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Auto merge of #128771 - carbotaniuman:stabilize_unsafe_attr, r=nnethercote

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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`.
This commit is contained in:
bors 2024-08-17 22:48:42 +00:00
commit 37d56daac6
37 changed files with 64 additions and 134 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
compiler/rustc_ast_passes/src/ast_validation.rs
View File

@ -887,7 +887,7 @@ fn validate_generic_param_order(dcx: DiagCtxtHandle<'_>, generics: &[GenericPara
impl<'a> Visitor<'a> for AstValidator<'a> {
fn visit_attribute(&mut self, attr: &Attribute) {
validate_attr::check_attr(&self.features, &self.session.psess, attr);
validate_attr::check_attr(&self.session.psess, attr);
}
fn visit_ty(&mut self, ty: &'a Ty) {

1
compiler/rustc_ast_passes/src/feature_gate.rs
View File

@ -559,7 +559,6 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
gate_all!(mut_ref, "mutable by-reference bindings are experimental");
gate_all!(precise_capturing, "precise captures on `impl Trait` are experimental");
gate_all!(global_registration, "global registration is experimental");
gate_all!(unsafe_attributes, "`#[unsafe()]` markers for attributes are experimental");
gate_all!(return_type_notation, "return type notation is experimental");
if !visitor.features.never_patterns {

1
compiler/rustc_builtin_macros/src/cfg_accessible.rs
View File

@ -47,7 +47,6 @@ impl MultiItemModifier for Expander {
) -> ExpandResult<Vec<Annotatable>, Annotatable> {
let template = AttributeTemplate { list: Some("path"), ..Default::default() };
validate_attr::check_builtin_meta_item(
&ecx.ecfg.features,
&ecx.sess.psess,
meta_item,
ast::AttrStyle::Outer,

1
compiler/rustc_builtin_macros/src/derive.rs
View File

@ -38,7 +38,6 @@ impl MultiItemModifier for Expander {
let template =
AttributeTemplate { list: Some("Trait1, Trait2, ..."), ..Default::default() };
validate_attr::check_builtin_meta_item(
features,
&sess.psess,
meta_item,
ast::AttrStyle::Outer,

1
compiler/rustc_builtin_macros/src/util.rs
View File

@ -17,7 +17,6 @@ pub(crate) fn check_builtin_macro_attribute(ecx: &ExtCtxt<'_>, meta_item: &MetaI
// All the built-in macro attributes are "words" at the moment.
let template = AttributeTemplate { word: true, ..Default::default() };
validate_attr::check_builtin_meta_item(
&ecx.ecfg.features,
&ecx.sess.psess,
meta_item,
AttrStyle::Outer,

13
compiler/rustc_expand/src/config.rs
View File

@ -265,12 +265,7 @@ impl<'a> StripUnconfigured<'a> {
/// is in the original source file. Gives a compiler error if the syntax of
/// the attribute is incorrect.
pub(crate) fn expand_cfg_attr(&self, cfg_attr: &Attribute, recursive: bool) -> Vec<Attribute> {
validate_attr::check_attribute_safety(
self.features.unwrap_or(&Features::default()),
&self.sess.psess,
AttributeSafety::Normal,
&cfg_attr,
);
validate_attr::check_attribute_safety(&self.sess.psess, AttributeSafety::Normal, &cfg_attr);
let Some((cfg_predicate, expanded_attrs)) =
rustc_parse::parse_cfg_attr(cfg_attr, &self.sess.psess)
@ -395,11 +390,7 @@ impl<'a> StripUnconfigured<'a> {
}
};
validate_attr::deny_builtin_meta_unsafety(
self.features.unwrap_or(&Features::default()),
&self.sess.psess,
&meta_item,
);
validate_attr::deny_builtin_meta_unsafety(&self.sess.psess, &meta_item);
(
parse_cfg(&meta_item, self.sess).map_or(true, |meta_item| {

