error[E0277]: the trait bound `!: ImplementedForUnitButNotNever` is not satisfied --> $DIR/defaulted-never-note.rs:26:5 | LL | foo(_x); | ^^^ the trait `ImplementedForUnitButNotNever` is not implemented for `!` | = note: the trait is implemented for `()`. Possibly this error has been caused by changes to Rust's type-inference algorithm (see: https://github.com/rust-lang/rust/issues/48950 for more info). Consider whether you meant to use the type `()` here instead. note: required by `foo` --> $DIR/defaulted-never-note.rs:21:1 | LL | fn foo(_t: T) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.