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[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> exercises/08_futures/06_async_aware_primitives/src/lib.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |         if let msg = receiver.recv().await.unwrap() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in an async function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> exercises/08_futures/03_runtime/src/lib.rs:19:45
[INFO] [stdout]    |
[INFO] [stdout] 13 | / {
[INFO] [stdout] 14 | |     let reply = Arc::new(reply);
[INFO] [stdout] 15 | |
[INFO] [stdout] 16 | |     loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 19 | |                 let (mut stream, _) = result?;
[INFO] [stdout]    | |                                             ^ cannot use the `?` operator in an async function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in an async function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> exercises/08_futures/03_runtime/src/lib.rs:29:45
[INFO] [stdout]    |
[INFO] [stdout] 13 | / {
[INFO] [stdout] 14 | |     let reply = Arc::new(reply);
[INFO] [stdout] 15 | |
[INFO] [stdout] 16 | |     loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 29 | |                 let (mut stream, _) = result?;
[INFO] [stdout]    | |                                             ^ cannot use the `?` operator in an async function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runtime` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
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