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Title: gh-145968: fix base64.b64decode altchars translation in specific cases by mayeut · Pull Request #145969 · python/cpython · GitHub

Open Graph Title: gh-145968: fix base64.b64decode altchars translation in specific cases by mayeut · Pull Request #145969 · python/cpython

X Title: gh-145968: fix base64.b64decode altchars translation in specific cases by mayeut · Pull Request #145969 · python/cpython

Description: When altchars overlaps with the standard ones, the translation does not always yield to the expected outcome. This updates bytes.maketrans arguments to take those overlap cases into account. Issue: gh-145968

Open Graph Description: When altchars overlaps with the standard ones, the translation does not always yield to the expected outcome. This updates bytes.maketrans arguments to take those overlap cases into account. Issu...

X Description: When altchars overlaps with the standard ones, the translation does not always yield to the expected outcome. This updates bytes.maketrans arguments to take those overlap cases into account. Issu...

Opengraph URL: https://github.com/python/cpython/pull/145969

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d484023 gh-145968: fix base64.b64decode altchars translation in specific cases mayeut Mar 15, 2026 https://github.com/python/cpython/pull/145969/commits/d4840235000be2b1f8dee693afd88b375352726f
081d550 simplification from review mayeut Mar 15, 2026 https://github.com/python/cpython/pull/145969/commits/081d550cf762992fd085c37add84b9b7dd31078d
e956fe6 don't use the results of an unordered 2 element set mayeut Mar 15, 2026 https://github.com/python/cpython/pull/145969/commits/e956fe6e9d5ca148378a2aefa73088fe1465fd91
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