[3.13] gh-141311: Avoid assertion in BytesIO.readinto() (GH-141333) #141478
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…GH-141333) 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 7d54374) Co-authored-by: Cody Maloney <[email protected]>
serhiy-storchaka
approved these changes
Nov 12, 2025
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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 7d54374)
_io_BytesIO_readinto_impl: Assertion 'self->pos + len < PY_SSIZE_T_MAX' failed.#141311