2
compiler/rustc_expand/src/expand.rs
View File

@ -1882,7 +1882,7 @@ impl<'a, 'b> InvocationCollector<'a, 'b> {
let mut span: Option<Span> = None;
while let Some(attr) = attrs.next() {
rustc_ast_passes::feature_gate::check_attribute(attr, self.cx.sess, features);
validate_attr::check_attr(features, &self.cx.sess.psess, attr);
validate_attr::check_attr(&self.cx.sess.psess, attr);
let current_span = if let Some(sp) = span { sp.to(attr.span) } else { attr.span };
span = Some(current_span);

2
compiler/rustc_feature/src/accepted.rs
View File

@ -392,6 +392,8 @@ declare_features! (
(accepted, universal_impl_trait, "1.26.0", Some(34511)),
/// Allows arbitrary delimited token streams in non-macro attributes.
(accepted, unrestricted_attribute_tokens, "1.34.0", Some(55208)),
/// Allows unsafe attributes.
(accepted, unsafe_attributes, "CURRENT_RUSTC_VERSION", Some(123757)),
/// The `unsafe_op_in_unsafe_fn` lint (allowed by default): no longer treat an unsafe function as an unsafe block.
(accepted, unsafe_block_in_unsafe_fn, "1.52.0", Some(71668)),
/// Allows unsafe on extern declarations and safety qualifiers over internal items.

2
compiler/rustc_feature/src/unstable.rs
View File

@ -622,8 +622,6 @@ declare_features! (
(unstable, type_changing_struct_update, "1.58.0", Some(86555)),
/// Allows unnamed fields of struct and union type
(incomplete, unnamed_fields, "1.74.0", Some(49804)),
/// Allows unsafe attributes.
(unstable, unsafe_attributes, "1.80.0", Some(123757)),
/// Allows const generic parameters to be defined with types that
/// are not `Sized`, e.g. `fn foo<const N: [u8]>() {`.
(incomplete, unsized_const_params, "CURRENT_RUSTC_VERSION", Some(95174)),

1
compiler/rustc_lint_defs/src/builtin.rs
View File

@ -4971,7 +4971,6 @@ declare_lint! {
/// ### Example
///
/// ```rust
/// #![feature(unsafe_attributes)]
/// #![warn(unsafe_attr_outside_unsafe)]
///
/// #[no_mangle]

4
compiler/rustc_parse/src/parser/attr.rs
View File

@ -4,7 +4,7 @@ use rustc_ast::token::{self, Delimiter};
use rustc_errors::codes::*;
use rustc_errors::{Diag, PResult};
use rustc_span::symbol::kw;
use rustc_span::{sym, BytePos, Span};
use rustc_span::{BytePos, Span};
use thin_vec::ThinVec;
use tracing::debug;
@ -265,7 +265,6 @@ impl<'a> Parser<'a> {
let is_unsafe = this.eat_keyword(kw::Unsafe);
let unsafety = if is_unsafe {
let unsafe_span = this.prev_token.span;
this.psess.gated_spans.gate(sym::unsafe_attributes, unsafe_span);
this.expect(&token::OpenDelim(Delimiter::Parenthesis))?;
ast::Safety::Unsafe(unsafe_span)
} else {
@ -406,7 +405,6 @@ impl<'a> Parser<'a> {
};
let unsafety = if is_unsafe {
let unsafe_span = self.prev_token.span;
self.psess.gated_spans.gate(sym::unsafe_attributes, unsafe_span);
self.expect(&token::OpenDelim(Delimiter::Parenthesis))?;
ast::Safety::Unsafe(unsafe_span)

