[3.13] gh-143003: Fix possible shared buffer overflow in bytearray.extend() (GH-143086)
#143448
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…ray.extend() (pythonGH-143086) When __length_hint__() returns 0 for non-empty iterator, the data can be written past the shared 0-terminated buffer, corrupting it. (cherry picked from commit 5225635) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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When
__length_hint__()returns 0 for non-empty iterator, the data can be written past the shared 0-terminated buffer, corrupting it. (cherry picked from commit 5225635)bytearray_extendvia misleading__length_hint__#143003