1 error[E0277]: the trait bound `(): std::convert::From<std::option::NoneError>` is not satisfied
2 --> $DIR/try-on-option.rs:17:5
4 LL | x?; //~ the trait bound
5 | ^^ the trait `std::convert::From<std::option::NoneError>` is not implemented for `()`
7 = note: required by `std::convert::From::from`
9 error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
10 --> $DIR/try-on-option.rs:23:5
12 LL | x?; //~ the `?` operator
13 | ^^ cannot use the `?` operator in a function that returns `u32`
15 = help: the trait `std::ops::Try` is not implemented for `u32`
16 = note: required by `std::ops::Try::from_error`
18 error: aborting due to 2 previous errors
20 For more information about this error, try `rustc --explain E0277`.