1 error[E0224]: at least one trait is required for an object type
2 --> $DIR/issue-65673.rs:9:16
4 LL | trait Alias<T> = where T: Trait;
5 | -------------- this alias does not contain a trait
7 LL | type Ctx = dyn Alias<T>;
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0224`.