40
compiler/rustc_parse/src/validate_attr.rs
View File

@ -7,9 +7,7 @@ use rustc_ast::{
NestedMetaItem, Safety,
};
use rustc_errors::{Applicability, FatalError, PResult};
use rustc_feature::{
AttributeSafety, AttributeTemplate, BuiltinAttribute, Features, BUILTIN_ATTRIBUTE_MAP,
};
use rustc_feature::{AttributeSafety, AttributeTemplate, BuiltinAttribute, BUILTIN_ATTRIBUTE_MAP};
use rustc_session::errors::report_lit_error;
use rustc_session::lint::builtin::{ILL_FORMED_ATTRIBUTE_INPUT, UNSAFE_ATTR_OUTSIDE_UNSAFE};
use rustc_session::lint::BuiltinLintDiag;
@ -18,7 +16,7 @@ use rustc_span::{sym, BytePos, Span, Symbol};
use crate::{errors, parse_in};
pub fn check_attr(features: &Features, psess: &ParseSess, attr: &Attribute) {
pub fn check_attr(psess: &ParseSess, attr: &Attribute) {
if attr.is_doc_comment() {
return;
}
@ -28,7 +26,7 @@ pub fn check_attr(features: &Features, psess: &ParseSess, attr: &Attribute) {
// All non-builtin attributes are considered safe
let safety = attr_info.map(|x| x.safety).unwrap_or(AttributeSafety::Normal);
check_attribute_safety(features, psess, safety, attr);
check_attribute_safety(psess, safety, attr);
// Check input tokens for built-in and key-value attributes.
match attr_info {
@ -36,9 +34,9 @@ pub fn check_attr(features: &Features, psess: &ParseSess, attr: &Attribute) {
Some(BuiltinAttribute { name, template, .. }) if *name != sym::rustc_dummy => {
match parse_meta(psess, attr) {
// Don't check safety again, we just did that
Ok(meta) => check_builtin_meta_item(
features, psess, &meta, attr.style, *name, *template, false,
),
Ok(meta) => {
check_builtin_meta_item(psess, &meta, attr.style, *name, *template, false)
}
Err(err) => {
err.emit();
}
@ -157,16 +155,7 @@ fn is_attr_template_compatible(template: &AttributeTemplate, meta: &ast::MetaIte
}
}
pub fn check_attribute_safety(
features: &Features,
psess: &ParseSess,
safety: AttributeSafety,
attr: &Attribute,
) {
if !features.unsafe_attributes {
return;
}
pub fn check_attribute_safety(psess: &ParseSess, safety: AttributeSafety, attr: &Attribute) {
let attr_item = attr.get_normal_item();
if safety == AttributeSafety::Unsafe {
@ -215,21 +204,18 @@ pub fn check_attribute_safety(
// Called by `check_builtin_meta_item` and code that manually denies
// `unsafe(...)` in `cfg`
pub fn deny_builtin_meta_unsafety(features: &Features, psess: &ParseSess, meta: &MetaItem) {
pub fn deny_builtin_meta_unsafety(psess: &ParseSess, meta: &MetaItem) {
// This only supports denying unsafety right now - making builtin attributes
// support unsafety will requite us to thread the actual `Attribute` through
// for the nice diagnostics.
if features.unsafe_attributes {
if let Safety::Unsafe(unsafe_span) = meta.unsafety {
psess
.dcx()
.emit_err(errors::InvalidAttrUnsafe { span: unsafe_span, name: meta.path.clone() });
}
if let Safety::Unsafe(unsafe_span) = meta.unsafety {
psess
.dcx()
.emit_err(errors::InvalidAttrUnsafe { span: unsafe_span, name: meta.path.clone() });
}
}
pub fn check_builtin_meta_item(
features: &Features,
psess: &ParseSess,
meta: &MetaItem,
style: ast::AttrStyle,
@ -246,7 +232,7 @@ pub fn check_builtin_meta_item(
}
if deny_unsafety {
deny_builtin_meta_unsafety(features, psess, meta);
deny_builtin_meta_unsafety(psess, meta);
}
}

1
src/tools/rustfmt/tests/target/unsafe_attributes.rs
View File

@ -1,4 +1,3 @@
#![feature(unsafe_attributes)]
// https://github.com/rust-lang/rust/issues/123757
//
#![simple_ident]

1
tests/ui/attributes/unsafe/cfg-unsafe-attributes.rs
View File

@ -1,5 +1,4 @@
//@ build-pass
#![feature(unsafe_attributes)]
#[cfg_attr(all(), unsafe(no_mangle))]
fn a() {}

2
tests/ui/attributes/unsafe/derive-unsafe-attributes.rs
View File

@ -1,5 +1,3 @@
#![feature(unsafe_attributes)]
#[derive(unsafe(Debug))]
//~^ ERROR: expected identifier, found keyword `unsafe`
//~| ERROR: traits in `#[derive(...)]` don't accept arguments

