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author	Cody Maloney <cmaloney@users.noreply.github.com>
	Wed, 12 Nov 2025 21:37:06 +0000 (13:37 -0800)
committer	GitHub <noreply@github.com>
	Wed, 12 Nov 2025 21:37:06 +0000 (23:37 +0200)
commit	7c62bd571bfc40237bc8120bdba80c92e35944d5
tree	a5efd7108f8b5483c3cf77b477882e1ebfb377fb	tree \| snapshot
parent	fffd38b2dd9706f4a1e3ee842441abffdf9a57b9	commit \| diff

[3.13] gh-141311: Avoid assertion in BytesIO.readinto() (GH-141333) (GH-141478)

Fix error in assertion which causes failure if pos is equal to PY_SSIZE_T_MAX.
Fix undefined behavior in read() and readinto() if pos is larger that the size
of the underlying buffer.
(cherry picked from commit 7d54374f9c7d91e0ef90c4ad84baf10073cf1d8a)

Lib/test/test_memoryio.py		diff \| blob \| blame \| history
Misc/NEWS.d/next/Library/2025-11-09-18-55-13.gh-issue-141311.qZ3swc.rst	[new file with mode: 0644]	blob
Modules/_io/bytesio.c		diff \| blob \| blame \| history

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