Don't derive `PartialEq::ne`.
Currently we skip deriving `PartialEq::ne` for C-like (fieldless) enums
and empty structs, thus reyling on the default `ne`. This behaviour is
unnecessarily conservative, because the `PartialEq` docs say this:
> Implementations must ensure that eq and ne are consistent with each other:
>
> `a != b` if and only if `!(a == b)` (ensured by the default
> implementation).
This means that the default implementation (`!(a == b)`) is always good
enough. So this commit changes things such that `ne` is never derived.
The motivation for this change is that not deriving `ne` reduces compile
times and binary sizes.
Observable behaviour may change if a user has defined a type `A` with an
inconsistent `PartialEq` and then defines a type `B` that contains an
`A` and also derives `PartialEq`. Such code is already buggy and
preserving bug-for-bug compatibility isn't necessary.
Two side-effects of the change:
- There is only one error message produced for types where `PartialEq`
cannot be derived, instead of two.
- For coverage reports, some warnings about generated `ne` methods not
being executed have disappeared.
Both side-effects seem fine, and possibly preferable.
Rollup of 9 pull requests
Successful merges:
- #97962 (Make must_not_suspend lint see through references when drop tracking is enabled)
- #99966 (avoid assertion failures in try_to_scalar_int)
- #100637 (Improving Fuchsia rustc support documentation)
- #100643 (Point at a type parameter shadowing another type)
- #100651 (Migrations for rustc_expand transcribe.rs)
- #100669 (Attribute cleanups)
- #100670 (Fix documentation of rustc_parse::parser::Parser::parse_stmt_without_recovery)
- #100674 (Migrate lint reports in typeck::check_unused to LintDiagnostic)
- #100688 (`ty::Error` does not match other types for region constraints)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Attempt to load all the required sync functions and fail if any one of them fails.
This reintroduces a macro for optional loading of functions but keeps it separate from the fallback macro rather than having that do two different jobs.
Migrate lint reports in typeck::check_unused to LintDiagnostic
In this PR, I migrate two lint reports in `typeck::check_unused` by `LintDiagnostic`, all of which is about extern crates.
```@rustbot``` label +A-translation
r? rust-lang/diagnostics
Fix documentation of rustc_parse::parser::Parser::parse_stmt_without_recovery
Something seems to have gotten out of sync during the creation of #81177, where both the argument and comment were introduced.
Migrations for rustc_expand transcribe.rs
This PR includes some migrations to the new diagnostics API for the `rustc_expand` module.
r? ```@davidtwco```
Improving Fuchsia rustc support documentation
* Adjusting `package/meta/package` to fit current schema
* Adding repository server step
* Adjusting step to give default repository
* Adding "recreate" step for easier step following
avoid assertion failures in try_to_scalar_int
Given that this is called `try_to_scalar_int`, we probably shouldn't `assert_int` here. Similarly `try_to_bits` also doesn't `assert!` that the size is correct.
Also add some `track_caller` for debugging, while we are at it.
r? ```@oli-obk```
Make must_not_suspend lint see through references when drop tracking is enabled
See #97333.
With drop tracking enabled, sometimes values that were previously linted are now considered dropped and not linted. This change makes must_not_suspend traverse through references to still catch these values.
Unfortunately, this leads to duplicate warnings in some cases (e.g. [dedup.rs](9a74608543/src/test/ui/lint/must_not_suspend/dedup.rs (L4))), so we only use the new behavior when drop tracking is enabled.
cc ``@guswynn``
Update cargo
3 commits in efd4ca3dc0b89929dc8c5f5c023d25978d76cb61..9809f8ff33c2b998919fd0432c626f0f7323697a
2022-08-12 01:28:28 +0000 to 2022-08-16 22:10:06 +0000
- Improve error message for an array value in the manifest (rust-lang/cargo#10944)
- Fix file locking being not supported on Android raising an error (rust-lang/cargo#10975)
- Bump to 0.66.0, update changelog (rust-lang/cargo#10983)
Update books
## nomicon
2 commits in 8d1e4dccf71114ff56f328f671f2026d8e6b62a2..8e6aa3448515a0654e347b5e2510f1d4bc4d5a64
2022-07-18 18:12:35 -0400 to 2022-08-15 15:36:13 -0700
- Update the `repr(transparent)` section to reflect the current state (rust-lang/nomicon#376)
- [typo] typo on limits of lifetime chapter (rust-lang/nomicon#377)
## reference
5 commits in f3d3953bf3b158d596c96d55ce5366f9f3f972e9..e647eb102890e8927f488bea12672b079eff8d9d
2022-08-01 17:17:37 -0700 to 2022-08-16 11:35:27 -0700
- #[non_exhaustive] on variant blocks cross-crate as casts (rust-lang/reference#1249)
- Revert let chains reference docs (rust-lang/reference#1251)
- Update subtyping.md (rust-lang/reference#1240)
- a fix about .await (rust-lang/reference#1245)
