[INFO] cloning repository https://github.com/michirakara/rs-mcr-lib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michirakara/rs-mcr-lib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichirakara%2Frs-mcr-lib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichirakara%2Frs-mcr-lib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08fc3eeb83d8c3140c59df0416bc815f502aa394
[INFO] checking michirakara/rs-mcr-lib against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichirakara%2Frs-mcr-lib" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michirakara/rs-mcr-lib
[INFO] finished tweaking git repo https://github.com/michirakara/rs-mcr-lib
[INFO] tweaked toml for git repo https://github.com/michirakara/rs-mcr-lib written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michirakara/rs-mcr-lib on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michirakara/rs-mcr-lib 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75c0c5722332237d2cebf8729e609ca9ef6c90d39b7c12bb5e251bcf0e294034
[INFO] running `Command { std: "docker" "start" "-a" "75c0c5722332237d2cebf8729e609ca9ef6c90d39b7c12bb5e251bcf0e294034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75c0c5722332237d2cebf8729e609ca9ef6c90d39b7c12bb5e251bcf0e294034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75c0c5722332237d2cebf8729e609ca9ef6c90d39b7c12bb5e251bcf0e294034", kill_on_drop: false }`
[INFO] [stdout] 75c0c5722332237d2cebf8729e609ca9ef6c90d39b7c12bb5e251bcf0e294034
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26e986f8a470a7914efbef6e16468d81f75069cb722c4f24bb014c5ea2565245
[INFO] running `Command { std: "docker" "start" "-a" "26e986f8a470a7914efbef6e16468d81f75069cb722c4f24bb014c5ea2565245", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking rs_mcr_lib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Matrix` is never constructed
[INFO] [stdout]  --> src/data_structure/matrix.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Matrix<T> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `h`, `w`, and `v` are never read
[INFO] [stdout]  --> src/data_structure/matrix.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Matrix<T> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |     h: usize,
[INFO] [stdout]   |     ^
[INFO] [stdout] 5 |     w: usize,
[INFO] [stdout]   |     ^
[INFO] [stdout] 6 |     v: Vec<Vec<T>>,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rs_mcr_lib` (lib test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Matrix` is never constructed
[INFO] [stdout]  --> src/data_structure/matrix.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Matrix<T> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `h`, `w`, and `v` are never read
[INFO] [stdout]  --> src/data_structure/matrix.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Matrix<T> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |     h: usize,
[INFO] [stdout]   |     ^
[INFO] [stdout] 5 |     w: usize,
[INFO] [stdout]   |     ^
[INFO] [stdout] 6 |     v: Vec<Vec<T>>,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rs_mcr_lib` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "26e986f8a470a7914efbef6e16468d81f75069cb722c4f24bb014c5ea2565245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26e986f8a470a7914efbef6e16468d81f75069cb722c4f24bb014c5ea2565245", kill_on_drop: false }`
[INFO] [stdout] 26e986f8a470a7914efbef6e16468d81f75069cb722c4f24bb014c5ea2565245
