Rollup of 6 pull requests
Successful merges:
- #114998 (feat(docs): add cargo-pgo to PGO documentation 📝)
- #116868 (Tweak suggestion span for outer attr and point at item following invalid inner attr)
- #117240 (Fix documentation typo in std::iter::Iterator::collect_into)
- #117241 (Stash and cancel cycle errors for auto trait leakage in opaques)
- #117262 (Create a new ConstantKind variant (ZeroSized) for StableMIR)
- #117266 (replace transmute by raw pointer cast)
r? `@ghost`
`@rustbot` modify labels: rollup
Centralize command running in boostrap (part one)
This PR tries to consolidate the various `run, try_run, run_quiet, run_quiet_delaying_failure, run_delaying_failure` etc. methods on `Builder`. This PR only touches command execution which doesn't produce output that would be later read by bootstrap, and it also only refactors spawning of commands that happens after a builder is created (commands executed during download & git submodule checkout are left as-is, for now).
The `run_cmd` method is quite meaty, but I expect that it will be changing rapidly soon, so I considered it easy to kept everything in a single method, and only after things settle down a bit, then maybe again split it up a bit.
I still kept the original shortcut methods like `run_quiet_delaying_failure`, but they now only delegate to `run_cmd`. I tried to keep the original behavior (or as close to it as possible) for all the various commands, but it is a giant mess, so there may be some deviations. Notably, `cmd.output()` is now always called, instead of just `status()`, which was called previously in some situations.
Apart from the refactored methods, there is also `Config::try_run`, `check_run`, methods that run commands that produce output, oh my… that's left for follow-up PRs :)
The driving goal of this (and following) refactors is to centralize command execution in bootstrap on a single place, to make command mocking feasible.
r? `@onur-ozkan`
Prepare the `bootstrap` tool for the new check-cfg syntax
This PR prepare the `bootstrap` tool for the [new check-cfg syntax](https://github.com/rust-lang/rust/pull/111072) as well as the according [changes to Cargo](https://github.com/rust-lang/cargo/pull/12845).
~~Note that while the new syntax can technically available on stage > 2, we actually cannot use it since we need a cargo version that supports the new syntax which won't happen until the next beta bump (if I understand everything correctly).~~
r? bootstrap
Store #[stable] attribute's `since` value in structured form
Followup to https://github.com/rust-lang/rust/pull/116773#pullrequestreview-1680913901.
Prior to this PR, if you wrote an improper `since` version in a `stable` attribute, such as `#[stable(feature = "foo", since = "wat.0")]`, rustc would emit a diagnostic saying **_'since' must be a Rust version number, such as "1.31.0"_** and then throw out the whole `stable` attribute as if it weren't there. This strategy had 2 problems, both fixed in this PR:
1. If there was also a `#[deprecated]` attribute on the same item, rustc would want to enforce that the stabilization version is older than the deprecation version. This involved reparsing the `stable` attribute's `since` version, with a diagnostic **_invalid stability version found_** if it failed to parse. Of course this diagnostic was unreachable because an invalid `since` version would have already caused the `stable` attribute to be thrown out. This PR deletes that unreachable diagnostic.
2. By throwing out the `stable` attribute when `since` is invalid, you'd end up with a second diagnostic saying **_function has missing stability attribute_** even though your function is not missing a stability attribute. This PR preserves the `stable` attribute even when `since` cannot be parsed, avoiding the misleading second diagnostic.
Followups I plan to try next:
- Do the same for the `since` value of `#[deprecated]`.
- See whether it makes sense to also preserve `stable` and/or `unstable` attributes when they contain an invalid `feature`. What redundant/misleading diagnostics can this eliminate? What problems arise from not having a usable feature name for some API, in the situation that we're already failing compilation, so not concerned about anything that happens in downstream code?
Stop telling people to submit bugs for internal feature ICEs
This keeps track of usage of internal features, and changes the message to instead tell them that using internal features is not supported.
I thought about several ways to do this but now used the explicit threading of an `Arc<AtomicBool>` through `Session`. This is not exactly incremental-safe, but this is fine, as this is set during macro expansion, which is pre-incremental, and also only affects the output of ICEs, at which point incremental correctness doesn't matter much anyways.
