error[E0277]: the trait bound `Result: From>` is not satisfied --> $DIR/issue-88696.rs:9:9 | LL | a().into() | ^^^^ the trait `From>` is not implemented for `Result` | = note: required for `Result` to implement `Into>` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.