1 error[E0576]: cannot find associated type `X` in trait `A`
2 --> $DIR/issue-22037.rs:3:33
5 | ------------ associated type `Output` defined here
6 LL | fn a(&self) -> <Self as A>::X;
10 | help: maybe you meant this associated type: `Output`
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0576`.