Description

The Python 3.8 CI job on macOS here is failing like this:

___________ ERROR collecting tests/python_package_test/test_arrow.py ___________
ImportError while importing test module '/Users/runner/work/LightGBM/LightGBM/tests/python_package_test/test_arrow.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
../../../miniforge/envs/test-env/lib/python3.8/importlib/init.py:127: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
tests/python_package_test/test_arrow.py:21: in
import pyarrow as pa # type: ignore
../../../miniforge/envs/test-env/lib/python3.8/site-packages/pyarrow/init.py:65: in
import pyarrow.lib as _lib
E ImportError: dlopen(/Users/runner/miniforge/envs/test-env/lib/python3.8/site-packages/pyarrow/lib.cpython-38-darwin.so, 0x0002): Symbol not found: _ZN4absl12lts_2024072212log_internal10LogMessagelsIiLi0EEERS2_RKT
E Referenced from: /Users/runner/miniforge/envs/test-env/lib/libprotobuf.28.2.0.dylib
E Expected in: /Users/runner/miniforge/envs/test-env/lib/libabsl_log_internal_message.2407.0.0.dylib
=========================== short test summary info ============================
ERROR tests/python_package_test/test_arrow.py
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
========================= 1 skipped, 1 error in 5.85s ==========================

(build link)

Reproducible example

Example build: https://github.com/microsoft/LightGBM/actions/runs/12585086008/job/35076093860?pr=6765

Environment info

LightGBM version or commit hash: f3bd64a

Additional Comments

I pulled the logs from a failed build (build link) and the last successful one, from a few days ago (build link).

There were just 3 changes in the conda environment:

-  libabseil          conda-forge/osx-64::libabseil-20240722.0-cxx17_hac325c4_1 
+  libabseil          conda-forge/osx-64::libabseil-20240722.0-cxx17_h0e468a2_2

-  libre2-11          conda-forge/osx-64::libre2-11-2024.07.02-hd530cb8_1 
+  libre2-11          conda-forge/osx-64::libre2-11-2024.07.02-h0e468a2_2

-  re2                conda-forge/osx-64::re2-2024.07.02-h2fb0a26_1 
+  re2                conda-forge/osx-64::re2-2024.07.02-ha5e900a_2

Looks like maybe this PR was the root cause:

• Rerender conda-forge/abseil-cpp-feedstock#86

And that that led to these other discussions:

• ABI break between clang 17 & 18 causing linkage errors with abseil conda-forge/abseil-cpp-feedstock#87
• MNT: rerender conda-forge/re2-feedstock#87