[INFO] updating cached repository https://github.com/pistacchio/advent-of-code-2015-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4560bdf5a5b8b6302f5822d72810d1e6343df804
[INFO] checking pistacchio/advent-of-code-2015-rust against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpistacchio%2Fadvent-of-code-2015-rust" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pistacchio/advent-of-code-2015-rust on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pistacchio/advent-of-code-2015-rust
[INFO] finished tweaking git repo https://github.com/pistacchio/advent-of-code-2015-rust
[INFO] tweaked toml for git repo https://github.com/pistacchio/advent-of-code-2015-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/pistacchio/advent-of-code-2015-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 25c51806593475dd085e25f1320ead0d8135160f3bca15e425a5759b32d660e5
[INFO] running `"docker" "start" "-a" "25c51806593475dd085e25f1320ead0d8135160f3bca15e425a5759b32d660e5"`
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking divisors v0.1.5
[INFO] [stderr]     Checking permutator v0.3.3
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking aoc-2015 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/day_18.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::{iter, thread, time};
[INFO] [stderr]   |                 ^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `TEST_GRID`
[INFO] [stderr]   --> src/day_18.rs:8:1
[INFO] [stderr]    |
[INFO] [stderr] 8  | / const TEST_GRID: &str = r#".#.#.#
[INFO] [stderr] 9  | | ...##.
[INFO] [stderr] 10 | | #....#
[INFO] [stderr] 11 | | ..#...
[INFO] [stderr] 12 | | #.#..#
[INFO] [stderr] 13 | | ####.."#;
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `TEST_REPLACEMENTS`
[INFO] [stderr]  --> src/day_19.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | / const TEST_REPLACEMENTS: &str = r#"H => HO
[INFO] [stderr] 8 | | H => OH
[INFO] [stderr] 9 | | O => HH"#;
[INFO] [stderr]   | |__________^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.26s
[INFO] running `"docker" "inspect" "25c51806593475dd085e25f1320ead0d8135160f3bca15e425a5759b32d660e5"`
[INFO] running `"docker" "rm" "-f" "25c51806593475dd085e25f1320ead0d8135160f3bca15e425a5759b32d660e5"`
[INFO] [stdout] 25c51806593475dd085e25f1320ead0d8135160f3bca15e425a5759b32d660e5