[INFO] cloning repository https://github.com/EParedez/rust-kmeans
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EParedez/rust-kmeans" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEParedez%2Frust-kmeans", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEParedez%2Frust-kmeans'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 75f5583c2ad145b831b89ca1f07be7400201c3e8
[INFO] testing EParedez/rust-kmeans against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEParedez%2Frust-kmeans" "/workspace/builds/worker-56/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-56/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EParedez/rust-kmeans 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/EParedez/rust-kmeans
[INFO] finished tweaking git repo https://github.com/EParedez/rust-kmeans
[INFO] tweaked toml for git repo https://github.com/EParedez/rust-kmeans written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] crate git repo https://github.com/EParedez/rust-kmeans 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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 08466d7ef59a16d6f6e2ddaec82963197841f4bfc1c4c58728ee9ca3534319d0
[INFO] running `Command { std: "docker" "start" "-a" "08466d7ef59a16d6f6e2ddaec82963197841f4bfc1c4c58728ee9ca3534319d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08466d7ef59a16d6f6e2ddaec82963197841f4bfc1c4c58728ee9ca3534319d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08466d7ef59a16d6f6e2ddaec82963197841f4bfc1c4c58728ee9ca3534319d0", kill_on_drop: false }`
[INFO] [stdout] 08466d7ef59a16d6f6e2ddaec82963197841f4bfc1c4c58728ee9ca3534319d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 60c1d0f18af65b136743a055cd2828dfcfe37679fe3e6efcded469ad010aa80a
[INFO] running `Command { std: "docker" "start" "-a" "60c1d0f18af65b136743a055cd2828dfcfe37679fe3e6efcded469ad010aa80a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling rawpointer v0.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling rulinalg v0.3.7
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling rusty-machine v0.5.4
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]    Compiling structopt v0.3.23
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling rust-kmeans v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `centroid`
[INFO] [stdout]   --> src/bin/generate.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         for centroid in centroids.iter_rows() {
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_centroid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/generate.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     writer.write_record(&["height", "length"]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `Command { std: "docker" "inspect" "60c1d0f18af65b136743a055cd2828dfcfe37679fe3e6efcded469ad010aa80a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60c1d0f18af65b136743a055cd2828dfcfe37679fe3e6efcded469ad010aa80a", kill_on_drop: false }`
[INFO] [stdout] 60c1d0f18af65b136743a055cd2828dfcfe37679fe3e6efcded469ad010aa80a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 7d26fa0c32963b457c59c9e434fc9413283111cd1a73fd01379c042c47b6b300
[INFO] running `Command { std: "docker" "start" "-a" "7d26fa0c32963b457c59c9e434fc9413283111cd1a73fd01379c042c47b6b300", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-kmeans v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `centroid`
[INFO] [stdout]   --> src/bin/generate.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         for centroid in centroids.iter_rows() {
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_centroid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/generate.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     writer.write_record(&["height", "length"]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 18.22s
[INFO] running `Command { std: "docker" "inspect" "7d26fa0c32963b457c59c9e434fc9413283111cd1a73fd01379c042c47b6b300", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d26fa0c32963b457c59c9e434fc9413283111cd1a73fd01379c042c47b6b300", kill_on_drop: false }`
[INFO] [stdout] 7d26fa0c32963b457c59c9e434fc9413283111cd1a73fd01379c042c47b6b300
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 0c7191f13b365ac998f066c5170b64369a447a8c138c8aa876b7ad0ce8df48bf
[INFO] running `Command { std: "docker" "start" "-a" "0c7191f13b365ac998f066c5170b64369a447a8c138c8aa876b7ad0ce8df48bf", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `centroid`
[INFO] [stderr]   --> src/bin/generate.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         for centroid in centroids.iter_rows() {
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_centroid`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/generate.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     writer.write_record(&["height", "length"]);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-kmeans` (bin "generate" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/generate-3e3727d3c4d01057)
[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] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_kmeans-4249710eaedf052d)
[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" "0c7191f13b365ac998f066c5170b64369a447a8c138c8aa876b7ad0ce8df48bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c7191f13b365ac998f066c5170b64369a447a8c138c8aa876b7ad0ce8df48bf", kill_on_drop: false }`
[INFO] [stdout] 0c7191f13b365ac998f066c5170b64369a447a8c138c8aa876b7ad0ce8df48bf