[issue19779] test_concurrent_futures crashes on 32-bit Windows Vista

[Tim Peters]

New submission from Tim Peters:

Worked OK yesterday, using current default branch in all cases.

C:\Code\Python\PCbuild>.\\python_d  -Wd -E -bb ../lib/test/regrtest.py test_concurrent_futures
[1/1] test_concurrent_futures
Fatal Python error: Segmentation fault

Current thread 0x00000590 (most recent call first):
  File "<frozen importlib._bootstrap>", line 882 in spec_from_file_location
  File "<frozen importlib._bootstrap>", line 1930 in _get_spec
  File "<frozen importlib._bootstrap>", line 1971 in find_spec
  File "<frozen importlib._bootstrap>", line 1834 in _get_spec
  File "<frozen importlib._bootstrap>", line 1860 in find_spec
  File "<frozen importlib._bootstrap>", line 2074 in _find_spec
  File "<frozen importlib._bootstrap>", line 2132 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 2147 in _find_and_load
  File "<frozen importlib._bootstrap>", line 303 in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 2194 in _handle_fromlist
  File "C:\Code\Python\lib\multiprocessing\popen_spawn_win32.py", line 8 in <module>
  File "<frozen importlib._bootstrap>", line 303 in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1422 in exec_module
  File "<frozen importlib._bootstrap>", line 1111 in _exec
  File "<frozen importlib._bootstrap>", line 1187 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 2136 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 2147 in _find_and_load
  File "C:\Code\Python\lib\multiprocessing\context.py", line 312 in _Popen
  File "C:\Code\Python\lib\multiprocessing\context.py", line 212 in _Popen
  File "C:\Code\Python\lib\multiprocessing\process.py", line 105 in start
  File "C:\Code\Python\lib\concurrent\futures\process.py", line 387 in _adjust_process_count
  File "C:\Code\Python\lib\concurrent\futures\process.py", line 368 in _start_queue_management_thread
  File "C:\Code\Python\lib\concurrent\futures\process.py", line 407 in submit
  File "C:\Code\Python\lib\test\test_concurrent_futures.py", line 83 in <listcomp>
  File "C:\Code\Python\lib\test\test_concurrent_futures.py", line 83 in _prime_executor
  File "C:\Code\Python\lib\test\test_concurrent_futures.py", line 70 in setUp
  File "C:\Code\Python\lib\unittest\case.py", line 567 in run
  File "C:\Code\Python\lib\unittest\case.py", line 610 in __call__
  File "C:\Code\Python\lib\unittest\suite.py", line 117 in run
  File "C:\Code\Python\lib\unittest\suite.py", line 79 in __call__
  File "C:\Code\Python\lib\unittest\suite.py", line 117 in run
  File "C:\Code\Python\lib\unittest\suite.py", line 79 in __call__
  File "C:\Code\Python\lib\unittest\suite.py", line 117 in run
  File "C:\Code\Python\lib\unittest\suite.py", line 79 in __call__
  File "C:\Code\Python\lib\test\support\__init__.py", line 1584 in run
  File "C:\Code\Python\lib\test\support\__init__.py", line 1685 in _run_suite
  File "C:\Code\Python\lib\test\support\__init__.py", line 1719 in run_unittest
  File "C:\Code\Python\lib\test\test_concurrent_futures.py", line 673 in test_main
  File "C:\Code\Python\lib\test\support\__init__.py", line 1831 in decorator
  File "../lib/test/regrtest.py", line 1278 in runtest_inner
  File "../lib/test/regrtest.py", line 978 in runtest
  File "../lib/test/regrtest.py", line 763 in main
  File "../lib/test/regrtest.py", line 1562 in main_in_temp_cwd
  File "../lib/test/regrtest.py", line 1587 in <module>

Running with -v suggests it's dying in test_submit_keyword:

...
test_no_stale_references (test.test_concurrent_futures.ProcessPoolExecutorTest) ... 0.88s ok
test_shutdown_race_issue12456 (test.test_concurrent_futures.ProcessPoolExecutorTest) ... 0.88s ok
test_submit (test.test_concurrent_futures.ProcessPoolExecutorTest) ... 0.88s ok
test_submit_keyword (test.test_concurrent_futures.ProcessPoolExecutorTest) ...

And then a box pops up complaining that python_d stopped working.

----------
messages: 204418
nosy: tim.peters
priority: normal
severity: normal
status: open
title: test_concurrent_futures crashes on 32-bit Windows Vista
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19779>
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