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Title: gh-101037: Fix potential memory underallocation for zeros of int subtypes by mdickinson · Pull Request #101038 · python/cpython · GitHub

Open Graph Title: gh-101037: Fix potential memory underallocation for zeros of int subtypes by mdickinson · Pull Request #101038 · python/cpython

X Title: gh-101037: Fix potential memory underallocation for zeros of int subtypes by mdickinson · Pull Request #101038 · python/cpython

Description: This PR fixes object allocation in long_subtype_new to ensure that there's at least one digit in all cases, and makes sure that the value of that digit is copied over from the source long. Needs backport to 3.11, but not any further: the change to require at least one digit was only introduced for Python 3.11. Fixes #101037. Issue: gh-101037

Open Graph Description: This PR fixes object allocation in long_subtype_new to ensure that there's at least one digit in all cases, and makes sure that the value of that digit is copied over from the source long. Need...

X Description: This PR fixes object allocation in long_subtype_new to ensure that there's at least one digit in all cases, and makes sure that the value of that digit is copied over from the source long. ...

Opengraph URL: https://github.com/python/cpython/pull/101038

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61adba0 gh-101037: Fix memory allocation for zeros of int subtypes mdickinson Jan 14, 2023 https://github.com/python/cpython/pull/101038/commits/61adba0d65f416e3bf285b5881ce8705d1647f7b
877067c Add note to longintrepr.h to clarify that ob_digit[0] is always safe … mdickinson Jan 14, 2023 https://github.com/python/cpython/pull/101038/commits/877067c181b2ee7714b83f4935f237f9df694e36
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