[INFO] cloning repository https://github.com/Knight-Ops/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/Knight-Ops/advent-of-code-2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKnight-Ops%2Fadvent-of-code-2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKnight-Ops%2Fadvent-of-code-2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6431bf9245bbd641bb9f615abd7ad4919f228364
[INFO] testing Knight-Ops/advent-of-code-2021 against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKnight-Ops%2Fadvent-of-code-2021" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Knight-Ops/advent-of-code-2021 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Knight-Ops/advent-of-code-2021
[INFO] finished tweaking git repo https://github.com/Knight-Ops/advent-of-code-2021
[INFO] tweaked toml for git repo https://github.com/Knight-Ops/advent-of-code-2021 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Knight-Ops/advent-of-code-2021 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75e146c1d5f6f79436a0a5e1424de065fb411e1d43d7aee867faa8158ed9c21b
[INFO] running `Command { std: "docker" "start" "-a" "75e146c1d5f6f79436a0a5e1424de065fb411e1d43d7aee867faa8158ed9c21b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75e146c1d5f6f79436a0a5e1424de065fb411e1d43d7aee867faa8158ed9c21b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75e146c1d5f6f79436a0a5e1424de065fb411e1d43d7aee867faa8158ed9c21b", kill_on_drop: false }`
[INFO] [stdout] 75e146c1d5f6f79436a0a5e1424de065fb411e1d43d7aee867faa8158ed9c21b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68ed6dc80a0922604db7e82b1d9b2ad7db409b9f919c3662c4561d126223f522
[INFO] running `Command { std: "docker" "start" "-a" "68ed6dc80a0922604db7e82b1d9b2ad7db409b9f919c3662c4561d126223f522", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling advent-of-code-2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fnv::FnvHashSet`
[INFO] [stdout]  --> src/day15/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use fnv::FnvHashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/day15/mod.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     for y in 0..5 {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/day15/mod.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |         for x in 0..5 {}
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `type_id`
[INFO] [stdout]    --> src/day16/mod.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 |     type_id: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings 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 `advent-of-code-2021` due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "68ed6dc80a0922604db7e82b1d9b2ad7db409b9f919c3662c4561d126223f522", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68ed6dc80a0922604db7e82b1d9b2ad7db409b9f919c3662c4561d126223f522", kill_on_drop: false }`
[INFO] [stdout] 68ed6dc80a0922604db7e82b1d9b2ad7db409b9f919c3662c4561d126223f522