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Rollup merge of #102232 - Urgau:stabilize-bench_black_box, r=TaKO8Ki

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Stabilize bench_black_box

This PR stabilize `feature(bench_black_box)`.

```rust
pub fn black_box<T>(dummy: T) -> T;
```

The FCP was completed in https://github.com/rust-lang/rust/issues/64102.

`@rustbot` label +T-libs-api -T-libs
This commit is contained in:
Yuki Okushi 2022-09-28 13:07:17 +09:00 • committed by GitHub
commit 07bb2e6527
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23 changed files with 8 additions and 28 deletions
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compiler/rustc_index/src/lib.rs
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@ -1,7 +1,6 @@
#![deny(rustc::untranslatable_diagnostic)]
#![deny(rustc::diagnostic_outside_of_impl)]
#![feature(allow_internal_unstable)]
#![feature(bench_black_box)]
#![feature(extend_one)]
#![feature(min_specialization)]
#![feature(new_uninit)]