chore: forward port 1.38.x#7239
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carllerche merged 6 commits intotokio-1.43.xfrom Apr 4, 2025
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The broadcast channel does not require values to implement `Sync` yet it calls the `.clone()` method without synchronizing. This is unsound logic. This patch adds per-value synchronization on receive to handle this case. It is unlikely any usage of the broadcast channel is currently at risk of the unsoundeness issue as it requires accessing a `!Sync` type during `.clone()`, which would be very unusual when using the broadcast channel.
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hds
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Forward ports #7232 to 1.43.x