[3.14] gh-154848: Enforce frame boundaries in the C unpickler (GH-154893) - #154981
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serhiy-storchaka merged 1 commit intoJul 31, 2026
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…ythonGH-154893) The C unpickler did not enforce PEP 3154 frame boundaries: an argument could straddle a frame, and a new frame could begin before the previous one ended. Such reads now raise UnpicklingError, as in the pure Python implementation. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> (cherry picked from commit 10a8454) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Manual backport of GH-154893 (had merge conflicts due to unrelated refactors on main); verified with a local build and the pickle test suites.