fix: guard aclose() against missing attributes during GC#2243

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sunhwan wants to merge 2 commits intogoogleapis:mainfrom

sunhwan:fix/aclose-attribute-error-on-gc

Commits on Apr 7, 2026

fix: guard aclose() against missing attributes during GC
sunhwan
committed

Commits on Apr 8, 2026

fix: add type ignore comment for mypy union-attr error
sunhwan
committed