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Rollup merge of #23296 - shepmaster:explain-why-joinguard-is-must-use, r=alexcrichton

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Manish Goregaokar 2015-03-12 09:15:06 +05:30
commit 7f7a3cc29d
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src/libstd/thread.rs
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@ -635,7 +635,7 @@ impl Drop for JoinHandle {
/// Due to platform restrictions, it is not possible to `Clone` this
/// handle: the ability to join a child thread is a uniquely-owned
/// permission.
#[must_use]
#[must_use = "thread will be immediately joined if `JoinGuard` is not used"]
#[stable(feature = "rust1", since = "1.0.0")]
pub struct JoinGuard<'a, T: 'a> {
inner: JoinInner<T>,