[INFO] cloning repository https://github.com/jiyuan0125/oneblock_lesson4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jiyuan0125/oneblock_lesson4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiyuan0125%2Foneblock_lesson4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiyuan0125%2Foneblock_lesson4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf9abe9aab8a80f89870a1bd4f7cfd5937abadb6
[INFO] checking jiyuan0125/oneblock_lesson4 against master#419b3e2d3e350822550eee0e82eeded4d324d584 for pr-135536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiyuan0125%2Foneblock_lesson4" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jiyuan0125/oneblock_lesson4 on toolchain 419b3e2d3e350822550eee0e82eeded4d324d584
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jiyuan0125/oneblock_lesson4
[INFO] finished tweaking git repo https://github.com/jiyuan0125/oneblock_lesson4
[INFO] tweaked toml for git repo https://github.com/jiyuan0125/oneblock_lesson4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jiyuan0125/oneblock_lesson4 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" "+419b3e2d3e350822550eee0e82eeded4d324d584" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 761c39bf33feec075aaf6420d46174a9fa02a79bf51c99bf96804c12b84db9b0
[INFO] running `Command { std: "docker" "start" "-a" "761c39bf33feec075aaf6420d46174a9fa02a79bf51c99bf96804c12b84db9b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "761c39bf33feec075aaf6420d46174a9fa02a79bf51c99bf96804c12b84db9b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "761c39bf33feec075aaf6420d46174a9fa02a79bf51c99bf96804c12b84db9b0", kill_on_drop: false }`
[INFO] [stdout] 761c39bf33feec075aaf6420d46174a9fa02a79bf51c99bf96804c12b84db9b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a63ba6a9dd48f8c8c76d9e7257ce6e139c219d54a2435053ae251614d284023a
[INFO] running `Command { std: "docker" "start" "-a" "a63ba6a9dd48f8c8c76d9e7257ce6e139c219d54a2435053ae251614d284023a", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]     Checking lesson4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Red`, `Yellow`, and `Green` are never constructed
[INFO] [stdout]  --> src/traffic_light.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum TrafficLight {
[INFO] [stdout]   |          ------------ variants in this enum
[INFO] [stdout] 2 |     Red,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 3 |     Yellow,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 4 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `time` is never used
[INFO] [stdout]  --> src/traffic_light.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Time {
[INFO] [stdout]   |           ---- method in this trait
[INFO] [stdout] 8 |     fn time(&self) -> u8;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `u32_slice_sum` is never used
[INFO] [stdout]  --> src/u32_slice_sum.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn u32_slice_sum(slice: &[u32]) -> Option<u32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_area` is never used
[INFO] [stdout]  --> src/area.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Shape {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] 2 |     fn get_area(&self) -> Option<f64>;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/area.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Rectangle {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 11 |     pub fn new(width: f64, height: f64) -> anyhow::Result<Rectangle> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/area.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Square {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 34 |     pub fn new(width: f64) -> anyhow::Result<Square> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/area.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl Circle {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 57 |     pub fn new(radius: f64) -> anyhow::Result<Circle> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_area` is never used
[INFO] [stdout]   --> src/area.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub fn get_area<T: Shape>(shape: &T) -> Option<f64> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_area` is never used
[INFO] [stdout]   --> src/area.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn print_area<T: Shape>(shape: &T) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_area` is never used
[INFO] [stdout]   --> src/area.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn print_area<T: Shape>(shape: &T) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "a63ba6a9dd48f8c8c76d9e7257ce6e139c219d54a2435053ae251614d284023a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a63ba6a9dd48f8c8c76d9e7257ce6e139c219d54a2435053ae251614d284023a", kill_on_drop: false }`
[INFO] [stdout] a63ba6a9dd48f8c8c76d9e7257ce6e139c219d54a2435053ae251614d284023a