Update bootstrap to edition 2024
The stage0 compiler now supports edition 2024, so we can update bootstrap to it. I manually reviewed all the changes from `cargo fix --edition` and reverted most of them (`if let` -> `matches` changes and two unneeded usages of `use <>`).
r? `@onur-ozkan`
try-job: dist-x86_64-msvc
Fix false-positive in `expr_or_init` and in the `invalid_from_utf8` lint
This PR fixes the logic for finding initializer in the `expr_or_init` and `expr_or_init_with_outside_body` functions.
If the binding were to be mutable (`let mut`), the logic wouldn't consider that the initializer expression could have been modified and would return the init expression even-trough multiple subsequent assignments could have been done.
Example:
```rust
let mut a = [99, 108, 130, 105, 112, 112]; // invalid, not UTF-8
loop {
a = *b"clippy"; // valid
break;
}
std::str::from_utf8_mut(&mut a); // currently warns, with this PR it doesn't
```
This PR modifies the logic to excludes mutable let bindings.
Found when using `expr_or_init` in https://github.com/rust-lang/rust/pull/119220.
r? compiler
Update books
## rust-lang/book
11 commits in 4a01a9182496f807aaa5f72d93a25ce18bcbe105..81a976a237f84b8392c4ce1bd5fd076eb757a2eb
2025-02-27 22:10:41 UTC to 2025-02-24 18:36:27 UTC
- Ch. 10: Make social media discussion generic. (rust-lang/book#4249)
- Another Ch. 17 -> 18 fix (rust-lang/book#4247)
- Ch. 05: further tweak to wording about `user1` availability (rust-lang/book#4246)
- Ch. 02: Fix rand version mistake (from testing) (rust-lang/book#4245)
- Ch. 19: Correct the discussion of `fn` type and closures (rust-lang/book#4244)
- Edition maintenance: scripting the updates for future work (rust-lang/book#4243)
- Ch. 17: fresh-eyes edits (rust-lang/book#4242)
- Ch. 17: drop lifetime not required in 2024 Edition (rust-lang/book#4212)
- Appendix B, Operators: Replace “member access” with “field access” and “method call”. (rust-lang/book#4240)
- Update to Rust 1.85 and 2024 Edition! (rust-lang/book#4241)
- Chapter 1: fix 'four things' now that spacing is not emphasized (rust-lang/book#4239)
## rust-lang/edition-guide
2 commits in daa4b763cd848f986813b5cf8069e1649f7147af..1e27e5e6d5133ae4612f5cc195c15fc8d51b1c9c
2025-03-04 22:02:00 UTC to 2025-02-26 12:47:41 UTC
- Mention both `rustfmt.toml` and `.rustfmt.toml` (rust-lang/edition-guide#372)
- Fix a typo (rust-lang/edition-guide#370)
## rust-lang/nomicon
1 commits in 8f5c7322b65d079aa5b242eb10d89a98e12471e1..b4448fa406a6dccde62d1e2f34f70fc51814cdcc
2025-03-01 04:48:05 UTC to 2025-03-01 04:48:05 UTC
- Update to 2024 edition (rust-lang/nomicon#481)
## rust-lang/reference
8 commits in 615b4cec60c269cfc105d511c93287620032d5b0..dda31c85f2ef2e5d2f0f2f643c9231690a30a626
2025-03-09 14:25:25 UTC to 2025-02-25 16:07:17 UTC
- Rework note blocks and change admonition rendering (rust-lang/reference#1754)
- Add more information on rules and tests (rust-lang/reference#1753)
- Mention `explicit_builtin_cfgs_in_flags` lint cfg chapter (rust-lang/reference#1747)
- fixup test links (rust-lang/reference#1741)
- Fix diagnostics typo: `do_no_recommend` -> `do_not_recommend` (rust-lang/reference#1749)
- panic runtime and C-unwind documentation (rust-lang/reference#1226)
- Closures: fix example of desugaring (rust-lang/reference#1743)
- Update boolean.md, Comment breaks paragraph format (rust-lang/reference#1744)
## rust-lang/rust-by-example
1 commits in 66543bbc5b7dbd4e679092c07ae06ba6c73fd912..6f69823c28ae8d929d6c815181c73d3e99ef16d3
2025-03-09 13:12:24 UTC to 2025-03-09 13:12:24 UTC
- Update mdbook to 0.4.46 (rust-lang/rust-by-example#1914)
try-job: x86_64-gnu-distcheck
Elaborate trait assumption in `receiver_is_dispatchable`
Fixes#138172. See comment on the linked test.
Probably not a fix for the general problem, bc I think this may still be incomplete for other weird `where` clauses on the receiver. But 🤷, supertraits seems like an obvious one to fix.
