bors [Fri, 3 Feb 2023 17:53:49 +0000 (17:53 +0000)]
Auto merge of #107642 - Dylan-DPC:rollup-edcqhm5, r=Dylan-DPC
Rollup of 6 pull requests
Successful merges:
- #107082 (Autotrait bounds on dyn-safe trait methods)
- #107427 (Add candidates for DiscriminantKind builtin)
- #107539 (Emit warnings on unused parens in index expressions)
- #107544 (Improve `TokenCursor`.)
- #107585 (Don't cause a cycle when formatting query description that references a FnDef)
- #107633 (Fix suggestion for coercing Option<&String> to Option<&str>)
Dylan DPC [Fri, 3 Feb 2023 17:34:52 +0000 (23:04 +0530)]
Rollup merge of #107585 - compiler-errors:fndef-sig-cycle, r=oli-obk
Don't cause a cycle when formatting query description that references a FnDef
When a function returns `-> _`, we use typeck to compute what the resulting type of the body _should_ be. If we call another query inside of typeck and hit a cycle error, we attempt to report the cycle error which requires us to compute all of the query descriptions for the stack.
However, if one of the queries in that cycle has a query description that references this function as a FnDef type, we'll cause a *second* cycle error from within the cycle error reporting code, since rendering a FnDef requires us to compute its signature. This causes an unwrap to ICE, since during the *second* cycle reporting code, we try to look for a job that isn't in the active jobs list.
We can avoid this by using `with_no_queries!` when computing these query descriptions.
Fixes #107089
The only drawback is that the rendering of opaque types in cycles regresses a bit :| I'm open to alternate suggestions about how we may handle this...
Dylan DPC [Fri, 3 Feb 2023 17:34:49 +0000 (23:04 +0530)]
Rollup merge of #107082 - dtolnay:autotraits, r=lcnr
Autotrait bounds on dyn-safe trait methods
This PR is a successor to #106604 implementing the approach encouraged by https://github.com/rust-lang/rust/pull/106604#issuecomment-1387353737.
**I propose making it legal to use autotraits as trait bounds on the `Self` type of trait methods in a trait object.** https://github.com/rust-lang/rust/issues/51443#issuecomment-1374847313 justifies why this use case is particularly important in the context of the async-trait crate.
trait MyTrait {
fn f(&self) where Self: AutoTrait;
}
fn main() {
let _: &dyn MyTrait;
}
```
Previously this would fail with:
```console
error: the trait `MyTrait` cannot be made into an object
--> src/main.rs:7:8
|
7 | fn f(&self) where Self: AutoTrait;
| ^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #51443 <https://github.com/rust-lang/rust/issues/51443>
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> src/main.rs:7:8
|
6 | trait MyTrait {
| ------- this trait cannot be made into an object...
7 | fn f(&self) where Self: AutoTrait;
| ^ ...because method `f` references the `Self` type in its `where` clause
= help: consider moving `f` to another trait
```
In order for this to be sound without hitting #50781, **I further propose that we disallow handwritten autotrait impls that apply to trait objects.** Both of the following were previously allowed (_on nightly_) and no longer allowed in my proposal:
```rust
auto trait AutoTrait {}
trait MyTrait {}
impl AutoTrait for dyn MyTrait {} // NOT ALLOWED
impl<T: ?Sized> AutoTrait for T {} // NOT ALLOWED
```
(`impl<T> AutoTrait for T {}` remains allowed.)
