[INFO] cloning repository https://github.com/bhishekprajapati/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/bhishekprajapati/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbhishekprajapati%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbhishekprajapati%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 34e99a20a0dc98bed95ebca768fce983cff42900
[INFO] testing bhishekprajapati/learn-rust/34e99a20a0dc98bed95ebca768fce983cff42900 against master#8dd5cd0bc1d683c30805e1dc831cac546b621a75 for pr-131095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbhishekprajapati%2Flearn-rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bhishekprajapati/learn-rust on toolchain 8dd5cd0bc1d683c30805e1dc831cac546b621a75
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8dd5cd0bc1d683c30805e1dc831cac546b621a75" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bhishekprajapati/learn-rust
[INFO] finished tweaking git repo https://github.com/bhishekprajapati/learn-rust
[INFO] tweaked toml for git repo https://github.com/bhishekprajapati/learn-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bhishekprajapati/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8dd5cd0bc1d683c30805e1dc831cac546b621a75" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /workspace/builds/worker-5-tc1/source/exercises/02_basic_calculator/08_overflow/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pulldown-cmark-to-cmark v15.0.1
[INFO] [stderr]   Downloaded clap_complete v4.5.12
[INFO] [stderr]   Downloaded pulldown-cmark v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+8dd5cd0bc1d683c30805e1dc831cac546b621a75" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "24e9e0cca78991460919e08148532301a4eef10ed1e28e0bae478242ae798e33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24e9e0cca78991460919e08148532301a4eef10ed1e28e0bae478242ae798e33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e9e0cca78991460919e08148532301a4eef10ed1e28e0bae478242ae798e33", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+8dd5cd0bc1d683c30805e1dc831cac546b621a75" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "b237ba2fbcb7f0cf88f6c78843d8ad72f671ce35c4ff5675058286ef0ac0ed89", kill_on_drop: false }`
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[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
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[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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling future v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/04_future)
[INFO] [stderr]    Compiling spawn v0.1.0 (/opt/rustwide/workdir/exercises/08_futures/02_spawn)
[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>`, which is required by `impl Future<Output = ()>: Send`
[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-6f17d22bba15001f/tokio-1.39.2/src/task/spawn.rs:167:21
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn spawn<F>(future: F) -> JoinHandle<F::Output>
[INFO] [stdout]     |            ----- required by a bound in this function
[INFO] [stdout] 166 |     where
[INFO] [stdout] 167 |         F: Future + Send + 'static,
[INFO] [stdout]     |                     ^^^^ required by this bound in `spawn`
[INFO] [stdout] 
[INFO] [stdout] 
[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)]` 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] 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" "b237ba2fbcb7f0cf88f6c78843d8ad72f671ce35c4ff5675058286ef0ac0ed89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b237ba2fbcb7f0cf88f6c78843d8ad72f671ce35c4ff5675058286ef0ac0ed89", kill_on_drop: false }`
[INFO] [stdout] b237ba2fbcb7f0cf88f6c78843d8ad72f671ce35c4ff5675058286ef0ac0ed89