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Rollup merge of #54913 - RalfJung:unwind-safe, r=alexcrichton

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doc fix: it's auto traits that make for automatic implementations

Being a marker trait is not good enough (that just means "no items in the trait").

r? @alexcrichton who [originally wrote these docs](0a13f1abaf).
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kennytm 2018-10-12 22:04:08 +08:00 • committed by GitHub
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src/libstd/panic.rs
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@ -79,7 +79,7 @@ pub use core::panic::{PanicInfo, Location};
///
/// Simply put, a type `T` implements `UnwindSafe` if it cannot easily allow
/// witnessing a broken invariant through the use of `catch_unwind` (catching a
/// panic). This trait is a marker trait, so it is automatically implemented for
/// panic). This trait is an auto trait, so it is automatically implemented for
/// many types, and it is also structurally composed (e.g. a struct is unwind
/// safe if all of its components are unwind safe).
///