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gh-146076: Fix crash when a `ZoneInfo` subclass is missing a `_weak_cache` #244620

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gh-146076: Fix crash when a `ZoneInfo` subclass is missing a `_weak_cache`

gh-146076: Fix crash when a `ZoneInfo` subclass is missing a `_weak_cache` #244620

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succeeded Mar 18, 2026 in 4s

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