Matthias Krüger ee804594c8 Rollup merge of #89693 - jkugelman:must-use-stdin-stdout-stderr-locks, r=joshtriplett ...

Add #[must_use] to stdin/stdout/stderr locks

Affected methods:

```rust
std::io           fn stdin_locked() -> StdinLock<'static>;
std::io::Stdin    fn lock(&self) -> StdinLock<'_>;
std::io           fn stdout_locked() -> StdoutLock<'static>;
std::io::Stdout   fn lock(&self) -> StdoutLock<'_>;
std::io           fn stderr_locked() -> StderrLock<'static>;
std::io::Stderr   fn lock(&self) -> StderrLock<'_>;
```

Parent issue: https://github.com/rust-lang/rust/issues/89692

2021-10-09 11:56:07 +02:00

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alloc

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backtrace @ cc89bb66f9

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core

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panic_abort

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panic_unwind

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proc_macro

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profiler_builtins

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rtstartup

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rustc-std-workspace-alloc

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rustc-std-workspace-core

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rustc-std-workspace-std

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std

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stdarch @ 5fdbc476af

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test

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unwind

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