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make `LayoutError::Cycle` carry `ErrorGuaranteed`
Addresses a FIXME, and also I think it's wise for error variants to carry their `ErrorGuaranteed` -- makes it easier to use that `ErrorGuaranteed` for creating, e.g. `TyKind::Error` and other error kinds. Splitting out from #117703.
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- `ReFree` -> `ReLateParam`
- `ReEarlyBound` -> `ReEarlyParam`
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Rollup of 4 pull requests
Successful merges:
- #114224 (rustc_llvm: Link to libkstat on Solaris/SPARC)
- #117695 (Reorder checks to make sure potential missing expect on Option/Result…)
- #117870 (`fn args_ref_X` to `fn args_X`)
- #117879 (tests: update check for inferred nneg on zext)
r? `@ghost`
`@rustbot` modify labels: rollup
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`fn args_ref_X` to `fn args_X`
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Stabilize `result_option_inspect`
This PR stabilizes `result_option_inspect`:
```rust
// core::option
impl Option<T> {
pub fn inspect<F: FnOnce(&T)>(self, f: F) -> Self;
}
// core::result
impl Result<T, E> {
pub fn inspect<F: FnOnce(&T)>(self, f: F) -> Self;
pub fn inspect_err<F: FnOnce(&E)>(self, f: F) -> Self;
}
```
<br>
Tracking issue: https://github.com/rust-lang/rust/issues/91345.
Implementation PR: https://github.com/rust-lang/rust/pull/91346.
Closes https://github.com/rust-lang/rust/issues/91345.
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- `HAS_RE_LATE_BOUND` -> `HAS_RE_BOUND`
- `HAS_TY_LATE_BOUND` -> `HAS_TY_BOUND`
- `HAS_CT_LATE_BOUND` -> `HAS_CT_BOUND`
- `HAS_LATE_BOUND` -> `HAS_BOUND_VARS`
- `fn has_late_bound_regions` -> `fn has_bound_regions`
- `fnhas_non_region_late_bound` -> `fn has_non_region_bound_vars`
- `fn has_late_bound_vars` -> `fn has_bound_vars`
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other changes:
- `Region::new_late_bound` -> `Region::new_bound`
- `Region::is_late_bound` -> `Region::is_bound`
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This is a aspect of Rust that frequently trips up people who are not
aware of it yet. This diagnostic attempts to explain what's happening
and why the lifetime constraint, that was never mentioned in the source,
arose.
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and unsigned shift amounts in the same branch
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Add `std::hash::{DefaultHasher, RandomState}` exports (needs FCP)
This implements rust-lang/libs-team#267 to move the libstd hasher types to `std::hash` where they belong, instead of `std::collections::hash_map`.
<details><summary>The below no longer applies, but is kept for clarity.</summary>
This is a small refactor for #27242, which moves the definitions of `RandomState` and `DefaultHasher` into `std::hash`, but in a way that won't be noticed in the public API.
I've opened rust-lang/libs-team#267 as a formal ACP to move these directly into the root of `std::hash`, but for now, they're at least separated out from the collections code in a way that will make moving that around easier.
I decided to simply copy the rustdoc for `std::hash` from `core::hash` since I think it would be ideal for the two to diverge longer-term, especially if the ACP is accepted. However, I would be willing to factor them out into a common markdown document if that's preferred.
</details>
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also adds some comments
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Fix some clippy perf lints
`@matthiaskrgr` gave me the output of a clippy run with perf lints enabled. This PR fixes ones that I thought were worth fixing.
r? `@cuviper`
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Small changes w/ `query::Erase<_>`
r? `@cjgillot`
cc `@Zoxc`
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Improve diagnostic for const ctors in array repeat expressions
Fixes #113912
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Thir unsafeck fixes
- Recognise thread local statics in THIR unsafeck
- Add suggestion for unsafe_op_in_unsafe_fn
- Fix unsafe checking of let expressions
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This fixes some THIR unsafety checking errors not being emitted for
let expressions in these situations.
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Make the randomize feature of rustc_abi additive
The goal here is to make rust-analyzer able to build with the `rustc_private` versions of the rustc crates it depends on. See #116847
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Make sure that predicates with unmentioned bound vars are still considered global in the old solver
In the old solver, we consider predicates with late-bound vars to not be "global":
https://github.com/rust-lang/rust/blob/9c8a2694fadf3900c4d7880f6357cee60e9aa39b/compiler/rustc_trait_selection/src/traits/select/mod.rs#L1840-L1844
The implementation of `has_late_bound_vars` was modified in #115834 so that we'd properly anonymize binders that had late-bound vars but didn't reference them. This fixed an ICE.
However, this also led to a behavioral change in https://github.com/rust-lang/rust/issues/117056#issuecomment-1775014545 for a couple of crates, which now consider `for<'a> GL33: Shader` (note the binder var that is *not* used in the predicate) to not be "global". This forces associated types to not be normalizable due to the old trait solver being dumb.
This PR distinguishes types which *reference* late-bound vars and binders which *have* late-bound vars. The latter is represented with the new type flag `TypeFlags::HAS_BINDER_VARS`, which is used when we only care about knowing whether binders have vars in their bound var list (even if they're not used, like for binder anonymization).
This should fix (after beta backport) the `luminance-gl` and `luminance-webgl` crates in #117056.
r? types
**(priority is kinda high on a review here given beta becomes stable on November 16.)**
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Remove `'tcx` lifetime on `PlaceholderConst`
The `'tcx` lifetime is not needed for anything, so this is a continuation of #117139.
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global in the old solver
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They've been deprecated for four years.
This commit includes the following changes.
- It eliminates the `rustc_plugin_impl` crate.
