[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] testing jiyuan0125/oneblock_lesson4 against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiyuan0125%2Foneblock_lesson4" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[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-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jiyuan0125/oneblock_lesson4 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c127b537a3732f28138802919c67e560659b6bed9123a4f207d7f8954112528c
[INFO] running `Command { std: "docker" "start" "-a" "c127b537a3732f28138802919c67e560659b6bed9123a4f207d7f8954112528c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c127b537a3732f28138802919c67e560659b6bed9123a4f207d7f8954112528c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c127b537a3732f28138802919c67e560659b6bed9123a4f207d7f8954112528c", kill_on_drop: false }`
[INFO] [stdout] c127b537a3732f28138802919c67e560659b6bed9123a4f207d7f8954112528c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df52c78da8471aa2f917f246192451c6b5609424173b9b1b04aa7bfa24841daf
[INFO] running `Command { std: "docker" "start" "-a" "df52c78da8471aa2f917f246192451c6b5609424173b9b1b04aa7bfa24841daf", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]    Compiling lesson4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `TrafficLight` is never used
[INFO] [stdout]  --> src/traffic_light.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum TrafficLight {
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Time` is never used
[INFO] [stdout]  --> src/traffic_light.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Time {
[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: trait `Shape` is never used
[INFO] [stdout]  --> src/area.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Shape {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/area.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Rectangle {
[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: struct `Square` is never constructed
[INFO] [stdout]   --> src/area.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Square {
[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: struct `Circle` is never constructed
[INFO] [stdout]   --> src/area.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct Circle {
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "df52c78da8471aa2f917f246192451c6b5609424173b9b1b04aa7bfa24841daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df52c78da8471aa2f917f246192451c6b5609424173b9b1b04aa7bfa24841daf", kill_on_drop: false }`
[INFO] [stdout] df52c78da8471aa2f917f246192451c6b5609424173b9b1b04aa7bfa24841daf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1b55b0ad5a5ddd293c66822ffa734ee93f2043093ef8a950921694a6377eb55
[INFO] running `Command { std: "docker" "start" "-a" "c1b55b0ad5a5ddd293c66822ffa734ee93f2043093ef8a950921694a6377eb55", kill_on_drop: false }`
[INFO] [stdout] warning: enum `TrafficLight` is never used
[INFO] [stdout]  --> src/traffic_light.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum TrafficLight {
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Time` is never used
[INFO] [stdout]  --> src/traffic_light.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Time {
[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: trait `Shape` is never used
[INFO] [stdout]  --> src/area.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Shape {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/area.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Rectangle {
[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] [stderr]    Compiling lesson4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Square` is never constructed
[INFO] [stdout]   --> src/area.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Square {
[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: struct `Circle` is never constructed
[INFO] [stdout]   --> src/area.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct Circle {
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "c1b55b0ad5a5ddd293c66822ffa734ee93f2043093ef8a950921694a6377eb55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1b55b0ad5a5ddd293c66822ffa734ee93f2043093ef8a950921694a6377eb55", kill_on_drop: false }`
[INFO] [stdout] c1b55b0ad5a5ddd293c66822ffa734ee93f2043093ef8a950921694a6377eb55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0ddd54aba011c24757a66f0fcbac6bcffb5c478aa37d37355324cd73ba477371
[INFO] running `Command { std: "docker" "start" "-a" "0ddd54aba011c24757a66f0fcbac6bcffb5c478aa37d37355324cd73ba477371", kill_on_drop: false }`
[INFO] [stderr] warning: enum `TrafficLight` is never used
[INFO] [stderr]  --> src/traffic_light.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum TrafficLight {
[INFO] [stderr]   |          ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Time` is never used
[INFO] [stderr]  --> src/traffic_light.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub trait Time {
[INFO] [stderr]   |           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `u32_slice_sum` is never used
[INFO] [stderr]  --> src/u32_slice_sum.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn u32_slice_sum(slice: &[u32]) -> Option<u32> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Shape` is never used
[INFO] [stderr]  --> src/area.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait Shape {
[INFO] [stderr]   |           ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]  --> src/area.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Rectangle {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/area.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl Rectangle {
[INFO] [stderr]    | -------------- associated function in this implementation
[INFO] [stderr] 11 |     pub fn new(width: f64, height: f64) -> anyhow::Result<Rectangle> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Square` is never constructed
[INFO] [stderr]   --> src/area.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct Square {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/area.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl Square {
[INFO] [stderr]    | ----------- associated function in this implementation
[INFO] [stderr] 34 |     pub fn new(width: f64) -> anyhow::Result<Square> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Circle` is never constructed
[INFO] [stderr]   --> src/area.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub struct Circle {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/area.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 56 | impl Circle {
[INFO] [stderr]    | ----------- associated function in this implementation
[INFO] [stderr] 57 |     pub fn new(radius: f64) -> anyhow::Result<Circle> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_area` is never used
[INFO] [stderr]   --> src/area.rs:76:8
[INFO] [stderr]    |
[INFO] [stderr] 76 | pub fn get_area<T: Shape>(shape: &T) -> Option<f64> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_area` is never used
[INFO] [stderr]   --> src/area.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn print_area<T: Shape>(shape: &T) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `lesson4` (lib) generated 12 warnings
[INFO] [stderr] warning: function `print_area` is never used
[INFO] [stderr]   --> src/area.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn print_area<T: Shape>(shape: &T) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `lesson4` (lib test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/lesson4-33e00bdb4c15385b)
[INFO] [stderr]    Doc-tests lesson4
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test area::test::test_get_area ... ok
[INFO] [stdout] test traffic_light::test::test_time ... ok
[INFO] [stdout] test u32_slice_sum::test::test_u32_slice_sum ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0ddd54aba011c24757a66f0fcbac6bcffb5c478aa37d37355324cd73ba477371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ddd54aba011c24757a66f0fcbac6bcffb5c478aa37d37355324cd73ba477371", kill_on_drop: false }`
[INFO] [stdout] 0ddd54aba011c24757a66f0fcbac6bcffb5c478aa37d37355324cd73ba477371