14
tests/ui/attributes/unsafe/derive-unsafe-attributes.stderr
View File

@ -1,5 +1,5 @@
error: expected identifier, found keyword `unsafe`
--> $DIR/derive-unsafe-attributes.rs:3:10
--> $DIR/derive-unsafe-attributes.rs:1:10
|
LL | #[derive(unsafe(Debug))]
| ^^^^^^ expected identifier, found keyword
@ -10,13 +10,13 @@ LL | #[derive(r#unsafe(Debug))]
| ++
error: traits in `#[derive(...)]` don't accept arguments
--> $DIR/derive-unsafe-attributes.rs:3:16
--> $DIR/derive-unsafe-attributes.rs:1:16
|
LL | #[derive(unsafe(Debug))]
| ^^^^^^^ help: remove the arguments
error: `derive` is not an unsafe attribute
--> $DIR/derive-unsafe-attributes.rs:12:3
--> $DIR/derive-unsafe-attributes.rs:10:3
|
LL | #[unsafe(derive(Debug))]
| ^^^^^^ this is not an unsafe attribute
@ -24,7 +24,7 @@ LL | #[unsafe(derive(Debug))]
= note: extraneous unsafe is not allowed in attributes
error: expected identifier, found keyword `unsafe`
--> $DIR/derive-unsafe-attributes.rs:3:10
--> $DIR/derive-unsafe-attributes.rs:1:10
|
LL | #[derive(unsafe(Debug))]
| ^^^^^^ expected identifier, found keyword
@ -36,7 +36,7 @@ LL | #[derive(r#unsafe(Debug))]
| ++
error: expected identifier, found keyword `unsafe`
--> $DIR/derive-unsafe-attributes.rs:3:10
--> $DIR/derive-unsafe-attributes.rs:1:10
|
LL | #[derive(unsafe(Debug))]
| ^^^^^^ expected identifier, found keyword
@ -48,13 +48,13 @@ LL | #[derive(r#unsafe(Debug))]
| ++
error: cannot find derive macro `r#unsafe` in this scope
--> $DIR/derive-unsafe-attributes.rs:3:10
--> $DIR/derive-unsafe-attributes.rs:1:10
|
LL | #[derive(unsafe(Debug))]
| ^^^^^^
error: cannot find derive macro `r#unsafe` in this scope
--> $DIR/derive-unsafe-attributes.rs:3:10
--> $DIR/derive-unsafe-attributes.rs:1:10
|
LL | #[derive(unsafe(Debug))]
| ^^^^^^

2
tests/ui/attributes/unsafe/double-unsafe-attributes.rs
View File

@ -1,5 +1,3 @@
#![feature(unsafe_attributes)]
#[unsafe(unsafe(no_mangle))]
//~^ ERROR expected identifier, found keyword `unsafe`
//~| ERROR cannot find attribute `r#unsafe` in this scope

6
tests/ui/attributes/unsafe/double-unsafe-attributes.stderr
View File

@ -1,5 +1,5 @@
error: expected identifier, found keyword `unsafe`
--> $DIR/double-unsafe-attributes.rs:3:10
--> $DIR/double-unsafe-attributes.rs:1:10
|
LL | #[unsafe(unsafe(no_mangle))]
| ^^^^^^ expected identifier, found keyword
@ -10,7 +10,7 @@ LL | #[unsafe(r#unsafe(no_mangle))]
| ++
error: `r#unsafe` is not an unsafe attribute
--> $DIR/double-unsafe-attributes.rs:3:3
--> $DIR/double-unsafe-attributes.rs:1:3
|
LL | #[unsafe(unsafe(no_mangle))]
| ^^^^^^ this is not an unsafe attribute
@ -18,7 +18,7 @@ LL | #[unsafe(unsafe(no_mangle))]
= note: extraneous unsafe is not allowed in attributes
error: cannot find attribute `r#unsafe` in this scope
--> $DIR/double-unsafe-attributes.rs:3:10
--> $DIR/double-unsafe-attributes.rs:1:10
|
LL | #[unsafe(unsafe(no_mangle))]
| ^^^^^^

