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doc: clarify thread::scoped::JoinGuard chapter #313

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Oct 6, 2021
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doc: clarify thread::scoped::JoinGuard chapter #313

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6 changes: 6 additions & 0 deletions src/leaking.md
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Expand Up @@ -176,6 +176,12 @@ horribly degenerate. Also *oh my gosh* it's such a ridiculous corner case.

## thread::scoped::JoinGuard

> Note: This API has already been removed from std, for more information
> you may refer [issue #24292](https://github.com/rust-lang/rust/issues/24292).
>
> We still remain this chapter here because we think this example is still
> important, regardless of if it is still in std.

The thread::scoped API intended to allow threads to be spawned that reference
data on their parent's stack without any synchronization over that data by
ensuring the parent joins the thread before any of the shared data goes out
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