rust/tests/ui/rust-2024
bors 37d56daac6 Auto merge of #128771 - carbotaniuman:stabilize_unsafe_attr, r=nnethercote
Stabilize `unsafe_attributes`

# Stabilization report

## Summary

This is a tracking issue for the RFC 3325: unsafe attributes

We are stabilizing `#![feature(unsafe_attributes)]`,  which makes certain attributes considered 'unsafe', meaning that they must be surrounded by an `unsafe(...)`, as in `#[unsafe(no_mangle)]`.

RFC: rust-lang/rfcs#3325
Tracking issue: #123757

## What is stabilized

### Summary of stabilization

Certain attributes will now be designated as unsafe attributes, namely, `no_mangle`, `export_name`, and `link_section` (stable only), and these attributes will need to be called by surrounding them in `unsafe(...)` syntax. On editions prior to 2024, this is simply an edition lint, but it will become a hard error in 2024. This also works in `cfg_attr`, but `unsafe` is not allowed for any other attributes, including proc-macros ones.

```rust
#[unsafe(no_mangle)]
fn a() {}

#[cfg_attr(any(), unsafe(export_name = "c"))]
fn b() {}
```

For a table showing the attributes that were considered to be included in the list to require unsafe, and subsequent reasoning about why each such attribute was or was not included, see [this comment here](https://github.com/rust-lang/rust/pull/124214#issuecomment-2124753464)

## Tests

The relevant tests are in `tests/ui/rust-2024/unsafe-attributes` and `tests/ui/attributes/unsafe`.
2024-08-17 22:48:42 +00:00
..
prelude-migration
unsafe-attributes
unsafe-extern-blocks
box-slice-into-iter-ambiguous.fixed
box-slice-into-iter-ambiguous.rs
box-slice-into-iter-ambiguous.stderr
gen-kw-in-macro.rs
gen-kw.e2015.stderr
gen-kw.e2018.stderr
gen-kw.rs
prelude2024.rs
safe-outside-extern.gated.stderr
safe-outside-extern.rs
safe-outside-extern.stderr
safe-outside-extern.ungated.stderr
unsafe-before_exec.e2024.stderr CommandExt::before_exec: deprecate safety in edition 2024 2024-08-14 14:04:11 +02:00
unsafe-before_exec.rs CommandExt::before_exec: deprecate safety in edition 2024 2024-08-14 14:04:11 +02:00
unsafe-env-suggestion.fixed
unsafe-env-suggestion.rs
unsafe-env-suggestion.stderr #[deprecated_safe_2024]: Also use the // TODO: hint in the compiler error 2024-08-13 11:32:47 +02:00
unsafe-env.e2021.stderr
unsafe-env.e2024.stderr
unsafe-env.rs