Add a few trait impls for AccessError

[ghost]

No description provided.

[rust-highfive]

r? @steveklabnik

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[rust-highfive]

⚠️ Warning ⚠️

• These commits modify submodules.

[ghost]

There were some accidental submodule updates, but now they seem to be removed. Sorry for the noise!

[bors]

☔ The latest upstream changes (presumably #60341) made this pull request unmergeable. Please resolve the merge conflicts.

[Mark-Simulacrum]

We'll probably want a #[stable... attribute on this even though it does nothing today :)

[Mark-Simulacrum]

r? @dtolnay

[dtolnay]

@rust-lang/libs -- this PR adds impls of Clone, Copy, Eq, PartialEq, and Error for std::thread::AccessError, which is the error returned by the try_with method on thread locals. See Utf8Error, CharTryFromError, TryFromIntError, fmt::Error, RecvTimeoutError, RecvError, TryRecvError as examples of existing error types having all of these impls.

  impl<T: 'static> LocalKey<T> {
      pub fn try_with<F, R>(&'static self, f: F) -> Result<R, AccessError>
      where
          F: FnOnce(&T) -> R;
  }

  pub struct AccessError { _private: () }

+ impl Clone for AccessError {...}
+ impl Copy for AccessError {...}
+ impl Eq for AccessError {...}
+ impl PartialEq for AccessError {...}
+ impl std::error::Error for AccessError {...}

@rfcbot fcp merge

[rfcbot]

Team member @dtolnay has proposed to merge this. The next step is review by the rest of the tagged team members:

• @Amanieu
• @Kimundi
• @SimonSapin
• @alexcrichton
• @dtolnay
• @sfackler
• @withoutboats

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

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[rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔

[rfcbot]

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

The RFC will be merged soon.

[alexcrichton]

@bors: r=dtolnay

[bors]

📌 Commit d2c9c12 has been approved by dtolnay

[bors]

⌛ Testing commit d2c9c12 with merge f6ecdc2...

[bors]

☀️ Test successful - checks-azure
Approved by: dtolnay
Pushing f6ecdc2 to master...