1
tests/ui/attributes/unsafe/extraneous-unsafe-attributes.rs
View File

@ -1,6 +1,5 @@
//@ edition: 2024
//@ compile-flags: -Zunstable-options
#![feature(unsafe_attributes)]
#[unsafe(cfg(any()))] //~ ERROR: is not an unsafe attribute
fn a() {}

16
tests/ui/attributes/unsafe/extraneous-unsafe-attributes.stderr
View File

@ -1,5 +1,5 @@
error: `cfg` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:5:3
--> $DIR/extraneous-unsafe-attributes.rs:4:3
|
LL | #[unsafe(cfg(any()))]
| ^^^^^^ this is not an unsafe attribute
@ -7,7 +7,7 @@ LL | #[unsafe(cfg(any()))]
= note: extraneous unsafe is not allowed in attributes
error: `cfg_attr` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:8:3
--> $DIR/extraneous-unsafe-attributes.rs:7:3
|
LL | #[unsafe(cfg_attr(any(), allow(dead_code)))]
| ^^^^^^ this is not an unsafe attribute
@ -15,7 +15,7 @@ LL | #[unsafe(cfg_attr(any(), allow(dead_code)))]
= note: extraneous unsafe is not allowed in attributes
error: `test` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:11:3
--> $DIR/extraneous-unsafe-attributes.rs:10:3
|
LL | #[unsafe(test)]
| ^^^^^^ this is not an unsafe attribute
@ -23,7 +23,7 @@ LL | #[unsafe(test)]
= note: extraneous unsafe is not allowed in attributes
error: `ignore` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:14:3
--> $DIR/extraneous-unsafe-attributes.rs:13:3
|
LL | #[unsafe(ignore = "test")]
| ^^^^^^ this is not an unsafe attribute
@ -31,7 +31,7 @@ LL | #[unsafe(ignore = "test")]
= note: extraneous unsafe is not allowed in attributes
error: `should_panic` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:17:3
--> $DIR/extraneous-unsafe-attributes.rs:16:3
|
LL | #[unsafe(should_panic(expected = "test"))]
| ^^^^^^ this is not an unsafe attribute
@ -39,7 +39,7 @@ LL | #[unsafe(should_panic(expected = "test"))]
= note: extraneous unsafe is not allowed in attributes
error: `macro_use` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:20:3
--> $DIR/extraneous-unsafe-attributes.rs:19:3
|
LL | #[unsafe(macro_use)]
| ^^^^^^ this is not an unsafe attribute
@ -47,7 +47,7 @@ LL | #[unsafe(macro_use)]
= note: extraneous unsafe is not allowed in attributes
error: `macro_export` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:22:7
--> $DIR/extraneous-unsafe-attributes.rs:21:7
|
LL | #[unsafe(macro_export)]
| ^^^^^^ this is not an unsafe attribute
@ -55,7 +55,7 @@ LL | #[unsafe(macro_export)]
= note: extraneous unsafe is not allowed in attributes
error: `used` is not an unsafe attribute
--> $DIR/extraneous-unsafe-attributes.rs:28:3
--> $DIR/extraneous-unsafe-attributes.rs:27:3
|
LL | #[unsafe(used)]
| ^^^^^^ this is not an unsafe attribute

2
tests/ui/attributes/unsafe/proc-unsafe-attributes.rs
View File

@ -1,5 +1,3 @@
#![feature(unsafe_attributes)]
#[unsafe(proc_macro)]
//~^ ERROR: is not an unsafe attribute
//~| ERROR attribute is only usable with crates of the `proc-macro` crate type

