[INFO] cloning repository https://github.com/zo-el/tokio-async-workshop
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f37f5163fe0f241022530131180c50bbc102a42
[INFO] testing zo-el/tokio-async-workshop against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzo-el%2Ftokio-async-workshop" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
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[INFO] [stderr]    Compiling client v0.0.0 (/opt/rustwide/workdir/client)
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> client/src/../solutions/client.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub async fn run_client(user: String, mut stream: TcpStream) -> Result<(), Error> {
[INFO] [stdout]    |                                       ----^^^^^^
[INFO] [stdout]    |                                       |
[INFO] [stdout]    |                                       help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in an async block that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> client/src/main.rs:31:48
[INFO] [stdout]    |
[INFO] [stdout] 25 | #[tokio::main]
[INFO] [stdout]    | -------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 31 |     let conn = TcpStream::connect(server).await?;
[INFO] [stdout]    |                                                ^ cannot use the `?` operator in an async block that returns `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> client/src/main.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | #[tokio::main]
[INFO] [stdout]    | ^^^^^^^^^^^^^^ expected `Result<(), Box<dyn Error>>`, found `()`
[INFO] [stdout] 26 | async fn main() -> Result<(), client::Error> {
[INFO] [stdout]    |                    ------------------------- expected `Result<(), Box<(dyn std::error::Error + 'static)>>` because of return type
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Result<(), Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout]    = note: this error originates in the attribute macro `tokio::main` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `client` (bin "client") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
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[INFO] [stdout] a29895dc4c796fad624b5c88e418ae3f9b58fe35cc980a34d65f4a7cac3b7b38