See [MCP 620.](https://github.com/rust-lang/compiler-team/issues/596)
Remap Cargo dependencies to /rust/deps
⚠️ **This doesn't affect user-compiled programs, it only affects building the Rust compiler itself.** ⚠️
Right now, `rust.remap-debuginfo = true` doesn't completely remap all paths: while LLVM and rustc sources are properly remapped (respectively to `/rust/llvm` and `/rust/$commit`), Cargo dependencies still use absolute paths from the Cargo home.
This never affected builds from CI much, because `CARGO_HOME=/cargo` in CI, so users see paths like this included in the precompiled binaries and libraries:
```
/cargo/registry/src/index.crates.io-6f17d22bba15001f/gimli-0.26.2/src/read/line.rs
```
Builds outside CI don't have remapping though, and it's confusing that the config flag doesn't fully do what it advertises.
This PR fixes it by adding remapping for dependencies too. *All registries's* source directory are remapped to `/rust/deps`, to account for multiple registries being able to contain crates.io crates (sparse index vs git, and source replacement mirrors). This results in paths like this being included:
```
/rust/deps/gimli-0.26.2/src/read/line.rs
```
Rename AsyncCoroutineKind to CoroutineSource
pulled out of https://github.com/rust-lang/rust/pull/116447
Also refactors the printing infra of `CoroutineSource` to be ready for easily extending it with a `Gen` variant for `gen` blocks
This keeps track of usage of internal features, and changes the message
to instead tell them that using internal features is not supported.
See MCP 620.
Rollup of 7 pull requests
Successful merges:
- #117111 (Remove support for alias `-Z instrument-coverage`)
- #117141 (Require target features to match exactly during inlining)
- #117152 (Fix unwrap suggestion for async fn)
- #117154 (implement C ABI lowering for CSKY)
- #117159 (Work around the fact that `check_mod_type_wf` may spuriously return `ErrorGuaranteed`)
- #117163 (compiletest: Display compilation errors in mir-opt tests)
- #117173 (Make `Iterator` a lang item)
r? `@ghost`
`@rustbot` modify labels: rollup
compiletest: Display compilation errors in mir-opt tests
Previously when compilation failed the `check_mir_dump` would panic first, so we would never display the compiler output.
Work around the fact that `check_mod_type_wf` may spuriously return `ErrorGuaranteed`
Even if that error is only emitted by `check_mod_item_types`.
fixes https://github.com/rust-lang/rust/issues/117153
A cleaner refactoring would merge/chain these queries in ways that ensure we only actually get an `ErrorGuaranteed` if there was an error emitted.
Fix some coroutine sentences that don't make sense anymore.
These happened during the `generator` -> `coroutine` rename.
Found thanks to `@pthariensflame` for their thorough review of the `generator` -> `coroutine` rename https://github.com/rust-lang/rust/pull/116958#issuecomment-1777756937
remove change-id assertion in bootstrap test
In the bootstrap test, the assertion of the change-id fails whenever we update the change-id next to a breaking change in build configurations. This commit removes the assertion, as it's not critical or useful to have.
ref https://github.com/rust-lang/rust/pull/115898#issuecomment-1775909050
Update books
## rust-lang/book
1 commits in 72187f5cd0beaaa9c6f584156bcd88f921871e83..3dca2fc50b922a8efb94903b9fee8bb42ab48f38
2023-10-19 18:01:47 UTC to 2023-10-19 18:01:47 UTC
- Fix cargo doc links (rust-lang/book#3751)
## rust-embedded/book
1 commits in eac173690b8cc99094e1d88bd49dd61127fbd285..22bca3d0f6e9b9b556689b54ce96f25b46ecd1b3
2023-10-16 22:47:38 UTC to 2023-10-16 22:47:38 UTC
- Improved hardware.md chapter. (rust-embedded/book#361)
## rust-lang/nomicon
1 commits in ddfa4214487686e91b21aa29afb972c08a8f0d5b..1842257814919fa62e81bdecd5e8f95be2839dbb
2023-10-17 15:11:58 UTC to 2023-10-17 15:11:58 UTC
- Fixed `Hole::get` marked as unsafe in `exception-safety.md` (rust-lang/nomicon#427)
## rust-lang/reference
2 commits in 142b2ed77d33f37a9973772bd95e6144ed9dce43..16fd3c06d9e558dae2d52000818274ae70c9e90a