30
tests/ui/attributes/unsafe/proc-unsafe-attributes.stderr
View File

@ -1,11 +1,11 @@
error[E0452]: malformed lint attribute input
--> $DIR/proc-unsafe-attributes.rs:28:16
--> $DIR/proc-unsafe-attributes.rs:26:16
|
LL | #[unsafe(allow(unsafe(dead_code)))]
| ^^^^^^^^^^^^^^^^^ bad attribute argument
error[E0452]: malformed lint attribute input
--> $DIR/proc-unsafe-attributes.rs:28:16
--> $DIR/proc-unsafe-attributes.rs:26:16
|
LL | #[unsafe(allow(unsafe(dead_code)))]
| ^^^^^^^^^^^^^^^^^ bad attribute argument
@ -13,7 +13,7 @@ LL | #[unsafe(allow(unsafe(dead_code)))]
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `proc_macro` is not an unsafe attribute
--> $DIR/proc-unsafe-attributes.rs:3:3
--> $DIR/proc-unsafe-attributes.rs:1:3
|
LL | #[unsafe(proc_macro)]
| ^^^^^^ this is not an unsafe attribute
@ -21,7 +21,7 @@ LL | #[unsafe(proc_macro)]
= note: extraneous unsafe is not allowed in attributes
error: `proc_macro_derive` is not an unsafe attribute
--> $DIR/proc-unsafe-attributes.rs:9:3
--> $DIR/proc-unsafe-attributes.rs:7:3
|
LL | #[unsafe(proc_macro_derive(Foo))]
| ^^^^^^ this is not an unsafe attribute
@ -29,7 +29,7 @@ LL | #[unsafe(proc_macro_derive(Foo))]
= note: extraneous unsafe is not allowed in attributes
error: expected identifier, found keyword `unsafe`
--> $DIR/proc-unsafe-attributes.rs:14:21
--> $DIR/proc-unsafe-attributes.rs:12:21
|
LL | #[proc_macro_derive(unsafe(Foo))]
| ^^^^^^ expected identifier, found keyword
@ -40,7 +40,7 @@ LL | #[proc_macro_derive(r#unsafe(Foo))]
| ++
error: `proc_macro_attribute` is not an unsafe attribute
--> $DIR/proc-unsafe-attributes.rs:19:3
--> $DIR/proc-unsafe-attributes.rs:17:3
|
LL | #[unsafe(proc_macro_attribute)]
| ^^^^^^ this is not an unsafe attribute
@ -48,7 +48,7 @@ LL | #[unsafe(proc_macro_attribute)]
= note: extraneous unsafe is not allowed in attributes
error: `allow` is not an unsafe attribute
--> $DIR/proc-unsafe-attributes.rs:24:3
--> $DIR/proc-unsafe-attributes.rs:22:3
|
LL | #[unsafe(allow(dead_code))]
| ^^^^^^ this is not an unsafe attribute
@ -56,7 +56,7 @@ LL | #[unsafe(allow(dead_code))]
= note: extraneous unsafe is not allowed in attributes
error: `allow` is not an unsafe attribute
--> $DIR/proc-unsafe-attributes.rs:28:3
--> $DIR/proc-unsafe-attributes.rs:26:3
|
LL | #[unsafe(allow(unsafe(dead_code)))]
| ^^^^^^ this is not an unsafe attribute
@ -64,7 +64,7 @@ LL | #[unsafe(allow(unsafe(dead_code)))]
= note: extraneous unsafe is not allowed in attributes
error: expected identifier, found keyword `unsafe`
--> $DIR/proc-unsafe-attributes.rs:28:16
--> $DIR/proc-unsafe-attributes.rs:26:16
|
LL | #[unsafe(allow(unsafe(dead_code)))]
| ^^^^^^ expected identifier, found keyword
@ -75,31 +75,31 @@ LL | #[unsafe(allow(r#unsafe(dead_code)))]
| ++
error: the `#[proc_macro]` attribute is only usable with crates of the `proc-macro` crate type
--> $DIR/proc-unsafe-attributes.rs:3:1
--> $DIR/proc-unsafe-attributes.rs:1:1
|
LL | #[unsafe(proc_macro)]
| ^^^^^^^^^^^^^^^^^^^^^
error: the `#[proc_macro_derive]` attribute is only usable with crates of the `proc-macro` crate type
--> $DIR/proc-unsafe-attributes.rs:9:1
--> $DIR/proc-unsafe-attributes.rs:7:1
|
LL | #[unsafe(proc_macro_derive(Foo))]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: the `#[proc_macro_derive]` attribute is only usable with crates of the `proc-macro` crate type
--> $DIR/proc-unsafe-attributes.rs:14:1
--> $DIR/proc-unsafe-attributes.rs:12:1
|
LL | #[proc_macro_derive(unsafe(Foo))]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: the `#[proc_macro_attribute]` attribute is only usable with crates of the `proc-macro` crate type
--> $DIR/proc-unsafe-attributes.rs:19:1
--> $DIR/proc-unsafe-attributes.rs:17:1
|
LL | #[unsafe(proc_macro_attribute)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0452]: malformed lint attribute input
--> $DIR/proc-unsafe-attributes.rs:28:16
--> $DIR/proc-unsafe-attributes.rs:26:16
|
LL | #[unsafe(allow(unsafe(dead_code)))]
| ^^^^^^^^^^^^^^^^^ bad attribute argument
@ -107,7 +107,7 @@ LL | #[unsafe(allow(unsafe(dead_code)))]
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0452]: malformed lint attribute input
--> $DIR/proc-unsafe-attributes.rs:28:16
--> $DIR/proc-unsafe-attributes.rs:26:16
|
LL | #[unsafe(allow(unsafe(dead_code)))]
| ^^^^^^^^^^^^^^^^^ bad attribute argument

