gh-144872: fix heap buffer overflow `_PyTokenizer_ensure_utf8`#144807

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python:mainfrom

AdamKorcz:oss-fuzz-fix-1

Feb 26, 2026

Commits on Feb 13, 2026

oss-fuzz-451112368: fix found crash
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Commits on Feb 14, 2026

Add a regression test for oss-fuzz-451112368
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add NEWS entry
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Update Misc/NEWS.d/next/Library/2026-02-16-12-28-43.gh-issue-144872.k9_Q30.rst
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Update Parser/tokenizer/helpers.c
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gh-144872: move NEWS entry to Core_and_Builtins
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