CFI: Enable KCFI testing of run-pass tests
This enables KCFI-based testing for all the CFI run-pass tests in the suite today. We can add the test header on top of in-flight CFI tests once they land. This is becoming more important as we get closer to leveraging CFI's multiple type attachment feature, as that is where the implementations will have a divergence.
It also enables KCFI as a sanitizer for x86_64 and aarch64 Linux to make this possible. The sanitizer should likely be available for all aarch64, x86_64, and riscv targets, but that isn't critical for initial testing.
Make `TyCtxt::coroutine_layout` take coroutine's kind parameter
For coroutines that come from coroutine-closures (i.e. async closures), we may have two kinds of bodies stored in the coroutine; one that takes the closure's captures by reference, and one that takes the captures by move.
These currently have identical layouts, but if we do any optimization for these layouts that are related to the upvars, then they will diverge -- e.g. https://github.com/rust-lang/rust/pull/120168#discussion_r1536943728.
This PR relaxes the assertion I added in #121122, and instead make the `TyCtxt::coroutine_layout` method take the `coroutine_kind_ty` argument from the coroutine, which will allow us to differentiate these by-move and by-ref bodies.
coverage: Re-enable `UnreachablePropagation` for coverage builds
This is a sequence of 3 related changes:
- Clean up the existing code that scans for unused functions
- Detect functions that were instrumented for coverage, but have had all their coverage statements removed by later MIR transforms (e.g. `UnreachablePropagation`)
- Re-enable `UnreachablePropagation` in coverage builds
Because we now detect functions that have lost their coverage statements, and treat them as unused, we don't need to worry about `UnreachablePropagation` removing all of those statements. This is demonstrated by `tests/coverage/unreachable.rs`.
Fixes#116171.
Soft-destabilize `RustcEncodable` & `RustcDecodable`, remove from prelude in next edition
cc rust-lang/libs-team#272
Any use of `RustcEncodable` and `RustcDecodable` now triggers a deny-by-default lint. The derives have been removed from the 2024 prelude. I specifically chose **not** to document this in the module-level documentation, as the presence in existing preludes is not documented (which I presume is intentional).
This does not implement the proposed change for `rustfix`, which I will be looking into shortly.
With regard to the items in the preludes being stable, this should not be an issue because #15702 has been resolved.
r? libs-api
Update `RwLock` deadlock example to not use shadowing
Tweak variable names in the deadlock example to remove any potential confusion that the behavior is somehow shadowing-related.
Implement `Vec::pop_if`
This PR adds `Vec::pop_if` to the public API, behind the `vec_pop_if` feature.
```rust
impl<T> Vec<T> {
pub fn pop_if<F>(&mut self, f: F) -> Option<T>
where F: FnOnce(&mut T) -> bool;
}
```
Tracking issue: #122741
## Open questions
- [ ] Should the first unit test be split up?
- [ ] I don't see any guidance on ordering of methods in impl blocks, should I move the method elsewhere?
match lowering: build the `Place` instead of keeping a `PlaceBuilder` around
Outside of `MatchPair::new` we don't construct new places, so we don't need to keep a `PlaceBuilder` around.
A bit annoyingly we have to store an `Option<Place>` even though it's never `None` after simplification, but the alternative would be to re-entangle `MatchPair` construction and simplification and I'd rather not do that.
Previously, the documentation for a variant appeared after the documentation
for each of its fields. This was inconsistent with structs and unions, and made
little sense on its own; fields are subordinate to variants and should
therefore appear later in the documentation.
Rollup of 9 pull requests
Successful merges:
- #108675 (Document `adt_const_params` feature in Unstable Book)
- #122120 (Suggest associated type bounds on problematic associated equality bounds)
- #122589 (Fix diagnostics for async block cloning)
- #122835 (Require `DerefMut` and `DerefPure` on `deref!()` patterns when appropriate)
- #123049 (In `ConstructCoroutineInClosureShim`, pass receiver by mut ref, not mut pointer)
- #123055 (enable cargo miri test doctests)
- #123057 (unix fs: Make hurd using explicit new rather than From)
- #123087 (Change `f16` and `f128` clippy stubs to be nonpanicking)
- #123103 (Rename `Inherited` -> `TypeckRootCtxt`)
r? `@ghost`
`@rustbot` modify labels: rollup
Rename `Inherited` -> `TypeckRootCtxt`
`Inherited` is a confusing name. Rename it to `TypeckRootCtxt`.