After this change, traits with a default impl are implemented for a trait object **if and only if** the autotrait is one of the trait object's trait bounds (or a supertrait of a bound). In other words `dyn Trait + AutoTrait` always implements AutoTrait while `dyn Trait` never implements AutoTrait.
bors [Fri, 3 Feb 2023 08:07:47 +0000 (08:07 +0000)]
Auto merge of #107625 - matthiaskrgr:rollup-xr9oldy, r=matthiaskrgr
Rollup of 6 pull requests
Successful merges:
- #106575 (Suggest `move` in nested closure when appropriate)
- #106805 (Suggest `{var:?}` when finding `{?:var}` in inline format strings)
- #107500 (Add tests to assert current behavior of large future sizes)
- #107598 (Fix benchmarks in library/core with black_box)
- #107602 (Parse and recover from type ascription in patterns)
- #107608 (Use triple rather than arch for fuchsia test-runner)
Matthias Krüger [Fri, 3 Feb 2023 05:30:25 +0000 (06:30 +0100)]
Rollup merge of #107608 - P1n3appl3:master, r=tmandry
Use triple rather than arch for fuchsia test-runner
This allows the user of the test-runner script to specify a full triple rather than just an architecture which helps with the transition from the two component to three component target triples for fuchsia.
Matthias Krüger [Fri, 3 Feb 2023 05:30:23 +0000 (06:30 +0100)]
Rollup merge of #106805 - madsravn:master, r=compiler-errors
Suggest `{var:?}` when finding `{?:var}` in inline format strings
Link to issue: https://github.com/rust-lang/rust/issues/106572
This is my first PR to this project, so hopefully I can get some good pointers with me from the first PR.
Currently my idea was to test out whether or not this is the correct solution to this issue and then hopefully expand upon the idea to not only work for Debug formatting but for all of them. If this is a valid solution, I will create a new issue to give a better error message to a broader range of wrong-order formatting.
bors [Fri, 3 Feb 2023 01:19:04 +0000 (01:19 +0000)]
Auto merge of #107241 - clubby789:bootstrap-lto-off, r=simulacrum
Add `rust.lto=off` to bootstrap and set as compiler/library default
Closes #107202
The issue mentions `embed-bitcode=on`, but here https://github.com/rust-lang/rust/blob/c8e6a9e8b6251bbc8276cb78cabe1998deecbed7/src/bootstrap/compile.rs#L379-L381
it appears that this is always set for std stage 1+, so I'm unsure if changes are needed here.
The motivation here is to eliminate the `Option<(Delimiter,
DelimSpan)>`, which is `None` for the outermost token stream and `Some`
for all other token streams.
We are already treating the innermost frame specially -- this is the
`frame` vs `stack` distinction in `TokenCursor`. We can push that
further so that `frame` only contains the cursor, and `stack` elements
contain the delimiters for their children. When we are in the outermost
token stream `stack` is empty, so there are no stored delimiters, which
is what we want because the outermost token stream *has* no delimiters.
This change also shrinks `TokenCursor`, which shrinks `Parser` and
`LazyAttrTokenStreamImpl`, which is nice.
Sometimes the parser needs to desugar a doc comment into `#[doc =
r"foo"]`. Currently it does this in a hacky way: by pushing a "fake" new
frame (one without a delimiter) onto the `TokenCursor` stack.
This commit changes things so that the token stream itself is modified
in place. The nice thing about this is that it means
`TokenCursorFrame::delim_sp` is now only `None` for the outermost frame.
bors [Thu, 2 Feb 2023 17:56:53 +0000 (17:56 +0000)]
Auto merge of #107601 - matthiaskrgr:rollup-07zaafe, r=matthiaskrgr
Rollup of 7 pull requests
Successful merges:
- #106919 (Recover `_` as `..` in field pattern)
- #107493 (Improve diagnostic for missing space in range pattern)
- #107515 (Improve pretty-printing of `HirIdValidator` errors)
- #107524 (Remove both StorageLive and StorageDead in CopyProp.)
- #107532 (Erase regions before doing uninhabited check in borrowck)
- #107559 (Rename `rust_2015` → `is_rust_2015`)
- #107577 (Reinstate the `hir-stats.rs` tests on stage 1.)
Matthias Krüger [Thu, 2 Feb 2023 16:14:07 +0000 (17:14 +0100)]
Rollup merge of #107532 - compiler-errors:erase-regions-in-uninhabited, r=jackh726
Erase regions before doing uninhabited check in borrowck
~Also, fingerprint query keys/values when debug assertions are enabled. This should make it easier to check for issues like this without `-Cincremental`, and make UI tests a bit cleaner.~ edit: moving that to a separate PR
https://github.com/rust-lang/rust/pull/106908 removed StorageDead without the accompanying StorageLive. In loops, execution would see repeated StorageLive, without any StorageDead, which is UB.