Add PeekMut::refresh
I'm not sure if this should go through ACP or not. BinaryHeap is not the most critical data structure in the standard library and it would be understandable if maintainer throughput is thus too limited to accept this PR without a proper design phase that ensures the required understanding of consequence over a longer time period.
This aims to improve the useability of heaps for priority-based work queues. In certain scenarios, modifications on the most relevant or critical items are performed until a condition that determines the work items have been sufficiently addressed. For instance the criticality could be a deadline that is relaxed whenever some part of a work item is completed. Such a loop will repeatedly access the most critical item and put it back in a sorted position when it is complete. Crucially, due to the ordering invariant we know that all necessary work was performed when the completed item remains the most critical. Getting this information from the heap position avoids a (potentially more costly) check on the item state itself.
A customized `drop` with boolean result would avoid up to two more comparisons performed in both the last no-op refresh and Drop code but this occurs once in each execution of the above scenario whereas refresh occurs any number of times. Also note that the comparison overhead of Drop is only taken if the element is mutably inspected to determine the end condition, i.e. not when refresh itself is the break condition.
strip `-Wlinker-messages` wrappers from `rust-lld` rmake test
The `tests/run-make/rust-lld` rmake test is failing locally on my M1, due to linker messages being in a different shape than the test expects: it asserts that the LLD version is the first linker message, which is seemingly not always the case on osx I guess.
```console
thread 'main' panicked at /Users/lqd/rust/lqd-rust/tests/run-make/rust-lld/rmake.rs:24:5:
the LLD version string should be present in the output logs:
warning: linker stderr: rust-lld: directory not found for option -L/usr/local/lib
LLD 20.1.0 (https://github.com/rust-lang/llvm-project.git 1c3bb96fdb6db7b8e8f24edb016099c223fdd27e)
Library search paths:
/Users/lqd/rust/lqd-rust/build/aarch64-apple-darwin/test/run-make/rust-lld/rmake_out
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib
Framework search paths:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks
```
This PR normalizes away the `-Wlinker-messages` wrappers around the linker output, to remove the requirement that the linker version is the first linker message / is prefixed with the warning wrapper in the regex.
(also another strange thing to explain the pre-existing regex: it seems the LLD version is sometimes output on stderr sometimes on stdout cool stuff)
We could do this for the other lld rmake tests, but they're only enabled on x64 linux so less likely to have random linker messages appearing without anyone noticing.
It reinterprets uninitialized memory as initialized and does not drop
existing elements of the Vec. Fix that.
Additionally, make it more general by appending, instead of overwriting
existing elements, and rename it to `append_to_enclave_vec`. A caller
can simply call `.clear()` before, for the old behavior.
Allow bounds checks when enumerating `IndexSlice` to be elided
Without this hint, each loop iteration has to separately bounds check the index. See https://godbolt.org/z/zrfPY4Ten for an example.
This is technically a behaviour change, but only in cases where the compiler is going to crash anyways.
The idea is to identify cases of symbols/identifiers that are not
expected to be used. There isn't a perfectly sharp line between "dummy"
and "not dummy", but I think it's useful nonetheless.
This is never hit in the test suite.
At some point the check should be removed entirely. There are a million
places in the compiler where an empty symbol doesn't make sense, so a
check of this nature has almost zero value. But I'll leave it in place
for now just in case it gets hit by fuzzing or in the wild.
Continuing the work from #137350.
Removes the unused methods: `expect_variant`, `expect_field`,
`expect_foreign_item`.
Every method gains a `hir_` prefix.
To make room for the moving of `Map::attrs` to `TyCtxt::hir_attrs` in
the next commit. (It makes sense to rename the query, because it has
many fewer uses than the method.)
Rollup of 10 pull requests
Successful merges:
- #137715 (Allow int literals for pattern types with int base types)
- #138002 (Disable CFI for weakly linked syscalls)
- #138051 (Add support for downloading GCC from CI)
- #138231 (Prevent ICE in autodiff validation by emitting user-friendly errors)
- #138245 (stabilize `ci_rustc_if_unchanged_logic` test for local environments)
- #138256 (Do not feed anon const a type that references generics that it does not have)
- #138284 (Do not write user type annotation for const param value path)
- #138296 (Remove `AdtFlags::IS_ANONYMOUS` and `Copy`/`Clone` condition for anonymous ADT)
- #138352 (miri native_calls: ensure we actually expose *mutable* provenance to the memory FFI can access)
- #138354 (remove redundant `body` arguments)
r? `@ghost`
`@rustbot` modify labels: rollup
We can create the expected error manually, rather than trying to produce
a real one, so the error conversion test can run on all targets. Before,
it was only running on 64-bit and not miri.
In Fedora, we also found that s390x was not getting the expected error,
"successfully" allocating the huge size because it was optimizing the
real `malloc` call away. It's possible to counter that by looking at the
pointer in any way, like a debug print, but it's more robust to just
deal with errors directly, since this test is only about conversion.
