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[3.15] gh-161060: Fix pyexpat crash when the default handler is cleared (GH-161061) - #161842
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pythonGH-161061) Expat calls the default handler once per 1024-byte piece of a token that needs encoding conversion. Install a no-op instead of NULL when the handler is cleared after an error or unset from within a callback, as is already done for the character data handler. ANT-2026-0SJB3WWC (cherry picked from commit eb21dea301df801352ac6b4b21117fe6ef5cae4e) Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
This was referenced Nov 12, 2026
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Expat calls the default handler once per 1024-byte piece of a token that
needs encoding conversion. Install a no-op instead of NULL when the
handler is cleared after an error or unset from within a callback, as is
already done for the character data handler.
ANT-2026-0SJB3WWC
(cherry picked from commit eb21dea)
Co-authored-by: Gregory P. Smith 68491+gpshead@users.noreply.github.com
xml.parsers.expatcrashes whenDefaultHandlerraises on a long non-UTF-8 token #161060