I don't think this needs a type MCP or anything since it's not nearly as pervasive as `FnCtxt` , for example.
r? `@lcnr` `@oli-obk`
Change `f16` and `f128` clippy stubs to be nonpanicking
It turns out there is a bit of a circular dependency - I cannot add anything to `core` because Clippy fails, and I can't actually add correct Clippy implementations without new implementations from `core`.
Change some of the Clippy stubs from `unimplemented!` to success values and leave a FIXME in their place to mitigate this.
Fixes <https://github.com/rust-lang/rust/issues/122587>
unix fs: Make hurd using explicit new rather than From
408c0ea216 ("unix time module now return result") dropped the From impl for SystemTime, breaking the hurd build (and probably the horizon build)
Fixes#123032
In `ConstructCoroutineInClosureShim`, pass receiver by mut ref, not mut pointer
The receivers were compatible at codegen time, but did not necessarily have the same layouts due to niches, which was caught by miri.
Fixesrust-lang/miri#3400
r? oli-obk
Suggest associated type bounds on problematic associated equality bounds
Fixes#105056. TL;DR: Suggest `Trait<Ty: Bound>` on `Trait<Ty = Bound>` in Rust >=2021.
~~Blocked on #122055 (stabilization of `associated_type_bounds`), I'd say.~~ (merged)
Rollup of 10 pull requests
Successful merges:
- #122766 (store segment and module in `UnresolvedImportError`)
- #122996 (simplify_branches: add comment)
- #123047 (triagebot: Add notification of 2024 issues)
- #123066 (CFI: (actually) check that methods are object-safe before projecting their receivers to `dyn Trait` in CFI)
- #123067 (match lowering: consistently merge simple or-patterns)
- #123069 (Revert `cargo update` changes and bump `download-artifact` to v4)
- #123070 (Add my former address to .mailmap)
- #123086 (Fix doc link to BufWriter in std::fs::File documentation)
- #123090 (Remove `CacheSelector` trait now that we can use GATs)
- #123091 (Delegation: fix ICE on wrong `self` resolution)
r? `@ghost`
`@rustbot` modify labels: rollup
It turns out there is a bit of a circular dependency - I cannot add
anything to `core` because Clippy fails, and I can't actually add
correct Clippy implementations without new implementations from `core`.
Change some of the Clippy stubs from `unimplemented!` to success values
and leave a FIXME in their place to mitigate this.
Fixes <https://github.com/rust-lang/rust/issues/122587>
Delegation: fix ICE on wrong `self` resolution
fixes https://github.com/rust-lang/rust/issues/122874
Delegation item should be wrapped in a `rib` to behave like a regular function during name resolution.
r? `@petrochenkov`
Fix doc link to BufWriter in std::fs::File documentation
It seems that doc link to `BufWriter` in `std::fs::File` doc leads to `BufReader`, not `BufWriter`.
See https://doc.rust-lang.org/std/fs/struct.File.html
match lowering: consistently merge simple or-patterns
There are two places where we expand or-patterns in match lowering: the main one is `test_candidates_with_or`, and there's one in `match_candidates` that's an optimization for the simple case where the whole pattern is just one or-pattern.
To reduce duplication, we merge or-pattern alternatives into a single block when possible, but we only to that in `test_candidates_with_or`. This PR fixes this oversight and merges them in `match_candidates` too.
This is a part of splitting up https://github.com/rust-lang/rust/pull/122046 into smaller bits.
CFI: (actually) check that methods are object-safe before projecting their receivers to `dyn Trait` in CFI
`trait_object_ty` assumed that associated types would be fully determined by the trait. This is *almost* true - const parameters and type parameters are no longer allowed, but lifetime parameters are. Since we erase all lifetime parameters anyways, instantiate it with as many erased regions as it needs.
Fixes: #123053
r? `@compiler-errors`
