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[3.15] gh-160427: Return None from TextIOWrapper.buffer when detached (GH-160802) - #161449
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…ythonGH-160802) pythongh-154523 turned the buffer member descriptor into a getter that raises ValueError when the buffer is NULL, and the backport shipped in 3.14.9 and 3.15.1. That made hasattr(stream, "buffer") raise after detach(). Restore the old member descriptor result (None) while keeping the critical section. (cherry picked from commit 3422197) Co-authored-by: Cody Maloney <cmaloney@users.noreply.github.com>
This was referenced Nov 5, 2026
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gh-154523 turned the buffer member descriptor into a getter that raises
ValueError when the buffer is NULL, and the backport shipped in 3.14.9
and 3.15.1. That made hasattr(stream, "buffer") raise after detach().
Restore the old member descriptor result (None) while keeping the
critical section.
(cherry picked from commit 3422197)
Co-authored-by: Cody Maloney cmaloney@users.noreply.github.com
hasattr(stream, "buffer")fails with ValueError if buffer is detached #160427