[INFO] cloning repository https://github.com/rfaulhaber/kolakoski-counter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rfaulhaber/kolakoski-counter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frfaulhaber%2Fkolakoski-counter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frfaulhaber%2Fkolakoski-counter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff0ae4792a2a31bdf4be02e596c5bcd4f28e917c
[INFO] checking rfaulhaber/kolakoski-counter/ff0ae4792a2a31bdf4be02e596c5bcd4f28e917c against master#19f42cb9bb65555e7d95dab7d17573ae6c5d634c for pr-139087
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frfaulhaber%2Fkolakoski-counter" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rfaulhaber/kolakoski-counter on toolchain 19f42cb9bb65555e7d95dab7d17573ae6c5d634c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rfaulhaber/kolakoski-counter
[INFO] finished tweaking git repo https://github.com/rfaulhaber/kolakoski-counter
[INFO] tweaked toml for git repo https://github.com/rfaulhaber/kolakoski-counter written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rfaulhaber/kolakoski-counter 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" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d300bb4f29e3128be53cdf94e83b41af2f96398f9f763b9d72c744d487ce9617
[INFO] running `Command { std: "docker" "start" "-a" "d300bb4f29e3128be53cdf94e83b41af2f96398f9f763b9d72c744d487ce9617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d300bb4f29e3128be53cdf94e83b41af2f96398f9f763b9d72c744d487ce9617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d300bb4f29e3128be53cdf94e83b41af2f96398f9f763b9d72c744d487ce9617", kill_on_drop: false }`
[INFO] [stdout] d300bb4f29e3128be53cdf94e83b41af2f96398f9f763b9d72c744d487ce9617
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c53a43046780f303d3ab4e4538c45940da2ddc4db3354a217f2ae7f641fb8e1
[INFO] running `Command { std: "docker" "start" "-a" "7c53a43046780f303d3ab4e4538c45940da2ddc4db3354a217f2ae7f641fb8e1", kill_on_drop: false }`
[INFO] [stderr]     Checking kol-counter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `prev_run` is never read
[INFO] [stdout]  --> src/seq.rs:2:2
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct KolSeq {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 2 |     prev_run: Run,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/seq.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl KolSeq {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 8 |     pub fn new() -> KolSeq {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `first` is never used
[INFO] [stdout]   --> src/seq.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Run {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 28 |     fn first(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `prev_run` is never read
[INFO] [stdout]  --> src/seq.rs:2:2
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct KolSeq {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 2 |     prev_run: Run,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `first` is never used
[INFO] [stdout]   --> src/seq.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Run {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 28 |     fn first(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "7c53a43046780f303d3ab4e4538c45940da2ddc4db3354a217f2ae7f641fb8e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c53a43046780f303d3ab4e4538c45940da2ddc4db3354a217f2ae7f641fb8e1", kill_on_drop: false }`
[INFO] [stdout] 7c53a43046780f303d3ab4e4538c45940da2ddc4db3354a217f2ae7f641fb8e1