| error[E0277]: the `?` operator can only be applied to values that implement `Try` |
| --> $DIR/try-in-sync.rs:6:5 |
| | |
| LL | foo()?; |
| | ^^^^^^ the `?` operator cannot be applied to type `impl Future<Output = Result<(), ()>>` |
| | |
| = help: the nightly-only, unstable trait `Try` is not implemented for `impl Future<Output = Result<(), ()>>` |
| note: this implements `Future` and its output type supports `?`, but the future cannot be awaited in a synchronous function |
| --> $DIR/try-in-sync.rs:6:10 |
| | |
| LL | fn main() -> Result<(), ()> { |
| | --------------------------- this is not `async` |
| LL | foo()?; |
| | ^ |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
