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Make multiple_unsafe_ops_per_block ignore await desugaring

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The await desugaring contains two calls (`Poll::new_unchecked` and
`get_context`) inside a single unsafe block. That violates the lint.
This commit is contained in:
Nilstrieb 2023-10-08 21:52:16 +02:00
parent 33f49f33d6
commit 6ed04af81c
2 changed files with 12 additions and 2 deletions
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7
clippy_lints/src/multiple_unsafe_ops_per_block.rs
View file

@ -9,7 +9,7 @@ use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::lint::in_external_macro;
use rustc_middle::ty;
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::Span;
use rustc_span::{DesugaringKind, Span};
declare_clippy_lint! {
/// ### What it does
@ -64,7 +64,10 @@ declare_lint_pass!(MultipleUnsafeOpsPerBlock => [MULTIPLE_UNSAFE_OPS_PER_BLOCK])
impl<'tcx> LateLintPass<'tcx> for MultipleUnsafeOpsPerBlock {
fn check_block(&mut self, cx: &LateContext<'tcx>, block: &'tcx hir::Block<'_>) {
if !matches!(block.rules, BlockCheckMode::UnsafeBlock(_)) || in_external_macro(cx.tcx.sess, block.span) {
if !matches!(block.rules, BlockCheckMode::UnsafeBlock(_))
|| in_external_macro(cx.tcx.sess, block.span)
|| block.span.is_desugaring(DesugaringKind::Await)
{
return;
}
let mut unsafe_ops = vec![];

7
tests/ui/multiple_unsafe_ops_per_block.rs
View file

@ -147,4 +147,11 @@ fn _field_fn_ptr(x: unsafe fn()) {
}
}
// await expands to an unsafe block with several operations, but this is fine.: #11312
async fn await_desugaring_silent() {
async fn helper() {}
helper().await;
}
fn main() {}