[INFO] cloning repository https://github.com/dnorman/advent-of-code-2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dnorman/advent-of-code-2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdnorman%2Fadvent-of-code-2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdnorman%2Fadvent-of-code-2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 206f67ee444a74cdfdf2e3457e2a619e0a374fba
[INFO] checking dnorman/advent-of-code-2021 against master#2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4 for pr-84385
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdnorman%2Fadvent-of-code-2021" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dnorman/advent-of-code-2021 on toolchain 2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dnorman/advent-of-code-2021
[INFO] finished tweaking git repo https://github.com/dnorman/advent-of-code-2021
[INFO] tweaked toml for git repo https://github.com/dnorman/advent-of-code-2021 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/dnorman/advent-of-code-2021 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "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]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f3266cb7c960c7c66a2b4f7433bbeadbee861db59ef2fbf9d0bb208a1389030
[INFO] running `Command { std: "docker" "start" "-a" "2f3266cb7c960c7c66a2b4f7433bbeadbee861db59ef2fbf9d0bb208a1389030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f3266cb7c960c7c66a2b4f7433bbeadbee861db59ef2fbf9d0bb208a1389030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f3266cb7c960c7c66a2b4f7433bbeadbee861db59ef2fbf9d0bb208a1389030", kill_on_drop: false }`
[INFO] [stdout] 2f3266cb7c960c7c66a2b4f7433bbeadbee861db59ef2fbf9d0bb208a1389030
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6ea59ef4b625ce5f247e9f8f9a4d5915af712632aa2319d2dd0d34841f56e22
[INFO] running `Command { std: "docker" "start" "-a" "c6ea59ef4b625ce5f247e9f8f9a4d5915af712632aa2319d2dd0d34841f56e22", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `retain_mut::RetainMut`
[INFO] [stdout]   --> src/challenge/day4p2.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         use retain_mut::RetainMut;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `retain_mut::RetainMut`
[INFO] [stdout]   --> src/challenge/day4p2.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         use retain_mut::RetainMut;
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 52.19s
[INFO] running `Command { std: "docker" "inspect" "c6ea59ef4b625ce5f247e9f8f9a4d5915af712632aa2319d2dd0d34841f56e22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6ea59ef4b625ce5f247e9f8f9a4d5915af712632aa2319d2dd0d34841f56e22", kill_on_drop: false }`
[INFO] [stdout] c6ea59ef4b625ce5f247e9f8f9a4d5915af712632aa2319d2dd0d34841f56e22