[macOS] sensors_battery segfaults on macOS

[marsam]

Platform

• macOS
• psutil 5.7.0 / psutil master at ea4887e
• python3.7

Bug description
tests/test_system.py fails on macOS because sensors_battery is called on tests/__init__.py evaluation and it segfaults

psutil/psutil/tests/__init__.py

Line 175 in ea4887e

HAS_BATTERY = HAS_SENSORS_BATTERY and bool(psutil.sensors_battery())

Test results

============================= test session starts ==============================
platform darwin -- Python 3.7.6, pytest-5.3.5, py-1.8.1, pluggy-0.13.1
rootdir: /nix/store/r5znpynv6m1a9n7w8l8vd5h14clii8a4-python3.7-psutil-5.7.0/lib/python3.7/site-packages/psutil/tests
collecting ... Fatal Python error: Segmentation fault

Current thread 0x00007fff94f4b3c0 (most recent call first):
  File "/nix/store/r5znpynv6m1a9n7w8l8vd5h14clii8a4-python3.7-psutil-5.7.0/lib/python3.7/site-packages/psutil/_psosx.py", line 217 in sensors_battery
  File "/nix/store/r5znpynv6m1a9n7w8l8vd5h14clii8a4-python3.7-psutil-5.7.0/lib/python3.7/site-packages/psutil/__init__.py", line 2289 in sensors_battery
  File "/nix/store/r5znpynv6m1a9n7w8l8vd5h14clii8a4-python3.7-psutil-5.7.0/lib/python3.7/site-packages/psutil/tests/__init__.py", line 175 in <module>
  File "<frozen importlib._bootstrap>", line 219 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 728 in exec_module
  File "<frozen importlib._bootstrap>", line 677 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 967 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 983 in _find_and_load
  File "<frozen importlib._bootstrap>", line 219 in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 953 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 983 in _find_and_load
  File "/nix/store/czp18gp07v8ky547m54sacip2rzc5q9p-python3.7-py-1.8.1/lib/python3.7/site-packages/py/_path/local.py", line 701 in pyimport
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/python.py", line 493 in _importtestmodule
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/python.py", line 425 in _getobj
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/python.py", line 249 in obj
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/python.py", line 441 in _inject_setup_module_fixture
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/python.py", line 428 in collect
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/runner.py", line 257 in <lambda>
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/runner.py", line 237 in from_call
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/runner.py", line 257 in pytest_make_collect_report
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/runner.py", line 379 in collect_one_node
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 721 in genitems
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 496 in _perform_collect
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 458 in perform_collect
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 256 in pytest_collection
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 246 in _main
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 197 in wrap_session
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/main.py", line 240 in pytest_cmdline_main
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/nix/store/6kwgl4ws7rrlxfn7ckz5nq08nrizfka1-python3.7-pluggy-0.13.1/lib/python3.7/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/lib/python3.7/site-packages/_pytest/config/__init__.py", line 93 in main
  File "/nix/store/gfvb69d2jn49scj826dbsilk19005dki-python3.7-pytest-5.3.5/bin/.pytest-wrapped", line 9 in <module>
/nix/store/hjysymfn0i88vdn0dny8f6jy44bnybx9-stdenv-darwin/setup: line 1312: 48196 Segmentation fault: 11  pytest $out/lib/python3.7/site-packages/psutil/tests/test_system.py -k 'not user \
      and not disk_io_counters and not sensors_battery \
      and not cpu_times'