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[3.14] gh-139951: Test on GC collection disabled if threshold is zero (GH-140304) #140362

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Merged
JelleZijlstra merged 1 commit into from
Oct 21, 2025
Merged

[3.14] gh-139951: Test on GC collection disabled if threshold is zero (GH-140304) #140362

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gh-139951: Test on GC collection disabled if threshold is zero (GH-14… 
…0304)

(cherry picked from commit 5d0abb6)

Co-authored-by: Mikhail Efimov <[email protected]>
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@efimov-mikhail @miss-islington
efimov-mikhail authored and miss-islington committed Oct 20, 2025
commit 6942eb511e790c54b306ad101da9b2ba559289a6
14 changes: 14 additions & 0 deletions Lib/test/test_gc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1501,6 +1501,20 @@ def test_indirect_calls_with_gc_disabled(self):
finally:
gc.enable()

# Ensure that setting *threshold0* to zero disables collection.
@gc_threshold(0)
def test_threshold_zero(self):
junk = []
i = 0
detector = GC_Detector()
while not detector.gc_happened:
i += 1
if i > 50000:
break
junk.append([]) # this may eventually trigger gc (if it is enabled)

self.assertEqual(i, 50001)


class PythonFinalizationTests(unittest.TestCase):
def test_ast_fini(self):
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