I'm seeing the same error on Ubuntu LTS 16.04.6 on an ARM64 platform.

$ make && make test

...

0:09:18 load avg: 2.09 [ 78/416] test_complex
0:09:20 load avg: 2.08 [ 79/416] test_concurrent_futures

Traceback:
 Thread 0x0000007f6ffff1f0 (most recent call first):
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 296 in wait
  File "/home/minit/Python-3.7.4/Lib/multiprocessing/queues.py", line 224 in _feed
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 870 in run
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 926 in _bootstrap_inner
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 890 in _bootstrap

Thread 0x0000007f93fff1f0 (most recent call first):
  File "/home/minit/Python-3.7.4/Lib/selectors.py", line 415 in select
  File "/home/minit/Python-3.7.4/Lib/multiprocessing/connection.py", line 920 in wait
  File "/home/minit/Python-3.7.4/Lib/concurrent/futures/process.py", line 361 in _queue_management_worker
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 870 in run
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 926 in _bootstrap_inner
  File "/home/minit/Python-3.7.4/Lib/threading.py", line 890 in _bootstrap

Current thread 0x0000007fa6296000 (most recent call first):
  File "/home/minit/Python-3.7.4/Lib/test/test_concurrent_futures.py", line 917 in _fail_on_deadlock
  File "/home/minit/Python-3.7.4/Lib/test/test_concurrent_futures.py", line 978 in test_crash
  File "/home/minit/Python-3.7.4/Lib/unittest/case.py", line 628 in run
  File "/home/minit/Python-3.7.4/Lib/unittest/case.py", line 676 in __call__
  File "/home/minit/Python-3.7.4/Lib/unittest/suite.py", line 122 in run
  File "/home/minit/Python-3.7.4/Lib/unittest/suite.py", line 84 in __call__
  File "/home/minit/Python-3.7.4/Lib/unittest/suite.py", line 122 in run
  File "/home/minit/Python-3.7.4/Lib/unittest/suite.py", line 84 in __call__
  File "/home/minit/Python-3.7.4/Lib/unittest/suite.py", line 122 in run
  File "/home/minit/Python-3.7.4/Lib/unittest/suite.py", line 84 in __call__
  File "/home/minit/Python-3.7.4/Lib/test/support/testresult.py", line 162 in run
  File "/home/minit/Python-3.7.4/Lib/test/support/__init__.py", line 1915 in _run_suite
  File "/home/minit/Python-3.7.4/Lib/test/support/__init__.py", line 2011 in run_unittest
  File "/home/minit/Python-3.7.4/Lib/test/test_concurrent_futures.py", line 1245 in test_main
  File "/home/minit/Python-3.7.4/Lib/test/support/__init__.py", line 2143 in decorator
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/runtest.py", line 228 in _runtest_inner2
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/runtest.py", line 264 in _runtest_inner
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/runtest.py", line 149 in _runtest
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/runtest.py", line 187 in runtest
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/main.py", line 390 in run_tests_sequential
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/main.py", line 488 in run_tests
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/main.py", line 642 in _main
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/main.py", line 588 in main
  File "/home/minit/Python-3.7.4/Lib/test/libregrtest/main.py", line 663 in main
  File "/home/minit/Python-3.7.4/Lib/test/regrtest.py", line 46 in _main
  File "/home/minit/Python-3.7.4/Lib/test/regrtest.py", line 50 in <module>
  File "/home/minit/Python-3.7.4/Lib/runpy.py", line 85 in _run_code
  File "/home/minit/Python-3.7.4/Lib/runpy.py", line 193 in _run_module_as_main

test test_concurrent_futures failed