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| Only use cf_feature_version if PyCF_ONLY_AST in cf_flags | https://github.com/python/cpython/pull/21022/commits/ec4f68816ef2243e6de9760b823b0955701fd3ec |
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| Also check PyCF_ONLY_AST for old parser | https://github.com/python/cpython/pull/21022/commits/4910cc0aee6cd2772bdbae05c725922e466e932e |
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