[INFO] cloning repository https://github.com/cheng404/simple-tcp-server-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cheng404/simple-tcp-server-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheng404%2Fsimple-tcp-server-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheng404%2Fsimple-tcp-server-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7871393efa99c8a85205340e69b3c7a6482279ec
[INFO] testing cheng404/simple-tcp-server-rs against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheng404%2Fsimple-tcp-server-rs" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cheng404/simple-tcp-server-rs on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cheng404/simple-tcp-server-rs
[INFO] finished tweaking git repo https://github.com/cheng404/simple-tcp-server-rs
[INFO] tweaked toml for git repo https://github.com/cheng404/simple-tcp-server-rs written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate git repo https://github.com/cheng404/simple-tcp-server-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f3a2db61735a0191c1233e1c2c43ce109693461df5d5aca8254a81299e07f54
[INFO] running `Command { std: "docker" "start" "-a" "3f3a2db61735a0191c1233e1c2c43ce109693461df5d5aca8254a81299e07f54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f3a2db61735a0191c1233e1c2c43ce109693461df5d5aca8254a81299e07f54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f3a2db61735a0191c1233e1c2c43ce109693461df5d5aca8254a81299e07f54", kill_on_drop: false }`
[INFO] [stdout] 3f3a2db61735a0191c1233e1c2c43ce109693461df5d5aca8254a81299e07f54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7ed9f4a0f2c4b5ac20bf0467b9847a77292eaeaec6c1bef9d31cd4aa0e05e4a
[INFO] running `Command { std: "docker" "start" "-a" "c7ed9f4a0f2c4b5ac20bf0467b9847a77292eaeaec6c1bef9d31cd4aa0e05e4a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling simple-tcp-server-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Red`
[INFO] [stdout]  --> src/lesson4.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Red,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Yellow`
[INFO] [stdout]  --> src/lesson4.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Yellow,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Green`
[INFO] [stdout]  --> src/lesson4.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Green
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sum_numbers`
[INFO] [stdout]   --> src/lesson4.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn sum_numbers(numbers: &[u32]) -> Option<u32> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_sharp_area`
[INFO] [stdout]   --> src/lesson4.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn print_sharp_area<T: Sharp>(sharp: T) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.06s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c7ed9f4a0f2c4b5ac20bf0467b9847a77292eaeaec6c1bef9d31cd4aa0e05e4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7ed9f4a0f2c4b5ac20bf0467b9847a77292eaeaec6c1bef9d31cd4aa0e05e4a", kill_on_drop: false }`
[INFO] [stdout] c7ed9f4a0f2c4b5ac20bf0467b9847a77292eaeaec6c1bef9d31cd4aa0e05e4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffe10ad51590a61b9d09e42f5c3a6ad334a5cd10ba49ab59ee85b1a27cd0ae04
[INFO] running `Command { std: "docker" "start" "-a" "ffe10ad51590a61b9d09e42f5c3a6ad334a5cd10ba49ab59ee85b1a27cd0ae04", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple-tcp-server-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Red`
[INFO] [stdout]  --> src/lesson4.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Red,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Yellow`
[INFO] [stdout]  --> src/lesson4.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Yellow,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Green`
[INFO] [stdout]  --> src/lesson4.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Green
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "ffe10ad51590a61b9d09e42f5c3a6ad334a5cd10ba49ab59ee85b1a27cd0ae04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffe10ad51590a61b9d09e42f5c3a6ad334a5cd10ba49ab59ee85b1a27cd0ae04", kill_on_drop: false }`
[INFO] [stdout] ffe10ad51590a61b9d09e42f5c3a6ad334a5cd10ba49ab59ee85b1a27cd0ae04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8bcb0b94483941865c3d72afb4789e05535c866940ffd912176f3e0edf8cfacc
[INFO] running `Command { std: "docker" "start" "-a" "8bcb0b94483941865c3d72afb4789e05535c866940ffd912176f3e0edf8cfacc", kill_on_drop: false }`
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]  --> src/lesson4.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Red,
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Yellow`
[INFO] [stderr]  --> src/lesson4.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Yellow,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]  --> src/lesson4.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Green
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `simple-tcp-server-rs` (bin "simple-tcp-server-rs" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/simple_tcp_server_rs-eed9f95c8ce243c0)
[INFO] [stdout] running 2 tests
[INFO] [stdout] test lesson4::test_print_sharp_area ... ok
[INFO] [stdout] test lesson4::test_sum_numbers ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8bcb0b94483941865c3d72afb4789e05535c866940ffd912176f3e0edf8cfacc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bcb0b94483941865c3d72afb4789e05535c866940ffd912176f3e0edf8cfacc", kill_on_drop: false }`
[INFO] [stdout] 8bcb0b94483941865c3d72afb4789e05535c866940ffd912176f3e0edf8cfacc