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Only generate closure def id for async fns with body

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This commit is contained in:
Michael Goulet 2022-09-24 18:53:53 +00:00
parent f5193a9fcc
commit 730ead8047
2 changed files with 17 additions and 3 deletions
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8
compiler/rustc_resolve/src/def_collector.rs
View File

@ -1,6 +1,5 @@
use crate::{ImplTraitContext, Resolver};
use rustc_ast::visit::{self, FnKind};
use rustc_ast::walk_list;
use rustc_ast::*;
use rustc_expand::expand::AstFragment;
use rustc_hir::def_id::LocalDefId;
@ -148,8 +147,13 @@ impl<'a, 'b> visit::Visitor<'a> for DefCollector<'a, 'b> {
self.with_parent(return_impl_trait_id, |this| {
this.visit_fn_ret_ty(&sig.decl.output)
});
// If this async fn has no body (i.e. it's an async fn signature in a trait)
// then the closure_def will never be used, and we should avoid generating a
// def-id for it.
if let Some(body) = body {
let closure_def = self.create_def(closure_id, DefPathData::ClosureExpr, span);
self.with_parent(closure_def, |this| walk_list!(this, visit_block, body));
self.with_parent(closure_def, |this| this.visit_block(body));
}
return;
}
}

10
src/test/ui/async-await/in-trait/issue-102219.rs Normal file
View File

@ -0,0 +1,10 @@
// compile-flags:--crate-type=lib
// edition:2021
// check-pass
#![feature(async_fn_in_trait)]
#![allow(incomplete_features)]
trait T {
async fn foo();
}