error[E0584]: found a documentation comment that doesn't document anything --> $DIR/doc-inside-trait-item.rs:3:5 | LL | /// empty doc | ^^^^^^^^^^^^^ this doc comment doesn't document anything | = help: doc comments must come before what they document, if a comment was intended use `//` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0584`.