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| author | Yuki Okushi <huyuumi.dev@gmail.com> | 2021-02-10 12:24:30 +0900 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-02-10 12:24:30 +0900 |
| commit | 2e8e591a16a2ced9715c4f93cd0c3b3fdf82b712 (patch) | |
| tree | fd4b9a8f4d3bb85d9d17587c975d424234115c6d | |
| parent | 40fa6fc43f1c78153ad2ea3feef2478cc0ce9102 (diff) | |
| parent | 4af417a78a1684e2c75b275ee3a0db8049ef8b0f (diff) | |
| download | rust-2e8e591a16a2ced9715c4f93cd0c3b3fdf82b712.tar.gz rust-2e8e591a16a2ced9715c4f93cd0c3b3fdf82b712.zip | |
Rollup merge of #81926 - henryboisdequin:fix-81907, r=estebank
add suggestion to use the `async_recursion` crate Closes #81907 CC `@estebank`
3 files changed, 6 insertions, 0 deletions
diff --git a/compiler/rustc_typeck/src/check/check.rs b/compiler/rustc_typeck/src/check/check.rs index 5f27355f0ba..114fe969edd 100644 --- a/compiler/rustc_typeck/src/check/check.rs +++ b/compiler/rustc_typeck/src/check/check.rs @@ -1505,6 +1505,9 @@ fn async_opaque_type_cycle_error(tcx: TyCtxt<'tcx>, span: Span) { struct_span_err!(tcx.sess, span, E0733, "recursion in an `async fn` requires boxing") .span_label(span, "recursive `async fn`") .note("a recursive `async fn` must be rewritten to return a boxed `dyn Future`") + .note( + "consider using the `async_recursion` crate: https://crates.io/crates/async_recursion", + ) .emit(); } diff --git a/src/test/ui/async-await/mutually-recursive-async-impl-trait-type.stderr b/src/test/ui/async-await/mutually-recursive-async-impl-trait-type.stderr index f6e4c8be292..f789ad2a05c 100644 --- a/src/test/ui/async-await/mutually-recursive-async-impl-trait-type.stderr +++ b/src/test/ui/async-await/mutually-recursive-async-impl-trait-type.stderr @@ -5,6 +5,7 @@ LL | async fn rec_1() { | ^ recursive `async fn` | = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future` + = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion error[E0733]: recursion in an `async fn` requires boxing --> $DIR/mutually-recursive-async-impl-trait-type.rs:9:18 @@ -13,6 +14,7 @@ LL | async fn rec_2() { | ^ recursive `async fn` | = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future` + = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion error: aborting due to 2 previous errors diff --git a/src/test/ui/async-await/recursive-async-impl-trait-type.stderr b/src/test/ui/async-await/recursive-async-impl-trait-type.stderr index 892d91e3a49..63f64f44557 100644 --- a/src/test/ui/async-await/recursive-async-impl-trait-type.stderr +++ b/src/test/ui/async-await/recursive-async-impl-trait-type.stderr @@ -5,6 +5,7 @@ LL | async fn recursive_async_function() -> () { | ^^ recursive `async fn` | = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future` + = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion error: aborting due to previous error |