[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 try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheng404%2Fsimple-tcp-server-rs" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cheng404/simple-tcp-server-rs on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-1/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9dd45a74862c9cb0c61d39013a63f6db7f292fdadb0f4841e41cfea87f0bf136
[INFO] running `Command { std: "docker" "start" "-a" "9dd45a74862c9cb0c61d39013a63f6db7f292fdadb0f4841e41cfea87f0bf136", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9dd45a74862c9cb0c61d39013a63f6db7f292fdadb0f4841e41cfea87f0bf136", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dd45a74862c9cb0c61d39013a63f6db7f292fdadb0f4841e41cfea87f0bf136", kill_on_drop: false }`
[INFO] [stdout] 9dd45a74862c9cb0c61d39013a63f6db7f292fdadb0f4841e41cfea87f0bf136
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c70c3046160066f394f7270dc0651d0d717f1cc759d50b9f8f19b690bbfa86c3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c70c3046160066f394f7270dc0651d0d717f1cc759d50b9f8f19b690bbfa86c3", 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: 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 0.92s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c70c3046160066f394f7270dc0651d0d717f1cc759d50b9f8f19b690bbfa86c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c70c3046160066f394f7270dc0651d0d717f1cc759d50b9f8f19b690bbfa86c3", kill_on_drop: false }`
[INFO] [stdout] c70c3046160066f394f7270dc0651d0d717f1cc759d50b9f8f19b690bbfa86c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d686afef6f990dc564a807135fcef1765f27b65251aaa38397b2741e5c263e77
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d686afef6f990dc564a807135fcef1765f27b65251aaa38397b2741e5c263e77", 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 0.90s
[INFO] running `Command { std: "docker" "inspect" "d686afef6f990dc564a807135fcef1765f27b65251aaa38397b2741e5c263e77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d686afef6f990dc564a807135fcef1765f27b65251aaa38397b2741e5c263e77", kill_on_drop: false }`
[INFO] [stdout] d686afef6f990dc564a807135fcef1765f27b65251aaa38397b2741e5c263e77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] df2c97b40da1a89400212ed49ed573e7c39019efcc269d9104bc9076d14d869f
[INFO] running `Command { std: "docker" "start" "-a" "df2c97b40da1a89400212ed49ed573e7c39019efcc269d9104bc9076d14d869f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stdout] running 2 tests
[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 0.20s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/simple_tcp_server_rs-121038184b89a1d7)
[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 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "df2c97b40da1a89400212ed49ed573e7c39019efcc269d9104bc9076d14d869f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df2c97b40da1a89400212ed49ed573e7c39019efcc269d9104bc9076d14d869f", kill_on_drop: false }`
[INFO] [stdout] df2c97b40da1a89400212ed49ed573e7c39019efcc269d9104bc9076d14d869f