error[E0391]: cycle detected when computing type of `Foo::{opaque#0}`
  --> $DIR/reveal_local.rs:5:12
   |
LL | type Foo = impl Debug;
   |            ^^^^^^^^^^
   |
note: ...which requires type-checking `not_good`...
  --> $DIR/reveal_local.rs:11:1
   |
LL | fn not_good() {
   | ^^^^^^^^^^^^^
   = note: ...which again requires computing type of `Foo::{opaque#0}`, completing the cycle
note: cycle used when checking item types in top-level module
  --> $DIR/reveal_local.rs:1:1
   |
LL | / #![feature(type_alias_impl_trait)]
LL | |
LL | | use std::fmt::Debug;
LL | |
...  |
LL | |
LL | | fn main() {}
   | |____________^

error[E0391]: cycle detected when computing type of `Foo::{opaque#0}`
  --> $DIR/reveal_local.rs:5:12
   |
LL | type Foo = impl Debug;
   |            ^^^^^^^^^^
   |
note: ...which requires type-checking `not_gooder`...
  --> $DIR/reveal_local.rs:17:1
   |
LL | fn not_gooder() {
   | ^^^^^^^^^^^^^^^
   = note: ...which again requires computing type of `Foo::{opaque#0}`, completing the cycle
note: cycle used when checking item types in top-level module
  --> $DIR/reveal_local.rs:1:1
   |
LL | / #![feature(type_alias_impl_trait)]
LL | |
LL | | use std::fmt::Debug;
LL | |
...  |
LL | |
LL | | fn main() {}
   | |____________^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0391`.