- It changes the language used for lints in
`compiler/rustc_driver_impl/src/lib.rs` and
`compiler/rustc_lint/src/context.rs`. External lints are now called
"loaded" lints, rather than "plugins" to avoid confusion with the old
plugins. This only has a tiny effect on the output of `-W help`.
- E0457 and E0498 are no longer used.
- E0463 is narrowed, now only relating to unfound crates, not plugins.
- The `plugin` feature was moved from "active" to "removed".
- It removes the entire plugins chapter from the unstable book.
- It removes quite a few tests, mostly all of those in
`tests/ui-fulldeps/plugin/`.
Closes #29597.
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`rustc_span` cleanups
Just some things I found while looking over this crate.
r? `@oli-obk`
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Fix incorrect trait bound restriction suggestion
Suggest
```
error[E0308]: mismatched types
--> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
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LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
| - - expected `B` because of return type
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| expected this type parameter
LL | return a.bar();
| ^^^^^^^ expected type parameter `B`, found associated type
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= note: expected type parameter `B`
found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
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LL | pub fn foo<A: MyTrait<T = B>, B>(a: A) -> B {
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```
instead of
```
error[E0308]: mismatched types
--> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
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LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
| - - expected `B` because of return type
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| expected this type parameter
LL | return a.bar();
| ^^^^^^^ expected type parameter `B`, found associated type
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= note: expected type parameter `B`
found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
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LL | pub fn foo<A: MyTrait + <T = B>, B>(a: A) -> B {
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```
Fix #117501.
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dropck_outlives check whether generator witness needs_drop
see https://rust-lang.zulipchat.com/#narrow/stream/326866-t-types.2Fnominated/topic/.23116242.3A.20Code.20no.20longer.20compiles.20after.20-Zdrop-tracking-mir.20.E2.80.A6/near/398311627 for an explanation.
Fixes #116242 (or well, the repro by `@jamuraa` in https://github.com/rust-lang/rust/issues/116242#issuecomment-1739802047). I did not add a regression test as it depends on other crates. We do have 1 test going from fail to pass, showing the intended behavior.
r? types
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Suggest
```
error[E0308]: mismatched types
--> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
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LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
| - - expected `B` because of return type
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| expected this type parameter
LL | return a.bar();
| ^^^^^^^ expected type parameter `B`, found associated type
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= note: expected type parameter `B`
found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
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LL | pub fn foo<A: MyTrait<T = B>, B>(a: A) -> B {
| +++++++
```
instead of
```
error[E0308]: mismatched types
--> $DIR/restrict-assoc-type-of-generic-bound.rs:9:12
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LL | pub fn foo<A: MyTrait, B>(a: A) -> B {
| - - expected `B` because of return type
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| expected this type parameter
LL | return a.bar();
| ^^^^^^^ expected type parameter `B`, found associated type
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= note: expected type parameter `B`
found associated type `<A as MyTrait>::T`
help: consider further restricting this bound
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LL | pub fn foo<A: MyTrait + <T = B>, B>(a: A) -> B {
| +++++++++
```
Fix #117501.
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use global cache when computing proof trees
we're writing the solver while relying on the existence of the global cache to avoid exponential blowup. By disabling the global cache when building proof trees, it is easy to get hangs, e.g. when computing intercrate ambiguity causes.
Removes the unstable `-Zdump_solver_proof_tree_use_cache` option, as we now always return a full proof tree.
r? `@compiler-errors`
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Most notably, this commit changes the `pub use crate::*;` in that file
to `use crate::*;`. This requires a lot of `use` items in other crates
to be adjusted, because everything defined within `rustc_span::*` was
also available via `rustc_span::source_map::*`, which is bizarre.
The commit also removes `SourceMap::span_to_relative_line_string`, which
is unused.
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Support enum variants in offset_of!
This MR implements support for navigating through enum variants in `offset_of!`, placing the enum variant name in the second argument to `offset_of!`. The RFC placed it in the first argument, but I think it interacts better with nested field access in the second, as you can then write things like
```rust
offset_of!(Type, field.Variant.field)
```
Alternatively, a syntactic distinction could be made between variants and fields (e.g. `field::Variant.field`) but I'm not convinced this would be helpful.
[RFC 3308 # Enum Support](https://rust-lang.github.io/rfcs/3308-offset_of.html#enum-support-offset_ofsomeenumstructvariant-field_on_variant)
Tracking Issue #106655.
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Match usize/isize exhaustively with half-open ranges
The long-awaited finale to the saga of [exhaustiveness checking for integers](https://github.com/rust-lang/rust/pull/50912)!
```rust
match 0usize {
0.. => {} // exhaustive!
}
match 0usize {
0..usize::MAX => {} // helpful error message!
}
```
Features:
- Half-open ranges behave as expected for `usize`/`isize`;
- Trying to use `0..usize::MAX` will tell you that `usize::MAX..` is missing and explain why. No more unhelpful "`_` is missing";
- Everything else stays the same.
This should unblock https://github.com/rust-lang/rust/issues/37854.
Review-wise:
- I recommend looking commit-by-commit;
- This regresses perf because of the added complexity in `IntRange`; hopefully not too much;
- I measured each `#[inline]`, they all help a bit with the perf regression (tho I don't get why);
- I did not touch MIR building; I expect there's an easy PR there that would skip unnecessary comparisons when the range is half-open.
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Rollup of 5 pull requests
Successful merges:
- #116267 (Some codegen cleanups around SIMD checks)
- #116712 (When encountering unclosed delimiters during lexing, check for diff markers)
- #117416 (Also consider TAIT to be uncomputable if the MIR body is tainted)
- #117421 (coverage: Replace impossible `coverage::Error` with assertions)
- #117438 (Do not ICE on constant evaluation failure in GVN.)
r? `@ghost`
`@rustbot` modify labels: rollup
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