gh-148268: Avoid debug assertion in specialized list compares#148309
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officialasishkumar wants to merge 2 commits into
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gh-148268: Avoid debug assertion in specialized list compares#148309officialasishkumar wants to merge 2 commits into
officialasishkumar wants to merge 2 commits into
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Handle recursion errors raised by the debug-only cross-check in the specialized latin, compact-int, and float comparison helpers used by list sorting. When the verification path hits the C stack overflow guard, clear that exception so the optimized comparison remains side-effect free.\n\nThe change preserves the consistency assertion when the fallback comparison succeeds and adds a NEWS entry for the fix.
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All commit authors signed the Contributor License Agreement. |
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@officialasishkumar you'll need to sign the CLA, see #148309 (comment). |
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Done |
StanFromIreland
approved these changes
Apr 10, 2026
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Signed the cla |
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This PR is stale because it has been open for 30 days with no activity. |
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Handle recursion errors raised by the debug-only cross-check in the specialized latin, compact-int, and float comparison helpers used by list sorting. When that verification path hits the C stack overflow guard, clear the resulting exception so the optimized comparison remains side-effect free.
I did not add a targeted regression test because the failure is in a debug-only verification path that is only triggered when the extra
PyObject_RichCompareBool()call hits the C stack guard; I could not produce a stable Python-level reproducer for that condition.Tests:
./python -m test -j1 test_sort test_richcmpunsafe_{latin,long,float}_comparehave anassertthat assumesPyObject_RichCompareBoolcan't fail #148268