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[3.13] gh-157335: Fix out-of-bounds write in mmap.mmap.__setitem__ (#157438) - #158028
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…thon#157438) Fix out-of-bounds write in mmap.mmap.__setitem__() that could occur when converting the index or the assigned value (via __index__() for a single item, or via the buffer protocol for a slice) resized or closed the mmap object during the assignment. Co-authored-by: Victor Stinner <vstinner@python.org> (cherry picked from commit 09bf4c5)
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Fix out-of-bounds write in mmap.mmap.setitem() that could occur when converting the index or the assigned value (via index() for a single item, or via the buffer protocol for a slice) resized or closed the mmap object during the assignment.
(cherry picked from commit 09bf4c5)