gh-146196: Fix potential Undefined Behavior in _PyUnicodeWriter_WriteASCIIString#146201
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vstinner merged 2 commits intopython:mainfrom Mar 20, 2026
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gh-146196: Fix potential Undefined Behavior in _PyUnicodeWriter_WriteASCIIString#146201vstinner merged 2 commits intopython:mainfrom
vstinner merged 2 commits intopython:mainfrom
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Misc/NEWS.d/next/Core_and_Builtins/2026-03-20-13-55-14.gh-issue-146196.Zg70Kb.rst
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Misc/NEWS.d/next/Core_and_Builtins/2026-03-20-13-55-14.gh-issue-146196.Zg70Kb.rst
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Sorry, @ashm-dev and @vstinner, I could not cleanly backport this to |
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…IString() (python#146201) Avoid calling memcpy(data + writer->pos, NULL, 0) which has an undefined behavior. Co-authored-by: Victor Stinner <vstinner@python.org> (cherry picked from commit cd10a2e)
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GH-146220 is a backport of this pull request to the 3.14 branch. |
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_PyUnicodeWriter_WriteASCIIString