10 tests failed:
    test_atexit test_capi test_datetime test_embed test_exceptions
    test_import test_interpreters test_multibytecodec test_syslog
    test_threading

FAIL: test_memory_error_in_subinterp (test.test_exceptions.ExceptionTests.test_memory_error_in_subinterp)

0:03:13 load avg: 1.23 [ 92/479/2] test_datetime worker non-zero exit code (Exit code -6 (SIGABRT))

python: Objects/object.c:196: _PyRefchain_Remove: Assertion `value == REFCHAIN_VALUE' failed.

0:08:52 load avg: 1.82 [217/479/5] test_atexit worker non-zero exit code (Exit code -6 (SIGABRT))