Segmentation faults during partial_fit for check_fit_score_takes_y unit-test in scikit-learn #57
Description
Describe the bug
During the unit-test of RandomForestClassifier and ExtraTreesClassifier, it seems that there is some segmentation fault arising from partial_fit tree builder build function.
I suspect, this has something to do with either:
i) pickling and then accessing something that isn't restored properly
ii) accessing memory that isn't allocated
It would be great if it could be reproduced, but I fail to do so locally. This suggests to me it could be an edge case, but then that's even more important to fix.
Steps/Code to Reproduce
TBD.
Expected Results
There should be no segmentation fault.
Actual Results
.....................................................Fatal Python error: Segmentation fault
Thread 0x00007000107d4000 (most recent call first):
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/threading.py", line 320 in wait
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/site-packages/joblib/externals/loky/backend/queues.py", line 113 in _feed
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/threading.py", line 975 in run
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/threading.py", line 1038 in _bootstrap_inner
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/threading.py", line 995 in _bootstrap
Thread 0x000070000f7d1000 (most recent call first):
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/selectors.py", line 415 in select
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/multiprocessing/connection.py", line 930 in wait
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/site-packages/joblib/externals/loky/process_executor.py", line 611 in wait_result_broken_or_wakeup
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/site-packages/joblib/externals/loky/process_executor.py", line 557 in run
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/threading.py", line 1038 in _bootstrap_inner
File "/usr/local/miniconda/envs/testvenv/lib/python3.11/threading.py", line 995 in _bootstrap
Versions
sklearn submodulev3 branch