[INFO] cloning repository https://github.com/maciexZ/algorithms-course
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maciexZ/algorithms-course" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmaciexZ%2Falgorithms-course", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmaciexZ%2Falgorithms-course'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a158c9fbe9c086fe1d760f5673998d3e5a62b002
[INFO] testing maciexZ/algorithms-course against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmaciexZ%2Falgorithms-course" "/workspace/builds/worker-34/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-34/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/maciexZ/algorithms-course 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/maciexZ/algorithms-course
[INFO] finished tweaking git repo https://github.com/maciexZ/algorithms-course
[INFO] tweaked toml for git repo https://github.com/maciexZ/algorithms-course written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] crate git repo https://github.com/maciexZ/algorithms-course 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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] 4a37981e8ca46baa88423f10139b792f607309617120fc1a0115a188ad2f1439
[INFO] running `Command { std: "docker" "start" "-a" "4a37981e8ca46baa88423f10139b792f607309617120fc1a0115a188ad2f1439", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a37981e8ca46baa88423f10139b792f607309617120fc1a0115a188ad2f1439", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a37981e8ca46baa88423f10139b792f607309617120fc1a0115a188ad2f1439", kill_on_drop: false }`
[INFO] [stdout] 4a37981e8ca46baa88423f10139b792f607309617120fc1a0115a188ad2f1439
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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] 3deb2da4ff71552f20834b5a4e26f998ff3c64e02495d794cd08cf90a19da5eb
[INFO] running `Command { std: "docker" "start" "-a" "3deb2da4ff71552f20834b5a4e26f998ff3c64e02495d794cd08cf90a19da5eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling algorithms_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/simple_sorting.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "3deb2da4ff71552f20834b5a4e26f998ff3c64e02495d794cd08cf90a19da5eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3deb2da4ff71552f20834b5a4e26f998ff3c64e02495d794cd08cf90a19da5eb", kill_on_drop: false }`
[INFO] [stdout] 3deb2da4ff71552f20834b5a4e26f998ff3c64e02495d794cd08cf90a19da5eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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] 3073c60f5a91732f0d9bb7213c7f266a3d0ec88693f247e30f6f2a57de954435
[INFO] running `Command { std: "docker" "start" "-a" "3073c60f5a91732f0d9bb7213c7f266a3d0ec88693f247e30f6f2a57de954435", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/simple_sorting.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling algorithms_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/simple_sorting.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.27s
[INFO] running `Command { std: "docker" "inspect" "3073c60f5a91732f0d9bb7213c7f266a3d0ec88693f247e30f6f2a57de954435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3073c60f5a91732f0d9bb7213c7f266a3d0ec88693f247e30f6f2a57de954435", kill_on_drop: false }`
[INFO] [stdout] 3073c60f5a91732f0d9bb7213c7f266a3d0ec88693f247e30f6f2a57de954435
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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] 0090e34668c25198a3671b7b7297f7e9db0e18bf1270ce6cb5d11e833ea41b09
[INFO] running `Command { std: "docker" "start" "-a" "0090e34668c25198a3671b7b7297f7e9db0e18bf1270ce6cb5d11e833ea41b09", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `std::vec`
[INFO] [stderr]  --> src/simple_sorting.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::vec;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `algorithms_course` (lib) generated 1 warning
[INFO] [stderr] warning: `algorithms_course` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.22s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/algorithms_course-08eab4004443df20)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test divide_and_conquer::tests::eq_lenght ... ok
[INFO] [stdout] test divide_and_conquer::tests::non_eq_lenght ... ok
[INFO] [stdout] test divide_and_conquer::tests::negative_number ... ok
[INFO] [stdout] test divide_and_conquer::tests::even_number_of_items ... ok
[INFO] [stdout] test divide_and_conquer::tests::zero_multiplication ... ok
[INFO] [stdout] test divide_and_conquer::tests::odd_number_of_items ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests algorithms_course
[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" "0090e34668c25198a3671b7b7297f7e9db0e18bf1270ce6cb5d11e833ea41b09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0090e34668c25198a3671b7b7297f7e9db0e18bf1270ce6cb5d11e833ea41b09", kill_on_drop: false }`
[INFO] [stdout] 0090e34668c25198a3671b7b7297f7e9db0e18bf1270ce6cb5d11e833ea41b09