1 error[E0277]: `()` doesn't implement `std::fmt::Display`
2 --> $DIR/issue-81098.rs:3:13
4 LL | fn wat() -> impl core::fmt::Display {
5 | ^^^^^^^^^^^^^^^^^^^^^^^ `()` cannot be formatted with the default formatter
7 = help: the trait `std::fmt::Display` is not implemented for `()`
8 = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
10 error[E0277]: `()` doesn't implement `std::fmt::Display`
11 --> $DIR/issue-81098.rs:9:12
13 LL | fn ok() -> impl core::fmt::Display {
14 | ^^^^^^^^^^^^^^^^^^^^^^^ `()` cannot be formatted with the default formatter
16 | -- help: remove this semicolon
18 | this expression has type `{integer}`, which implements `std::fmt::Display`
20 = help: the trait `std::fmt::Display` is not implemented for `()`
21 = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
23 error: aborting due to 2 previous errors
25 For more information about this error, try `rustc --explain E0277`.