[INFO] cloning repository https://github.com/tony612/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tony612/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftony612%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftony612%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e8d8fd7663bcf27fc461be20b9af3b58d3f541d
[INFO] checking tony612/rust-by-example against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftony612%2Frust-by-example" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tony612/rust-by-example on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tony612/rust-by-example
[INFO] finished tweaking git repo https://github.com/tony612/rust-by-example
[INFO] tweaked toml for git repo https://github.com/tony612/rust-by-example written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/tony612/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3905332257ab064156b40ae5eb5fd2e536e30532f71f35acde6908006d36eb2
[INFO] running `Command { std: "docker" "start" "-a" "c3905332257ab064156b40ae5eb5fd2e536e30532f71f35acde6908006d36eb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3905332257ab064156b40ae5eb5fd2e536e30532f71f35acde6908006d36eb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3905332257ab064156b40ae5eb5fd2e536e30532f71f35acde6908006d36eb2", kill_on_drop: false }`
[INFO] [stdout] c3905332257ab064156b40ae5eb5fd2e536e30532f71f35acde6908006d36eb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be6a897362e6dc649103018edc378cf362971d7d2640e15440d4c17187640673
[INFO] running `Command { std: "docker" "start" "-a" "be6a897362e6dc649103018edc378cf362971d7d2640e15440d4c17187640673", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling tokio v1.6.1
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]     Checking rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `longest`
[INFO] [stdout]  --> src/lifetime/function.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn longest<'a>(s1: &'a String, s2: &'a String) -> &'a String {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `pick_first`
[INFO] [stdout]   --> src/lifetime/function.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn pick_first<'a>(s1: &'a String, _s2: &String) -> &'a String {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MyStruct`
[INFO] [stdout]  --> src/lifetime/method.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct MyStruct {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty`
[INFO] [stdout]  --> src/lifetime/method.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn empty(&self, _msg: &str) -> &str {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `msg`
[INFO] [stdout]  --> src/lifetime/method.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn msg<'a>(&self, msg: &'a str) -> &'a str {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MyStruct`
[INFO] [stdout]  --> src/lifetime/struct.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct MyStruct<'a> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty`
[INFO] [stdout]  --> src/lifetime/struct.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn empty(&self, _msg: &str) -> &str {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `msg`
[INFO] [stdout]   --> src/lifetime/struct.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn msg<'b>(&self, msg: &'b str) -> &'b str {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> src/tokio/actor.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     data: Request,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sender`
[INFO] [stdout]   --> src/tokio/actor.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     sender: oneshot::Sender<Reply>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `spawn`
[INFO] [stdout]   --> src/tokio/actor.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn spawn<A: Actor>(mut actor: A, mailbox: usize) -> Pid<A::Request, A::Reply>
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send`
[INFO] [stdout]   --> src/tokio/actor.rs:41:18
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub async fn send(&self, data: Request) -> Result<Reply> {
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.64s
[INFO] running `Command { std: "docker" "inspect" "be6a897362e6dc649103018edc378cf362971d7d2640e15440d4c17187640673", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be6a897362e6dc649103018edc378cf362971d7d2640e15440d4c17187640673", kill_on_drop: false }`
[INFO] [stdout] be6a897362e6dc649103018edc378cf362971d7d2640e15440d4c17187640673