- Be less specific about the representation of `+bundle` (rust-lang/reference#1246)
## book
2 commits in 36383b4da21dbd0a0781473bc8ad7ef0ed1b6751..42ca0ef484fcc8437a0682cee23abe4b7c407d52
2022-07-19 21:03:20 -0400 to 2022-08-12 21:52:02 -0400
- Missing period at end of sentence
- Fix grammar in ch06-02
## rust-by-example
8 commits in ee342dc91e1ba1bb1e1f1318f84bbe3bfac04798..03301f8ae55fa6f20f7ea152a517598e6db2cdb7
2022-07-27 11:06:36 -0300 to 2022-08-14 08:51:44 -0300
- Update print.md (rust-lang/rust-by-example#1597)
- in Meta, replace 'playpen' with 'playground' (rust-lang/rust-by-example#1596)
- Update doc comment to link to name field without compilation warning (rust-lang/rust-by-example#1595)
- add line numbers for playpen fixesrust-lang/rust-by-example#1593 (rust-lang/rust-by-example#1594)
- clarify that the map-reduce example relies on static data (rust-lang/rust-by-example#1592)
- Update flow_control.md (rust-lang/rust-by-example#1591)
- Remove duplicate line in the hello/print.md file (rust-lang/rust-by-example#1590)
- Make rust editable in chapter on defaults (rust-lang/rust-by-example#1589)
## rustc-dev-guide
15 commits in 04f3cf0bb2f5a6ee2bfc4b1a6a6cd8c11d1c5531..d3daa1f28e169087becbc5e2b49ac91ca0405a44
2022-07-31 07:46:57 +0200 to 2022-08-13 10:00:38 +0900
- Improve the "Diagnostic items" chapter (rust-lang/rustc-dev-guide#1427)
- date-check: crates-io
- fix/improve compiler-debugging
- Update src/compiler-debugging.md
- add gdb tips for symbol-mangling-version
- move references down to avoid clutter (rust-lang/rustc-dev-guide#1420)
- update date-check format on github issue (rust-lang/rustc-dev-guide#1416)
- Fix legend colors in dark mode
- Add color for downloaded nodes
- Add colors to diagram
- Add bootstrapping diagram
- date-check: rustc_codegen_ssa is still alive
- note is now too old to be relevant
- date-check: be more strict
- make date-check more lightweight (rust-lang/rustc-dev-guide#1394)
## edition-guide
3 commits in c55611dd6c58bdeb52423b5c52fd0f3c93615ba8..6038be9d37d7251c966b486154af621d1794d7af
2022-02-21 14:21:39 +0100 to 2022-08-15 08:12:42 -0700
- use title "The Rust Edition Guide" everywhere (rust-lang/edition-guide#280)
- "Creating a new project": add example using 'cargo new --edition YEAR' (rust-lang/edition-guide#279)
- fixesrust-lang/edition-guide#277: mention rust 1.0 release month and year (rust-lang/edition-guide#278)
Remove deferred sized checks (make them eager)
Improves diagnostics spans... this doesn't seem to be the case anymore:
```rust
// Some additional `Sized` obligations badly affect type inference.
// These obligations are added in a later stage of typeck.
pub(super) deferred_sized_obligations:
RefCell<Vec<(Ty<'tcx>, Span, traits::ObligationCauseCode<'tcx>)>>,
```
Migrate emoji identifier diagnostics to `SessionDiagnostic` in rustc_interface
* Migrate emoji identifier diagnostics to `interface_ferris_identifier` and `interface_emoji_identifier`.
This is my first PR! I'm learning how to migrate these diagnostics. Thanks in advance.
r? rust-lang/diagnostics
Pass +atomics-32 feature for {arm,thumb}v4t-none-eabi
Similar to 89582e8193, but for ARMv4t.
Pre-v6 ARM target does not have atomic CAS, except for Linux and Android where atomic CAS is provided by compiler-builtins. So, there is a similar issue as thumbv6m.
I have confirmed that enabling the `atomics-32` target feature fixes the problem in the project affected by this issue. (https://github.com/taiki-e/portable-atomic/pull/28#discussion_r946604136)
Closes#100619
r? ``@nikic``
cc ``@Lokathor``
unwind: don't build dependency when building for Miri
This is basically re-submitting https://github.com/rust-lang/rust/pull/94813.
In that PR there was a suggestion to instead have bootstrap set a `RUST_CHECK` env var and use that rather than doing something Miri-specific. However, such an env var would mean that when switching between `./x.py check` and `./x.py build`, the build script gets re-run each time, which doesn't seem good. So I think for now checking for Miri probably causes fewer problems.
r? ````@Mark-Simulacrum````
Do not report cycle error when inferring return type for suggestion
The UI test is a good example of a case where this happens. The cycle is due to needing the value of the return type `-> _` to compute the variances of items in the crate, but then needing the variances of the items in the crate to do typechecking to infer what `-> _`'s real type is.
Since we're already gonna emit an error in astconv, just delay the cycle bug as an error.
triagebot: add translation-related mention groups
- Move some code around so that triagebot can ping relevant parties when translation logic is modified.
- Add mention groups to triagebot for translation-related files/folders.
- Auto-label pull requests with changes to translation-related files/folders with `A-translation`.
r? `@Mark-Simulacrum`
