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gh-144356: Make set iterator __length_hint__ and iternext race-safe under no-gil #144357

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gh-144356: Make set iterator __length_hint__ and iternext race-safe under no-gil #144357

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47d75fe
Fix data race in setiter_len() under no-gil
hyongtao-code Jan 31, 2026
3e3785c
Add test case
hyongtao-code Jan 31, 2026
229ced3
📜🤖 Added by blurb_it.
blurb-it[bot] Jan 31, 2026
cdcf88a
Resovle comments
hyongtao-code Feb 1, 2026
21f1478
Update test case: used_race and exhaust_race
hyongtao-code Feb 1, 2026
a18c698
Add test case
hyongtao-code Feb 6, 2026
79b5fbc
Try to address the comments
hyongtao-code Feb 6, 2026
6ac15e0
Post fix
hyongtao-code Feb 6, 2026
3222eef
Address comments
hyongtao-code Feb 8, 2026
7fb39bc
Post fix
hyongtao-code Feb 8, 2026
78241a8
Update Lib/test/test_free_threading/test_set.py
hyongtao-code Feb 9, 2026
52285a2
Revert "Update Lib/test/test_free_threading/test_set.py"
hyongtao-code Feb 9, 2026
c9ece31
Address comments
hyongtao-code Feb 9, 2026
e41e852
Enhance the test case as test_itertools.py
hyongtao-code Feb 10, 2026
b32b5ec
Update NEWS
hyongtao-code Feb 10, 2026
d14856c
Address comment
hyongtao-code Feb 10, 2026
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Address comments
hyongtao-code Feb 10, 2026
1ce898a
Update test cases
hyongtao-code Feb 11, 2026
c110ddd
Address comments: unused code
hyongtao-code Feb 13, 2026
6120aef
Update Lib/test/test_free_threading/test_set.py
hyongtao-code Feb 13, 2026
afea804
Update Objects/setobject.c
hyongtao-code Feb 13, 2026
dc4eaa6
Remove empyt line
hyongtao-code Feb 14, 2026
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Address comments
hyongtao-code Mar 11, 2026
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Merge branch 'main' into fix-data-race
hyongtao-code May 19, 2026
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Update Lib/test/test_free_threading/test_set.py 
Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com>
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@hyongtao-code @eendebakpt
hyongtao-code and eendebakpt authored Feb 9, 2026
commit 78241a862bd12a42ab369790ad8bedbe2fc2fc41
9 changes: 3 additions & 6 deletions Lib/test/test_free_threading/test_set.py
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Original file line number Diff line number Diff line change
Expand Up @@ -214,7 +214,8 @@ def reader():

def test_iternext_concurrent_exhaust_race(self):
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NUM_LOOPS = 20_000
barrier = Barrier(3)
number_of_threads = 3
barrier = Barrier(number_of_threads)
box = {"it": None}

def advancer():
Expand All @@ -235,11 +236,7 @@ def producer():
barrier.wait()
barrier.wait()

threads = [
Thread(target=advancer),
Thread(target=advancer),
Thread(target=producer),
]
threads = [Thread(target=advancer) for _ in range(number_of_threads)]
for t in threads:
t.start()
for t in threads:
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