason: <unknown>
Blamelist: Pablo Galindo <Pablogsal@gmail.com>

BUILD FAILED: failed test (failure)

Sincerely,
 -The Buildbot
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