[INFO] cloning repository https://github.com/skriems/aoc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skriems/aoc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskriems%2Faoc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskriems%2Faoc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9148cc6daba2c4a7623c8c749eadb8a0094b1eb1
[INFO] testing skriems/aoc against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskriems%2Faoc" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/skriems/aoc on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/skriems/aoc
[INFO] finished tweaking git repo https://github.com/skriems/aoc
[INFO] tweaked toml for git repo https://github.com/skriems/aoc written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/skriems/aoc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64e0c51020af84c0eb852363f0f2ee0a714f9ba8b37a2ed0f84271e02021e6f8
[INFO] running `Command { std: "docker" "start" "-a" "64e0c51020af84c0eb852363f0f2ee0a714f9ba8b37a2ed0f84271e02021e6f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64e0c51020af84c0eb852363f0f2ee0a714f9ba8b37a2ed0f84271e02021e6f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64e0c51020af84c0eb852363f0f2ee0a714f9ba8b37a2ed0f84271e02021e6f8", kill_on_drop: false }`
[INFO] [stdout] 64e0c51020af84c0eb852363f0f2ee0a714f9ba8b37a2ed0f84271e02021e6f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f778e36fe52d6e7e57b7e6fdea23c81576578d6c29f15e7676e2ff56c4a3a8cb
[INFO] running `Command { std: "docker" "start" "-a" "f778e36fe52d6e7e57b7e6fdea23c81576578d6c29f15e7676e2ff56c4a3a8cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling aoc-2021 v0.1.0 (/opt/rustwide/workdir/2021)
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]   --> 2021/src/day4.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn part2(input: &str) {
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> 2021/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(array_windows)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc-2021` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f778e36fe52d6e7e57b7e6fdea23c81576578d6c29f15e7676e2ff56c4a3a8cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f778e36fe52d6e7e57b7e6fdea23c81576578d6c29f15e7676e2ff56c4a3a8cb", kill_on_drop: false }`
[INFO] [stdout] f778e36fe52d6e7e57b7e6fdea23c81576578d6c29f15e7676e2ff56c4a3a8cb