So when removing storage statements, we have to remove both StorageLive and StorageDead.
~I also added a MIR validation pass for StorageLive. It may be a bit overzealous.~
Matthias Krüger [Thu, 2 Feb 2023 16:14:06 +0000 (17:14 +0100)]
Rollup merge of #107515 - Swatinem:hirvalidator, r=compiler-errors
Improve pretty-printing of `HirIdValidator` errors
This now uses `node_to_string` for both missing and seen Ids, which includes the snippet of code for which the Id was allocated. Also removes the duplicated printing of `HirId`, as `node_to_string` also includes that.
bors [Thu, 2 Feb 2023 12:01:17 +0000 (12:01 +0000)]
Auto merge of #107478 - compiler-errors:anon-enum-tys-are-ambiguous, r=estebank
Revert "Teach parser to understand fake anonymous enum syntax" and related commits
anonymous enum types are currently ambiguous in positions like:
* `|` operator: `a as fn() -> B | C`
* closure args: `|_: as fn() -> A | B`
I first tried to thread around `RecoverAnonEnum` into all these positions, but the resulting complexity in the compiler is IMO not worth it, or at least worth a bit more thinking time. In the mean time, let's revert this syntax for now, so we can go back to the drawing board.
Matthias Krüger [Thu, 2 Feb 2023 05:52:15 +0000 (06:52 +0100)]
Rollup merge of #107576 - P1n3appl3:master, r=tmandry
Add proc-macro boilerplate to crt-static test
I was seeing this failure when running ui tests with with a `-Cpanic=abort` stdlib targeting fuchsia:
```
---- [ui] tests/ui/proc-macro/crt-static.rs stdout ----
normalized stderr:
warning: building proc macro crate with `panic=abort` may crash the compiler should the proc-macro panic
warning: 1 warning emitted
The actual stderr differed from the expected stderr.
```
`force-host` was enough to stop it from running/failing, not sure if I should also add `needs-unwind`?
Matthias Krüger [Thu, 2 Feb 2023 05:52:14 +0000 (06:52 +0100)]
Rollup merge of #107488 - nnethercote:fix-PartialEq-syntax, r=RalfJung
Fix syntax in `-Zunpretty-expanded` output for derived `PartialEq`.
If you do `derive(PartialEq)` on a packed struct, the output shown by `-Zunpretty=expanded` includes expressions like this:
```
{ self.x } == { other.x }
```
This is invalid syntax. This doesn't break compilation, because the AST nodes are constructed within the compiler. But it does mean anyone using `-Zunpretty=expanded` output as a guide for hand-written impls could get a nasty surprise.
This commit fixes things by instead using this form:
```
({ self.x }) == ({ other.x })
```
Matthias Krüger [Thu, 2 Feb 2023 05:52:13 +0000 (06:52 +0100)]
Rollup merge of #107201 - compiler-errors:confusing-async-fn-note, r=estebank
Remove confusing 'while checking' note from opaque future type mismatches
Maybe I'm just misinterpreting the wording of the note. The only value I can see in this note is that it points out where the async's opaque future is coming from, but the way it's doing it is misleading IMO.
For example:
```rust
note: while checking the return type of the `async fn`
--> $DIR/dont-suggest-missing-await.rs:7:24
|
LL | async fn make_u32() -> u32 {
| ^^^ checked the `Output` of this `async fn`, found opaque type
```
We point at the type `u32` in the HIR, but then say "found opaque type". We also say "while checking"... but we're typechecking a totally different function when we get this type mismatch!
r? ``@estebank`` but feel free to reassign and/or take your time reviewing this. I'd be inclined to also discuss reworking the presentation of this type mismatch to restore some of these labels in a way that makes it more clear what it's trying to point out.
