[INFO] cloning repository https://github.com/fireyang/advent_of_code_2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fireyang/advent_of_code_2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffireyang%2Fadvent_of_code_2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffireyang%2Fadvent_of_code_2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d32a9fefe936fb14a83038fe921ddb58f5678d27
[INFO] checking fireyang/advent_of_code_2020 against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffireyang%2Fadvent_of_code_2020" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fireyang/advent_of_code_2020 on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fireyang/advent_of_code_2020
[INFO] finished tweaking git repo https://github.com/fireyang/advent_of_code_2020
[INFO] tweaked toml for git repo https://github.com/fireyang/advent_of_code_2020 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/fireyang/advent_of_code_2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f43f5f00dbe4cdf9740da7728c5604925f3b031bf5d9b94b5a8e39f95dc35b2
[INFO] running `Command { std: "docker" "start" "-a" "2f43f5f00dbe4cdf9740da7728c5604925f3b031bf5d9b94b5a8e39f95dc35b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f43f5f00dbe4cdf9740da7728c5604925f3b031bf5d9b94b5a8e39f95dc35b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f43f5f00dbe4cdf9740da7728c5604925f3b031bf5d9b94b5a8e39f95dc35b2", kill_on_drop: false }`
[INFO] [stdout] 2f43f5f00dbe4cdf9740da7728c5604925f3b031bf5d9b94b5a8e39f95dc35b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d062c0bcde9e41f47e24d1b43ed4cc61d6ac55f6970726ae11fbd591aec5235
[INFO] running `Command { std: "docker" "start" "-a" "1d062c0bcde9e41f47e24d1b43ed4cc61d6ac55f6970726ae11fbd591aec5235", kill_on_drop: false }`
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking advent_of_code_2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rules`
[INFO] [stdout]   --> src/day19.rs:35:14
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn check(rules: HashMap<String, Vec<Vec<String>>>) -> i32 {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_rules`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rules`
[INFO] [stdout]   --> src/day19.rs:35:14
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn check(rules: HashMap<String, Vec<Vec<String>>>) -> i32 {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_rules`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `check`
[INFO] [stdout]   --> src/day19.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn check(rules: HashMap<String, Vec<Vec<String>>>) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `check`
[INFO] [stdout]   --> src/day19.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn check(rules: HashMap<String, Vec<Vec<String>>>) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.22s
[INFO] running `Command { std: "docker" "inspect" "1d062c0bcde9e41f47e24d1b43ed4cc61d6ac55f6970726ae11fbd591aec5235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d062c0bcde9e41f47e24d1b43ed4cc61d6ac55f6970726ae11fbd591aec5235", kill_on_drop: false }`
[INFO] [stdout] 1d062c0bcde9e41f47e24d1b43ed4cc61d6ac55f6970726ae11fbd591aec5235