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Title: gh-145105: Fix crash in csv.reader with re-entrant iterator by raminfp · Pull Request #145106 · python/cpython · GitHub

Open Graph Title: gh-145105: Fix crash in csv.reader with re-entrant iterator by raminfp · Pull Request #145106 · python/cpython

X Title: gh-145105: Fix crash in csv.reader with re-entrant iterator by raminfp · Pull Request #145106 · python/cpython

Description: The fix adds a guard right after PyIter_Next returns: if self->fields has been set to NULL by a re-entrant call, raise csv.Error instead of continuing into parse_process_char. Issue: gh-145105

Open Graph Description: The fix adds a guard right after PyIter_Next returns: if self->fields has been set to NULL by a re-entrant call, raise csv.Error instead of continuing into parse_process_char. Issue: gh-145105

X Description: The fix adds a guard right after PyIter_Next returns: if self->fields has been set to NULL by a re-entrant call, raise csv.Error instead of continuing into parse_process_char. Issue: gh-145105

Opengraph URL: https://github.com/python/cpython/pull/145106

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d4f4ec1 gh-145105: Fix crash in csv.reader with re-entrant iterator raminfp Feb 22, 2026 https://github.com/python/cpython/pull/145106/commits/d4f4ec1e468228995b7c06de6288e0f139bd68b6
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