[INFO] cloning repository https://github.com/DmitriyYankovskiy/Rust_ML
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DmitriyYankovskiy/Rust_ML" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDmitriyYankovskiy%2FRust_ML", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDmitriyYankovskiy%2FRust_ML'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 764064ae997c0178a9f684f4eb78bf1c438c6da3
[INFO] checking DmitriyYankovskiy/Rust_ML/764064ae997c0178a9f684f4eb78bf1c438c6da3 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDmitriyYankovskiy%2FRust_ML" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DmitriyYankovskiy/Rust_ML on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DmitriyYankovskiy/Rust_ML
[INFO] finished tweaking git repo https://github.com/DmitriyYankovskiy/Rust_ML
[INFO] tweaked toml for git repo https://github.com/DmitriyYankovskiy/Rust_ML written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/DmitriyYankovskiy/Rust_ML 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d418f0d85d4e3561e3b259346a9d3d7877b95cfbb3da51383ec83396dc678998
[INFO] running `Command { std: "docker" "start" "-a" "d418f0d85d4e3561e3b259346a9d3d7877b95cfbb3da51383ec83396dc678998", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d418f0d85d4e3561e3b259346a9d3d7877b95cfbb3da51383ec83396dc678998", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d418f0d85d4e3561e3b259346a9d3d7877b95cfbb3da51383ec83396dc678998", kill_on_drop: false }`
[INFO] [stdout] d418f0d85d4e3561e3b259346a9d3d7877b95cfbb3da51383ec83396dc678998
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0d4d4a041071044310cc7606fe95f7082207d9db34e60829e4cc26ff23b8146
[INFO] running `Command { std: "docker" "start" "-a" "b0d4d4a041071044310cc7606fe95f7082207d9db34e60829e4cc26ff23b8146", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.190
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling serde_derive v1.0.190
[INFO] [stderr]     Checking network v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `json`
[INFO] [stdout]   --> src/network.rs:11:28
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde_json::{from_str, json};
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `json`
[INFO] [stdout]   --> src/network.rs:11:28
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde_json::{from_str, json};
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]    --> src/matrix.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let rows = self.rows;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cols`
[INFO] [stdout]    --> src/matrix.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 |         let cols = other.cols;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_cols`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]    --> src/matrix.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let rows = self.rows;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cols`
[INFO] [stdout]    --> src/matrix.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 |         let cols = other.cols;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_cols`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.47s
[INFO] running `Command { std: "docker" "inspect" "b0d4d4a041071044310cc7606fe95f7082207d9db34e60829e4cc26ff23b8146", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0d4d4a041071044310cc7606fe95f7082207d9db34e60829e4cc26ff23b8146", kill_on_drop: false }`
[INFO] [stdout] b0d4d4a041071044310cc7606fe95f7082207d9db34e60829e4cc26ff23b8146