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hide `--explain` hint if error has no extended info
Fixes #59848.
r? @estebank
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libcore => 2018
Transitions `libcore` to Rust 2018; cc #58099
r? @Centril
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Rename files about error codes
fixes #60017
This PR will be failed in tidy.
<details>
<summary>The log is here:</summary>
```
tidy check
tidy error: duplicate error code: 411
tidy error: Documents\GitHub\rust\src\librustc_resolve\diagnostics.rs:83: __diagnostic_used!(E0411);
tidy error: Documents\GitHub\rust\src\librustc_resolve\diagnostics.rs:84: err.code(DiagnosticId::Error("E0411".to_owned()));
tidy error: duplicate error code: 424
tidy error: Documents\GitHub\rust\src\librustc_resolve\diagnostics.rs:90: debug!("smart_resolve_path_fragment: E0424, source={:?}", source);
tidy error: Documents\GitHub\rust\src\librustc_resolve\diagnostics.rs:92: __diagnostic_used!(E0424);
tidy error: Documents\GitHub\rust\src\librustc_resolve\diagnostics.rs:93: err.code(DiagnosticId::Error("E0424".to_owned()));
some tidy checks failed
```
</details>
I'd like to fix this but I don't know what to do.
I will work on later. Please let me know if you have any solutions.
r? @petrochenkov
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up some run-make tests.
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The documentation for `rchunks_exact` said it started at the beginning
of the slice, bit it actually starts at the end of the slice.
In addition, there were a couple of "of the slice of the slice"
duplicate phrases going on for `rchunks_exact` and `rchunks_exact_mut`.
This fixes #60068.
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make things clearer.
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Stack size of 10 **bytes** does not make any sense: the minimal possible stack size is greater anyway.
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update miri
Fixes https://github.com/rust-lang/rust/issues/60040
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Make const parameters enforce no variance constraints
Fixes https://github.com/rust-lang/rust/issues/60047. Also includes some minor const refactoring for convenience.
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Fix ICE on const evaluation of const method
Fix #54954.
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Do not mention missing `PartialOrd` impl when involving uncalled fns
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Resolve inconsistency in error messages between "parameter" and "variable".
The inconsistency was introduced in 104fe1c4db24f860b890dfd25577f23ee111279a (#33619), when a label saying `type variable` was added to an error with a message talking about `type parameters`.
Given that `parameter` is far more prevalent when referring to generics in the context of Rust, IMO it should be that in both the message and the label.
r? @nikomatsakis or @estebank
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Remove nrc from toolstate pings
🙉
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Remove collection-specific `with_capacity` documentation from `std::collections`
Fixes #59931
The style of `std::collections` module doc is very much a beginner friendly guide, and documenting niche, collection-specific behaviour feels out of place, if not brittle.
The note about `VecDeque` is outdated (see issue), and while `Vec` probably won't change its guarantees any time soon, the users who are interested in its allocation properties will find that in its own documentation.
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Re-export core::str::{EscapeDebug, EscapeDefault, EscapeUnicode} in std
cc #59893
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Add test checking that Index<T: ?Sized> works
I've noticed that we have an `Idx: ?Sized` bound on the **index** in the `Index`, which seems strange given that we accept index by value. My guess is that it was meant to be removed in https://github.com/rust-lang/rust/pull/23601, but was overlooked.
If I remove this bound, `./x.py src/libstd/ src/libcore/` passes, which means at least that this is not covered by test.
I think there's three things we can do here:
* run crater with the bound removed to check if there are any regressions, and merge this, to be consistent with other operator traits
* run crater, get regressions, write a test for this with a note that "hey, we tried to fix it, its unfixable"
* decide, in the light of by-value DSTs, that this is a feature rather than a bug, and add a test
cc @rust-lang/libs
EDIT: the forth alternative is that there exist a genuine reason why this is the case, but I failed to see it :D
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