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Matthias Krüger a1c98ca160
Rollup merge of #132832 - compiler-errors:late-ty, r=cjgillot 
Deny capturing late-bound ty/const params in nested opaques

First, this reverts a7f609504c. I can't exactly remember why I approved this specific bit of https://github.com/rust-lang/rust/pull/132466; specifically, I don't know that the purpose of that commit is, and afaict we will never have an opaque that captures late-bound params through a const because opaques can't be used inside of anon consts. Am I missing something `@cjgillot?` Since I can't see a case where this matters, and no tests seem to fail.

The second commit adds a `deny_late_regions: bool` to distinguish `Scope::LateBoundary` which should deny *any* late-bound params or just ty/consts. Then, when resolving opaques we wrap ourselves in a `Scope::LateBoundary { deny_late_regions: false }` so that we deny late-bound ty/const, which fixes a bunch of ICEs that all vaguely look like `impl for<T> Trait<Assoc = impl OtherTrait<T>>`.

I guess this could be achieved other ways; for example, with a different scope kind, or maybe we could just reuse `Scope::Opaque`. But this seems a bit more verbose. I'm open to feedback anyways.

Fixes #131535
Fixes #131637
Fixes #132530

I opted to remove those crashes tests ^ without adding them as regular tests, since they're basically triggering uninteresting late-bound ICEs far off in the trait solver, and the reason that existing tests such as `tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.rs` don't ICE are kinda just coincidental (i.e. due to a missing impl block). I don't really feel motivated to add random permutations to tests just to exercise non-lifetime binders.

r? cjgillot
2024-11-16 21:05:46 +01:00
.github Merge commit 'f712eb5cdccd121d0569af12f20e6a0fabe4364d' into clippy-subtree-update 2024-11-07 22:37:01 +01:00
compiler Rollup merge of #132832 - compiler-errors:late-ty, r=cjgillot 2024-11-16 21:05:46 +01:00
library Rollup merge of #132449 - RalfJung:is_val_statically_known, r=compiler-errors 2024-11-16 21:05:44 +01:00
LICENSES Rename LICENSES/GPL-2.0.txt into LICENSES/GPL-2.0-only.txt 2024-09-06 16:01:46 +02:00
src Rollup merge of #132787 - maxcabrajac:fnctxt, r=petrochenkov 2024-11-16 21:05:46 +01:00
tests Rollup merge of #132832 - compiler-errors:late-ty, r=cjgillot 2024-11-16 21:05:46 +01:00
.clang-format Add .clang-format 2024-06-26 05:56:00 +08:00
.editorconfig Only use max_line_length = 100 for *.rs 2023-07-10 15:18:36 -07:00
.git-blame-ignore-revs Add rustfmt 2024 reformatting to git blame ignore 2024-09-23 10:02:04 +02:00
.gitattributes Rename config.toml.example to config.example.toml 2023-03-11 14:10:00 -08:00
.gitignore Rollup merge of #129620 - WaffleLapkin:flake, r=Noratrieb 2024-10-17 20:47:29 +02:00
.gitmodules Update to LLVM 19.1.0 2024-09-20 14:41:36 -07:00
.ignore Add .ignore file to make config.toml searchable in vscode 2024-06-24 10:15:16 +02:00
.mailmap Add a bunch of mailmap entries 2024-11-01 20:10:36 +01:00
Cargo.lock Fix ICE when passing DefId-creating args to legacy_const_generics. 2024-11-16 01:07:51 +01:00
Cargo.toml move src/tools/build_helper into src/build_helper 2024-11-11 11:19:11 +03:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
config.example.toml update download-rustc comments and default 2024-11-14 14:56:48 +03:00
configure Ensure ./configure works when configure.py path contains spaces 2024-02-16 18:57:22 +00:00
CONTRIBUTING.md Merge commit 'f712eb5cdccd121d0569af12f20e6a0fabe4364d' into clippy-subtree-update 2024-11-07 22:37:01 +01:00
COPYRIGHT Update COPYRIGHT file 2022-10-30 10:23:14 -04:00
INSTALL.md add clarity for custom path installation 2024-10-06 07:37:00 -05:00
LICENSE-APACHE Remove appendix from LICENCE-APACHE 2019-12-30 14:25:53 +00:00
LICENSE-MIT LICENSE-MIT: Remove inaccurate (misattributed) copyright notice 2017-07-26 16:51:58 -07:00
README.md Merge commit 'f712eb5cdccd121d0569af12f20e6a0fabe4364d' into clippy-subtree-update 2024-11-07 22:37:01 +01:00
RELEASES.md relnotes: fix stabilizations of assume_init 2024-10-22 10:47:42 -07:00
REUSE.toml Fix licensing information in REUSE.toml 2024-09-06 16:01:47 +02:00
rust-bors.toml Increase timeout for new bors bot 2024-03-13 08:31:07 +01:00
rustfmt.toml chore(style): sync submodule exclusion list between tidy and rustfmt 2024-11-02 16:43:10 +03:00
triagebot.toml add myself into users_on_vacation on triagebot 2024-11-14 15:06:12 +03:00
x fix(x): fix a regex used to find python executable 2024-11-06 16:40:02 +03:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Fix recent python linting errors 2023-08-02 04:40:28 -04:00

README.md

This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

Why Rust?

  • Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrate with other languages.

  • Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.

  • Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).

Quick Start

Read "Installation" from The Book.

Installing from Source

If you really want to install from source (though this is not recommended), see INSTALL.md.

Getting Help

See https://www.rust-lang.org/community for a list of chat platforms and forums.

Contributing

See CONTRIBUTING.md.

License

Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.

Trademark

The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").

If you want to use these names or brands, please read the media guide.

Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.