Improve unsafe extern blocks diagnostics #127106
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spastorino force-pushed the improve-unsafe-extern-blocks-diagnostics branch from b18f6c6 to 15d5dac Compare 
compiler-errors approved these changes Jun 29, 2024
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bors added S-waiting-on-bors matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Jun 29, 2024
…locks-diagnostics, r=compiler-errors Improve unsafe extern blocks diagnostics Closes rust-lang#126327 For this code: ```rust extern { pub fn foo(); pub safe fn bar(); } ``` We get ... ``` error: items in unadorned `extern` blocks cannot have safety qualifiers --> test.rs:3:5 | 3 | pub safe fn bar(); | ^^^^^^^^^^^^^^^^^^ | help: add unsafe to this `extern` block | 1 | unsafe extern { | ++++++ error[E0658]: `unsafe extern {}` blocks and `safe` keyword are experimental --> test.rs:3:9 | 3 | pub safe fn bar(); | ^^^^ | = note: see issue rust-lang#123743 <rust-lang#123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0658`. ``` And then making the extern block unsafe, we get ... ``` error: extern block cannot be declared unsafe --> test.rs:1:1 | 1 | unsafe extern { | ^^^^^^ | = note: see issue rust-lang#123743 <rust-lang#123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable error: items in unadorned `extern` blocks cannot have safety qualifiers --> test.rs:3:5 | 3 | pub safe fn bar(); | ^^^^^^^^^^^^^^^^^^ error[E0658]: `unsafe extern {}` blocks and `safe` keyword are experimental --> test.rs:3:9 | 3 | pub safe fn bar(); | ^^^^ | = note: see issue rust-lang#123743 <rust-lang#123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0658`. ``` r? `@compiler-errors`
bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 29, 2024
…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#123237 (Various rustc_codegen_ssa cleanups) - rust-lang#126960 (Improve error message in tidy) - rust-lang#127002 (Implement `x perf` as a separate tool) - rust-lang#127050 (Make mtime of reproducible tarballs dependent on git commit) - rust-lang#127081 (Add a run-make test that LLD is not being used by default on the x64 beta/stable channel) - rust-lang#127106 (Improve unsafe extern blocks diagnostics) - rust-lang#127110 (Fix a error suggestion for E0121 when using placeholder _ as return types on function signature.) - rust-lang#127114 (fix: prefer `(*p).clone` to `p.clone` if the `p` is a raw pointer) - rust-lang#127118 (Show `used attribute`'s kind for user when find it isn't applied to a `static` variable.) r? `@ghost` `@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 29, 2024
…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#123237 (Various rustc_codegen_ssa cleanups) - rust-lang#126960 (Improve error message in tidy) - rust-lang#127002 (Implement `x perf` as a separate tool) - rust-lang#127081 (Add a run-make test that LLD is not being used by default on the x64 beta/stable channel) - rust-lang#127106 (Improve unsafe extern blocks diagnostics) - rust-lang#127110 (Fix a error suggestion for E0121 when using placeholder _ as return types on function signature.) - rust-lang#127114 (fix: prefer `(*p).clone` to `p.clone` if the `p` is a raw pointer) - rust-lang#127118 (Show `used attribute`'s kind for user when find it isn't applied to a `static` variable.) - rust-lang#127122 (Remove uneccessary condition in `div_ceil`) r? `@ghost` `@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 30, 2024
…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#123237 (Various rustc_codegen_ssa cleanups) - rust-lang#126960 (Improve error message in tidy) - rust-lang#127002 (Implement `x perf` as a separate tool) - rust-lang#127081 (Add a run-make test that LLD is not being used by default on the x64 beta/stable channel) - rust-lang#127106 (Improve unsafe extern blocks diagnostics) - rust-lang#127110 (Fix a error suggestion for E0121 when using placeholder _ as return types on function signature.) - rust-lang#127114 (fix: prefer `(*p).clone` to `p.clone` if the `p` is a raw pointer) - rust-lang#127118 (Show `used attribute`'s kind for user when find it isn't applied to a `static` variable.) - rust-lang#127122 (Remove uneccessary condition in `div_ceil`) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Jun 30, 2024
Rollup merge of rust-lang#127106 - spastorino:improve-unsafe-extern-blocks-diagnostics, r=compiler-errors Improve unsafe extern blocks diagnostics Closes rust-lang#126327 For this code: ```rust extern { pub fn foo(); pub safe fn bar(); } ``` We get ... ``` error: items in unadorned `extern` blocks cannot have safety qualifiers --> test.rs:3:5 | 3 | pub safe fn bar(); | ^^^^^^^^^^^^^^^^^^ | help: add unsafe to this `extern` block | 1 | unsafe extern { | ++++++ error[E0658]: `unsafe extern {}` blocks and `safe` keyword are experimental --> test.rs:3:9 | 3 | pub safe fn bar(); | ^^^^ | = note: see issue rust-lang#123743 <rust-lang#123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0658`. ``` And then making the extern block unsafe, we get ... ``` error: extern block cannot be declared unsafe --> test.rs:1:1 | 1 | unsafe extern { | ^^^^^^ | = note: see issue rust-lang#123743 <rust-lang#123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable error: items in unadorned `extern` blocks cannot have safety qualifiers --> test.rs:3:5 | 3 | pub safe fn bar(); | ^^^^^^^^^^^^^^^^^^ error[E0658]: `unsafe extern {}` blocks and `safe` keyword are experimental --> test.rs:3:9 | 3 | pub safe fn bar(); | ^^^^ | = note: see issue rust-lang#123743 <rust-lang#123743> for more information = help: add `#![feature(unsafe_extern_blocks)]` to the crate attributes to enable error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0658`. ``` r? ``@compiler-errors``
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Closes #126327
For this code:
We get ...
And then making the extern block unsafe, we get ...
r? @compiler-errors