[issue33803] contextvars: hamt_alloc() must initialize h_root and h_count fields

[Yury Selivanov]

Change by Yury Selivanov <yselivanov at gmail.com>:


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keywords: +patch
pull_requests: +7132
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33803>
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