2023-10-14 22:31:04 UTC to 2023-10-11 15:35:55 UTC
- Adjust reference for return-position `impl Trait` in trait and `async fn` in trait (rust-lang/reference#1409)
- Fix temporary drop scope for last expression. (rust-lang/reference#1416)
## rust-lang/rust-by-example
1 commits in 8eb3a01ab74c567b7174784892fb807f2c632d6b..6709beeb7d0fbc5ffc91ac4893a24434123b9bfa
2023-10-20 19:11:21 UTC to 2023-10-20 19:11:21 UTC
- docs: fix a typo (rust-lang/rust-by-example#1752)
## rust-lang/rustc-dev-guide
5 commits in b98af7d661e4744baab81fb8dc7a049e44a4a998..b0ee9ec8fa59a6c7620165e061f4747202377a62
2023-10-22 03:18:44 UTC to 2023-10-11 06:30:26 UTC
- Add WF to glossary (rust-lang/rustc-dev-guide#1810)
- recommend `unpretty=hir` alongside `unpretty=hir-tree` (rust-lang/rustc-dev-guide#1804)
- Start a chapter about the evolving const effect system (rust-lang/rustc-dev-guide#1808)
- Document subtle implied bounds issue in RPITIT inference (rust-lang/rustc-dev-guide#1807)
- [suggested.md] `changelog-seen` -> `change-id` in `shell.nix` (rust-lang/rustc-dev-guide#1806)
Validate `feature` and `since` values inside `#[stable(…)]`
Previously the string passed to `#[unstable(feature = "...")]` would be validated as an identifier, but not `#[stable(feature = "...")]`. In the standard library there were `stable` attributes containing the empty string, and kebab-case string, neither of which should be allowed.
Pre-existing validation of `unstable`:
```rust
// src/lib.rs
#![allow(internal_features)]
#![feature(staged_api)]
#![unstable(feature = "kebab-case", issue = "none")]
#[unstable(feature = "kebab-case", issue = "none")]
pub struct Struct;
```
```console
error[E0546]: 'feature' is not an identifier
--> src/lib.rs:5:1
|
5 | #![unstable(feature = "kebab-case", issue = "none")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
For an `unstable` attribute, the need for an identifier is obvious because the downstream code needs to write a `#![feature(...)]` attribute containing that identifier. `#![feature(kebab-case)]` is not valid syntax and `#![feature(kebab_case)]` would not work if that is not the name of the feature.
Having a valid identifier even in `stable` is less essential but still useful because it allows for informative diagnostic about the stabilization of a feature. Compare:
```rust
// src/lib.rs
#![allow(internal_features)]
#![feature(staged_api)]
#![stable(feature = "kebab-case", since = "1.0.0")]
#[stable(feature = "kebab-case", since = "1.0.0")]
pub struct Struct;
```
```rust
// src/main.rs
#![feature(kebab_case)]
use repro::Struct;
fn main() {}
```
```console
error[E0635]: unknown feature `kebab_case`
--> src/main.rs:3:12
|
3 | #![feature(kebab_case)]
| ^^^^^^^^^^
```
vs the situation if we correctly use `feature = "snake_case"` and `#![feature(snake_case)]`, as enforced by this PR:
```console
warning: the feature `snake_case` has been stable since 1.0.0 and no longer requires an attribute to enable
--> src/main.rs:3:12
|
3 | #![feature(snake_case)]
| ^^^^^^^^^^
|
= note: `#[warn(stable_features)]` on by default
```
Windows: Support sub-millisecond sleep
Use `CreateWaitableTimerExW` with `CREATE_WAITABLE_TIMER_HIGH_RESOLUTION`. Does not work before Windows 10, version 1803 so in that case we fallback to using `Sleep`.
I've created a `WaitableTimer` type so it can one day be adapted to also support waiting to an absolute time (which has been talked about). Note though that it currently returns `Err(())` because we can't do anything with the errors other than fallback to the old `Sleep`. Feel free to tell me to do errors properly. It just didn't seem worth constructing an `io::Error` if we're never going to surface it to the user. And it *should* all be infallible anyway unless the OS is too old to support it.
Closes#43376
In the bootstrap test, the assertion of the change-id
fails whenever we update the change-id next to a breaking change
in build configurations. This commit removes the assertion,
as it's not critical or useful to have.
Signed-off-by: onur-ozkan <work@onurozkan.dev>
