$ rustc --edition=2018 main.rs
error: free function without a body
--> main.rs:1:1
|
1 | async fn foo();
| ^^^^^^^^^^^^^^-
| |
| help: provide a definition for the function: `{ <body> }`
error: internal compiler error: src/librustc_middle/hir/map/mod.rs:177: local_def_id: no entry for `HirId { owner: DefId(0:3 ~ main[317d]::foo[0]), local_id: 8 }`, which has a map of `Some(Entry { parent: HirId { owner: DefId(0:3 ~ main[317d]::foo[0]), local_id: 14 }, node: Expr(Expr { hir_id: HirId { owner: DefId(0:3 ~ main[317d]::foo[0]), local_id: 8 }, kind: Closure(Value, FnDecl { inputs: [Ty { hir_id: HirId { owner: DefId(0:3 ~ main[317d]::foo[0]), local_id: 1 }, kind: Infer, span: main.rs:1:1: 1:16 }], output: DefaultReturn(main.rs:1:1: 1:16), c_variadic: false, implicit_self: None }, BodyId { hir_id: HirId { owner: DefId(0:3 ~ main[317d]::foo[0]), local_id: 7 } }, main.rs:1:1: 1:16, Some(Static)), attrs: ThinVec(None), span: main.rs:1:1: 1:16 }) })`
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:880:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.44.0-nightly (76b11980a 2020-04-01) running on x86_64-unknown-linux-gnu
error: aborting due to 2 previous errors
I'm seeing an internal compiler error on the following input (found by fuzz-rustc):