[INFO] cloning repository https://github.com/mhashimm/100-exercises-to-learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mhashimm/100-exercises-to-learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmhashimm%2F100-exercises-to-learn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmhashimm%2F100-exercises-to-learn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8791feb495a96e11b84fe6445ced2c12fe5d549a
[INFO] testing mhashimm/100-exercises-to-learn-rust against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmhashimm%2F100-exercises-to-learn-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mhashimm/100-exercises-to-learn-rust
[INFO] finished tweaking git repo https://github.com/mhashimm/100-exercises-to-learn-rust
[INFO] tweaked toml for git repo https://github.com/mhashimm/100-exercises-to-learn-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mhashimm/100-exercises-to-learn-rust on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
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[INFO] crate git repo https://github.com/mhashimm/100-exercises-to-learn-rust already has a lockfile, it will not be regenerated
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[INFO] [stdout] 90b4bbfda17e42dc0c60891d30c38b03bf0bd37901c909cab182d3e5b89860fe
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[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling async_fn v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/01_async_fn)
[INFO] [stdout] warning: unused variable: `listener`
[INFO] [stdout]   --> exercises/08_futures/01_async_fn/src/lib.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub async fn echo(listener: TcpListener) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_listener`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling spawn v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/02_spawn)
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]  --> exercises/08_futures/02_spawn/src/lib.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub async fn echoes(first: TcpListener, second: TcpListener) -> Result<(), anyhow::Error> {
[INFO] [stdout]   |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]  --> exercises/08_futures/02_spawn/src/lib.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub async fn echoes(first: TcpListener, second: TcpListener) -> Result<(), anyhow::Error> {
[INFO] [stdout]   |                                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cancellation v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/07_cancellation)
[INFO] [stderr]    Compiling blocking v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/05_blocking)
[INFO] [stderr]    Compiling env_logger v0.11.8
[INFO] [stderr]    Compiling pulldown-cmark-to-cmark v15.0.1
[INFO] [stderr]    Compiling runtime v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/03_runtime)
[INFO] [stdout] warning: unused import: `tokio::io::AsyncWriteExt`
[INFO] [stdout]  --> exercises/08_futures/03_runtime/src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tokio::io::AsyncWriteExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]  --> exercises/08_futures/03_runtime/src/lib.rs:8:29
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn fixed_reply<T>(first: TcpListener, second: TcpListener, reply: T)
[INFO] [stdout]   |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]  --> exercises/08_futures/03_runtime/src/lib.rs:8:49
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn fixed_reply<T>(first: TcpListener, second: TcpListener, reply: T)
[INFO] [stdout]   |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reply`
[INFO] [stdout]  --> exercises/08_futures/03_runtime/src/lib.rs:8:70
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub async fn fixed_reply<T>(first: TcpListener, second: TcpListener, reply: T)
[INFO] [stdout]   |                                                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_reply`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async_locks v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/06_async_aware_primitives)
[INFO] [stderr]    Compiling outro_08 v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/08_outro)
[INFO] [stderr]    Compiling future v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/04_future)
[INFO] [stderr]    Compiling iterators v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/04_iterators)
[INFO] [stdout] error: future cannot be sent between threads safely
[INFO] [stdout]    --> exercises/08_futures/04_future/src/lib.rs:9:18
[INFO] [stdout]     |
[INFO] [stdout]   9 |     tokio::spawn(example());
[INFO] [stdout]     |                  ^^^^^^^^^ future returned by `example` is not `Send`
[INFO] [stdout]     |
[INFO] [stdout]     = help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `Rc<i32>`
[INFO] [stdout] note: future is not `Send` as this value is used across an await
[INFO] [stdout]    --> exercises/08_futures/04_future/src/lib.rs:14:17
[INFO] [stdout]     |
[INFO] [stdout]  13 |     let non_send = Rc::new(1);
[INFO] [stdout]     |         -------- has type `Rc<i32>` which is not `Send`
[INFO] [stdout]  14 |     yield_now().await;
[INFO] [stdout]     |                 ^^^^^ await occurs here, with `non_send` maybe used later
[INFO] [stdout] note: required by a bound in `tokio::spawn`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.48.0/src/task/spawn.rs:171:21
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn spawn<F>(future: F) -> JoinHandle<F::Output>
[INFO] [stdout]     |            ----- required by a bound in this function
[INFO] [stdout] 170 |     where
[INFO] [stdout] 171 |         F: Future + Send + 'static,
[INFO] [stdout]     |                     ^^^^ required by this bound in `spawn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `future` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "90b4bbfda17e42dc0c60891d30c38b03bf0bd37901c909cab182d3e5b89860fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90b4bbfda17e42dc0c60891d30c38b03bf0bd37901c909cab182d3e5b89860fe", kill_on_drop: false }`
[INFO] [stdout] 90b4bbfda17e42dc0c60891d30c38b03bf0bd37901c909cab182d3e5b89860fe