1
tests/ui/attributes/unsafe/unsafe-attributes.rs
View File

@ -1,5 +1,4 @@
//@ build-pass
#![feature(unsafe_attributes)]
#[unsafe(no_mangle)]
fn a() {}

2
tests/ui/attributes/unsafe/unsafe-safe-attribute.rs
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@ -1,5 +1,3 @@
#![feature(unsafe_attributes)]
#[unsafe(repr(C))] //~ ERROR: is not an unsafe attribute
struct Foo {}

2
tests/ui/attributes/unsafe/unsafe-safe-attribute.stderr
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@ -1,5 +1,5 @@
error: `repr` is not an unsafe attribute
--> $DIR/unsafe-safe-attribute.rs:3:3
--> $DIR/unsafe-safe-attribute.rs:1:3
|
LL | #[unsafe(repr(C))]
| ^^^^^^ this is not an unsafe attribute

2
tests/ui/attributes/unsafe/unsafe-safe-attribute_diagnostic.rs
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@ -1,5 +1,3 @@
#![feature(unsafe_attributes)]
#[unsafe(diagnostic::on_unimplemented( //~ ERROR: is not an unsafe attribute
message = "testing",
))]

2
tests/ui/attributes/unsafe/unsafe-safe-attribute_diagnostic.stderr
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@ -1,5 +1,5 @@
error: `diagnostic::on_unimplemented` is not an unsafe attribute
--> $DIR/unsafe-safe-attribute_diagnostic.rs:3:3
--> $DIR/unsafe-safe-attribute_diagnostic.rs:1:3
|
LL | #[unsafe(diagnostic::on_unimplemented(
| ^^^^^^ this is not an unsafe attribute

8
tests/ui/feature-gates/feature-gate-unsafe-attributes.rs
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@ -1,8 +0,0 @@
#[unsafe(no_mangle)] //~ ERROR [E0658]
extern "C" fn foo() {
}
fn main() {
foo();
}

13
tests/ui/feature-gates/feature-gate-unsafe-attributes.stderr
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@ -1,13 +0,0 @@
error[E0658]: `#[unsafe()]` markers for attributes are experimental
--> $DIR/feature-gate-unsafe-attributes.rs:1:3
|
LL | #[unsafe(no_mangle)]
| ^^^^^^
|
= note: see issue #123757 <https://github.com/rust-lang/rust/issues/123757> for more information
= help: add `#![feature(unsafe_attributes)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0658`.

