internal compiler error: expected NodeId to be lowered already for res Local... · Issue #69401 · rust-lang/rust (original) (raw)

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Description

I'm seeing an internal compiler error on the following input (found by fuzz-rustc):

struct Inv<'a> { x: &'a u8 } pub trait Foo { fn no_bound(b: Inv<(b)>); }

$ rustc main.rs
error[E0573]: expected type, found local variable `b`
 --> main.rs:5:25
  |
5 |     fn no_bound(b: Inv<(b)>);
  |                         ^ not a type

thread 'rustc' panicked at 'expected `NodeId` to be lowered already for res Local(
    NodeId(21),
)', src/librustc_ast_lowering/lib.rs:662:17
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: internal compiler error: unexpected panic

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 1.43.0-nightly (5d04ce67f 2020-02-13) running on x86_64-unknown-linux-gnu

error: aborting due to previous error

For more information about this error, try `rustc --explain E0573`.