warning: `[user]` (lib) generated 6 warnings
error: could not compile `[user]` due to previous error; 6 warnings emitted
```
</details>
### Minimal example
C code:
```c
#include <stdio.h>
void main() {
int a = 1;
int b = 2;
int c = a + b;
printf("%d", c);
}
```
`clang` command sample:
```
➜ 202301 clang -target x86_64-apple-ios13.0-macabi main.c
clang: error: invalid version number in '-target x86_64-apple-ios13.0-macabi'
➜ 202301 clang -target x86_64-apple-ios14.0-macabi main.c
main.c:2:1: warning: return type of 'main' is not 'int' [-Wmain-return-type]
void main() {
^
main.c:2:1: note: change return type to 'int'
void main() {
^~~~
int
1 warning generated.
➜ 202301 clang -target x86_64-apple-ios15.0-macabi main.c
main.c:2:1: warning: return type of 'main' is not 'int' [-Wmain-return-type]
void main() {
^
main.c:2:1: note: change return type to 'int'
void main() {
^~~~
int
1 warning generated.
➜ 202301 clang -target x86_64-apple-ios-macabi main.c
main.c:2:1: warning: return type of 'main' is not 'int' [-Wmain-return-type]
void main() {
^
main.c:2:1: note: change return type to 'int'
void main() {
^~~~
int
1 warning generated.
➜ 202301 clang --version
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: arm64-apple-darwin22.2.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
```
This PR is a simplified version of #96392, inspired by https://github.com/rust-lang/cc-rs/pull/727
bors [Thu, 2 Feb 2023 02:23:31 +0000 (02:23 +0000)]
Auto merge of #105670 - Xiretza:rustc_parse-diagnostics-4, r=davidtwco
rustc_parse: diagnostics migration, v4
This is all the `rustc_parse` migrations I have in store right now; unfortunately life is pretty busy right now, so I won't be able to do much more in the near future.
This should fix the bors failures in https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra/topic/Every.20rust-lang.2Frust.20PR.20is.20failing.20bors
Arpad Borsos [Tue, 31 Jan 2023 11:09:54 +0000 (12:09 +0100)]
Improve pretty-printing of `HirIdValidator` errors
This now uses `node_to_string` for both missing and seen Ids, which includes
the snippet of code for which the Id was allocated.
Also removes the duplicated printing of `HirId`, as `node_to_string` includes that already.
Similarly, changes all other users of `node_to_string` that do so, and changes the output of `node_to_string`, which is now "$hirid ($what `$span` in $path)".
bors [Wed, 1 Feb 2023 11:37:24 +0000 (11:37 +0000)]
Auto merge of #107257 - inquisitivecrystal:ffi-attr, r=davidtwco
Strengthen validation of FFI attributes
Previously, `codegen_attrs` validated the attributes `#[ffi_pure]`, `#[ffi_const]`, and `#[ffi_returns_twice]` to make sure that they were only used on foreign functions. However, this validation was insufficient in two ways:
1. `codegen_attrs` only sees items for which code must be generated, so it was unable to raise errors when the attribute was incorrectly applied to macros and the like.
2. the validation code only checked that the item with the attr was foreign, but not that it was a foreign function, allowing these attributes to be applied to foreign statics as well.
This PR moves the validation to `check_attr`, which sees all items. It additionally changes the validation to ensure that the attribute's target is `Target::ForeignFunction`, only allowing the attributes on foreign functions and not foreign statics. Because these attributes are unstable, there is no risk for backwards compatibility. The changes also ending up making the code much easier to read.
This PR is best reviewed commit by commit. Additionally, I was considering moving the tests to the `attribute` subdirectory, to get them out of the general UI directory. I could do that as part of this PR or a follow-up, as the reviewer prefers.
bors [Wed, 1 Feb 2023 07:47:29 +0000 (07:47 +0000)]
Auto merge of #107546 - matthiaskrgr:rollup-9rgf2gx, r=matthiaskrgr
Rollup of 6 pull requests
Successful merges:
- #107389 (Fixing confusion between mod and remainder)
- #107442 (improve panic message for slice windows and chunks)
- #107470 (Small bootstrap improvements)
- #107487 (Make the "extra if in let...else block" hint a suggestion)
- #107499 (Do not depend on Generator trait when deducing closure signature)
- #107533 (Extend `-Z print-type-sizes` to distinguish generator upvars+locals from "normal" fields.)