1
tests/ui/rust-2024/unsafe-attributes/in_2024_compatibility.rs
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@ -1,5 +1,4 @@
#![deny(rust_2024_compatibility)]
#![feature(unsafe_attributes)]
#[no_mangle]
//~^ ERROR: unsafe attribute used without unsafe

2
tests/ui/rust-2024/unsafe-attributes/in_2024_compatibility.stderr
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@ -1,5 +1,5 @@
error: unsafe attribute used without unsafe
--> $DIR/in_2024_compatibility.rs:4:3
--> $DIR/in_2024_compatibility.rs:3:3
|
LL | #[no_mangle]
| ^^^^^^^^^ usage of unsafe attribute

1
tests/ui/rust-2024/unsafe-attributes/unsafe-attribute-marked.rs
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@ -4,7 +4,6 @@
//@[edition2024] compile-flags: -Zunstable-options
//@ check-pass
#![feature(unsafe_attributes)]
#[unsafe(no_mangle)]
extern "C" fn foo() {}

1
tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-fix.fixed
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@ -1,5 +1,4 @@
//@ run-rustfix
#![feature(unsafe_attributes)]
#![deny(unsafe_attr_outside_unsafe)]
macro_rules! tt {

1
tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-fix.rs
View File

@ -1,5 +1,4 @@
//@ run-rustfix
#![feature(unsafe_attributes)]
#![deny(unsafe_attr_outside_unsafe)]
macro_rules! tt {

14
tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-fix.stderr
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@ -1,5 +1,5 @@
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes-fix.rs:44:6
--> $DIR/unsafe-attributes-fix.rs:43:6
|
LL | tt!([no_mangle]);
| ^^^^^^^^^ usage of unsafe attribute
@ -7,7 +7,7 @@ LL | tt!([no_mangle]);
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2024!
= note: for more information, see issue #123757 <https://github.com/rust-lang/rust/issues/123757>
note: the lint level is defined here
--> $DIR/unsafe-attributes-fix.rs:3:9
--> $DIR/unsafe-attributes-fix.rs:2:9
|
LL | #![deny(unsafe_attr_outside_unsafe)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -17,7 +17,7 @@ LL | tt!([unsafe(no_mangle)]);
| +++++++ +
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes-fix.rs:14:11
--> $DIR/unsafe-attributes-fix.rs:13:11
|
LL | #[$e]
| ^^ usage of unsafe attribute
@ -34,7 +34,7 @@ LL | #[unsafe($e)]
| +++++++ +
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes-fix.rs:48:7
--> $DIR/unsafe-attributes-fix.rs:47:7
|
LL | meta!(no_mangle);
| ^^^^^^^^^ usage of unsafe attribute
@ -47,7 +47,7 @@ LL | meta!(unsafe(no_mangle));
| +++++++ +
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes-fix.rs:51:8
--> $DIR/unsafe-attributes-fix.rs:50:8
|
LL | meta2!(export_name = "baw");
| ^^^^^^^^^^^ usage of unsafe attribute
@ -60,7 +60,7 @@ LL | meta2!(unsafe(export_name = "baw"));
| +++++++ +
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes-fix.rs:23:11
--> $DIR/unsafe-attributes-fix.rs:22:11
|
LL | #[$e = $l]
| ^^ usage of unsafe attribute
@ -77,7 +77,7 @@ LL | #[unsafe($e = $l)]
| +++++++ +
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes-fix.rs:56:3
--> $DIR/unsafe-attributes-fix.rs:55:3
|
LL | #[no_mangle]
| ^^^^^^^^^ usage of unsafe attribute

2
tests/ui/rust-2024/unsafe-attributes/unsafe-attributes.edition2024.stderr
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@ -1,5 +1,5 @@
error: unsafe attribute used without unsafe
--> $DIR/unsafe-attributes.rs:9:3
--> $DIR/unsafe-attributes.rs:8:3
|
LL | #[no_mangle]
| ^^^^^^^^^ usage of unsafe attribute

1
tests/ui/rust-2024/unsafe-attributes/unsafe-attributes.rs
View File

@ -4,7 +4,6 @@
//@[edition2024] edition:2024
//@[edition2024] compile-flags: -Zunstable-options
#![feature(unsafe_attributes)]
#[no_mangle] //[edition2024]~ ERROR: unsafe attribute used without unsafe
extern "C" fn foo() {}