macOS CI failing

[dstansby]

macOS tests have started failing, with no obvious culprit. The last passing test run is here, and an example failing run here.

The error is in test_vlen_bytes.py::test_encode_none :

 Fatal Python error: Aborted

Current thread 0x00007ff85e49a9c0 (most recent call first):
  File "/Users/runner/work/numcodecs/numcodecs/numcodecs/tests/test_vlen_bytes.py", line 90 in test_encode_none
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/python.py", line 159 in pytest_pyfunc_call
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/python.py", line 1627 in runtest
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/runner.py", line 174 in pytest_runtest_call
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/runner.py", line 242 in <lambda>
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/runner.py", line 341 in from_call
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/runner.py", line 241 in call_and_report
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/runner.py", line 132 in runtestprotocol
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/runner.py", line 113 in pytest_runtest_protocol
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/main.py", line 362 in pytest_runtestloop
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/main.py", line 337 in _main
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/main.py", line 283 in wrap_session
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/main.py", line 330 in pytest_cmdline_main
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/config/__init__.py", line 175 in main
  File "/Users/runner/miniconda3/envs/test/lib/python3.11/site-packages/_pytest/config/__init__.py", line 201 in console_main
  File "/Users/runner/miniconda3/envs/test/bin/pytest", line 8 in <module>

Extension modules: numpy._core._multiarray_umath, numpy.linalg._umath_linalg, numcodecs.compat_ext, numcodecs.blosc, numcodecs.zstd, numcodecs.lz4, numcodecs._shuffle, numcodecs.jenkins, crc32c._crc32c, numcodecs.vlen, numcodecs.fletcher32, msgpack._cmsgpack, numpy.random._common, numpy.random.bit_generator, numpy.random._bounded_integers, numpy.random._mt19937, numpy.random.mtrand, numpy.random._philox, numpy.random._pcg64, numpy.random._sfc64, numpy.random._generator (total: 21)
/Users/runner/work/_temp/7d2eafc4-94de-4bcd-acc8-5e21a4e9db3a.sh: line 1: 12992 Abort trap: 6           pytest -v
numcodecs/tests/test_vlen_bytes.py::test_encode_none 

[dstansby]

The only differences in the coda environment are
conda version : 24.11.0 / conda version : 24.11.2