Rollup of 14 pull requests #144844
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Rollup of 14 pull requests #144844
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Since it's cfg'd instead of type-aliased
Conceptually `EarlyBinder` does not contain an `Interner` so it shouldn't tell Rust it does via `PhantomData`. This is necessary for rust-analyzer as it stores `EarlyBinder`s in query results which require `Sync`, placing restrictions on our interner setup.
…zelmann Port #[macro_export] to the new attribute parsing infrastructure Ports macro_export to the new attribute parsing infrastructure for rust-lang#131229 (comment) r? `@oli-obk` cc `@JonathanBrouwer` `@jdonszelmann`
…narycat,fmease [rustdoc] Correctly handle `should_panic` doctest attribute and fix `--no-run` test flag on the 2024 edition Fixes rust-lang#143009. Fixes rust-lang#143858. Since it includes fixes from rust-lang#143453, it's taking it over (commits 2, 3 and 4 are from rust-lang#143453). For `--no-run`, we forgot to check the "global" options in the 2024 edition, fixed in the first commit. For `should_panic` fix, the exit code check has been fixed. cc `@TroyKomodo` (thanks so much for providing such a complete test, made my life a lot easier!) r? `@notriddle`
…Noratrieb Implement `hash_map` macro Implementation of rust-lang#144032 Implements the `hash_map` macro under `std/src/macros.rs`.
…oli-obk
Add lint against dangling pointers from local variables
## `dangling_pointers_from_locals`
*warn-by-default*
The `dangling_pointers_from_locals` lint detects getting a pointer to data of a local that will be dropped at the end of the function.
### Example
```rust
fn f() -> *const u8 {
let x = 0;
&x // returns a dangling ptr to `x`
}
```
```text
warning: a dangling pointer will be produced because the local variable `x` will be dropped
--> $DIR/dangling-pointers-from-locals.rs:10:5
|
LL | fn simple() -> *const u8 {
| --------- return type of the function is `*const u8`
LL | let x = 0;
| - `x` is defined inside the function and will be drop at the end of the function
LL | &x
| ^^
|
= note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned
= note: `#[warn(dangling_pointers_from_locals)]` on by default
```
### Explanation
Returning a pointer from a local value will not prolong its lifetime, which means that the value can be dropped and the allocation freed while the pointer still exists, making the pointer dangling.
If you need stronger guarantees, consider using references instead, as they are statically verified by the borrow-checker to never dangle.
------
This is related to GitHub codeql [CWE-825](https://github.com/github/codeql/blob/main/rust/ql/src/queries/security/CWE-825/AccessAfterLifetimeBad.rs) which shows examples of such simple miss-use.
It should be noted that C compilers warns against such patterns even without `-Wall`, https://godbolt.org/z/P7z98arrc.
------
`@rustbot` labels +I-lang-nominated +T-lang
cc `@traviscross`
r? compiler
…r-width, r=Noratrieb Make target pointer width in target json an integer r? Noratrieb cc `@RalfJung` (https://github.com/rust-lang/rust/pull/142352/files#r2230380120)
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Rollup of 14 pull requests Successful merges: - #143857 (Port #[macro_export] to the new attribute parsing infrastructure) - #143900 ([rustdoc] Correctly handle `should_panic` doctest attribute and fix `--no-run` test flag on the 2024 edition) - #144070 (Implement `hash_map` macro ) - #144322 (Add lint against dangling pointers from local variables) - #144443 (Make target pointer width in target json an integer) - #144667 (`AlignmentEnum` should just be `repr(usize)` now) - #144779 (Implement debugging output of the bootstrap Step graph into a DOT file) - #144790 (Multiple bounds checking elision failures) - #144794 (Port `#[coroutine]` to the new attribute system) - #144808 (`Interner` arg to `EarlyBinder` does not affect auto traits) - #144816 (Update E0562 to account for the new impl trait positions) - #144822 (Return a struct with named fields from `hash_owner_nodes`) - #144824 (Updated test links in compiler) - #144829 (Use full flag name in strip command for Darwin) r? `@ghost` `@rustbot` modify labels: rollup
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Successful merges:
should_panicdoctest attribute and fix--no-runtest flag on the 2024 edition #143900 ([rustdoc] Correctly handleshould_panicdoctest attribute and fix--no-runtest flag on the 2024 edition)hash_mapmacro #144070 (Implementhash_mapmacro )AlignmentEnumshould just berepr(usize)now #144667 (AlignmentEnumshould just berepr(usize)now)#[coroutine]to the new attribute system #144794 (Port#[coroutine]to the new attribute system)Internerarg toEarlyBinderdoes not affect auto traits #144808 (Internerarg toEarlyBinderdoes not affect auto traits)hash_owner_nodes#144822 (Return a struct with named fields fromhash_owner_nodes)r? @ghost
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