Matthias Krüger [Wed, 1 Feb 2023 04:54:39 +0000 (05:54 +0100)]
Rollup merge of #107499 - compiler-errors:deduce_sig_from_projection-generator-tweak, r=michaelwoerister
Do not depend on Generator trait when deducing closure signature
1. Do not depend on `Generator` trait when deducing closure signature.
2. Compare the name of the `Generator::Return` associated item, rather than its order in the trait. Seems more stable this way.
Matthias Krüger [Wed, 1 Feb 2023 04:54:38 +0000 (05:54 +0100)]
Rollup merge of #107470 - kadiwa4:bootstrap_cleanup, r=albertlarsan68
Small bootstrap improvements
- i/o-less check for `xz` availability
- cache result of NixOS detection
- load correct `bootstrap` module even when a package of that name is installed
- no `-W semicolon_in_expressions_from_macros` – it is warn-by-default
- one type per variable (making dynamic typing less confusing)
- integrate python-side `--help` flag into the argument parser (makes `-hv` work as a short form of `--help --verbose`)
Matthias Krüger [Wed, 1 Feb 2023 04:54:37 +0000 (05:54 +0100)]
Rollup merge of #107389 - zvavybir:master, r=estebank
Fixing confusion between mod and remainder
Like many programming languages, rust too confuses remainder and modulus. The `%` operator and the associated `Rem` trait is (as the trait name suggests) the remainder, but since most people are linguistically more familiar with the modulus the documentation sometimes claims otherwise. This PR tries to fix this problem in rustc.
- chore: Add autolabel for `Command-*` labels (rust-lang/cargo#11664)
- Update cross test instructions for aarch64-apple-darwin (rust-lang/cargo#11663)
- Make cargo install report needed features (rust-lang/cargo#11647)
- docs(contrib): Remove out-of-date process step (rust-lang/cargo#11662)
- Do not error for `auth-required: true` without `-Z sparse-registry` (rust-lang/cargo#11661)
- Warn on commits to non-default branches. (rust-lang/cargo#11655)
- Avoid saving the same future_incompat warning multiple times (rust-lang/cargo#11648)
- Mention current default value in `publish.timeout` docs (rust-lang/cargo#11652)
- Make cargo aware of dwp files. (rust-lang/cargo#11572)
- Reduce target info rustc query calls (rust-lang/cargo#11633)
- Bump to 0.70.0; update changelog (rust-lang/cargo#11640)
- Enable sparse protocol in CI (rust-lang/cargo#11632)
- Fix split-debuginfo support detection (rust-lang/cargo#11347)
- refactor(toml): Move `TomlWorkspaceDependency` out of `TomlDependency` (rust-lang/cargo#11565)
- book: describe how the current resolver sometimes duplicates deps (rust-lang/cargo#11604)
- `cargo add` check `[dependencies]` order without considering the dotted item (rust-lang/cargo#11612)
- Link CoC to www.rust-lang.org/conduct.html (rust-lang/cargo#11622)
- Add more labels to triagebot (rust-lang/cargo#11621)
Fix syntax in `-Zunpretty-expanded` output for derived `PartialEq`.
If you do `derive(PartialEq)` on a packed struct, the output shown by
`-Zunpretty=expanded` includes expressions like this:
```
{ self.x } == { other.x }
```
This is invalid syntax. This doesn't break compilation, because the AST
nodes are constructed within the compiler. But it does mean anyone using
`-Zunpretty=expanded` output as a guide for hand-written impls could get
a nasty surprise.
This commit fixes things by instead using this form:
```
({ self.x }) == ({ other.x })
```
projects / rust.git / log