[INFO] cloning repository https://github.com/hsimpson/aoc2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hsimpson/aoc2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsimpson%2Faoc2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsimpson%2Faoc2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf5acfa70dfef8a5719e30562da52a211658a364
[INFO] checking hsimpson/aoc2021 against master#4eb62535fc12dd1a63fd43a4173e224e79313c4d for pr-158816
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsimpson%2Faoc2021" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hsimpson/aoc2021
[INFO] finished tweaking git repo https://github.com/hsimpson/aoc2021
[INFO] tweaked toml for git repo https://github.com/hsimpson/aoc2021 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hsimpson/aoc2021 on toolchain 4eb62535fc12dd1a63fd43a4173e224e79313c4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hsimpson/aoc2021 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pathfinding v3.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4
[INFO] running `Command { std: "docker" "start" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking integer-sqrt v0.1.5
[INFO] [stderr]     Checking petgraph v0.6.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking pathfinding v3.0.5
[INFO] [stderr]     Checking aoc2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day12/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let mut visited: HashMap<usize, bool> = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `graph`
[INFO] [stdout]   --> src/day12/mod.rs:58:14
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn test_path(graph: &Graph, path: &mut Vec<usize>) {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_graph`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/day12/mod.rs:58:29
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn test_path(graph: &Graph, path: &mut Vec<usize>) {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visited`
[INFO] [stdout]   --> src/day12/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let mut visited: HashMap<usize, bool> = HashMap::new();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visited`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day12/mod.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut valid_paths = Vec::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day12/mod.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut current_path: Vec<String> = Vec::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `graph`
[INFO] [stdout]   --> src/day12/mod.rs:62:25
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn find_all_valid_paths(graph: &mut Graph, start_id: usize, end_id: usize) -> Vec<Vec<String>> {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_graph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_id`
[INFO] [stdout]   --> src/day12/mod.rs:62:61
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn find_all_valid_paths(graph: &mut Graph, start_id: usize, end_id: usize) -> Vec<Vec<String>> {
[INFO] [stdout]    |                                                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_path`
[INFO] [stdout]   --> src/day12/mod.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut current_path: Vec<String> = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `kind` are never read
[INFO] [stdout]   --> src/day12/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Cave {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 14 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 15 |     name: String,
[INFO] [stdout] 16 |     kind: CaveType,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_path` is never used
[INFO] [stdout]   --> src/day12/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn test_path(graph: &Graph, path: &mut Vec<usize>) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day12/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let mut visited: HashMap<usize, bool> = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `graph`
[INFO] [stdout]   --> src/day12/mod.rs:58:14
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn test_path(graph: &Graph, path: &mut Vec<usize>) {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_graph`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/day12/mod.rs:58:29
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn test_path(graph: &Graph, path: &mut Vec<usize>) {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visited`
[INFO] [stdout]   --> src/day12/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let mut visited: HashMap<usize, bool> = HashMap::new();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visited`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day12/mod.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut valid_paths = Vec::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day12/mod.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut current_path: Vec<String> = Vec::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `graph`
[INFO] [stdout]   --> src/day12/mod.rs:62:25
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn find_all_valid_paths(graph: &mut Graph, start_id: usize, end_id: usize) -> Vec<Vec<String>> {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_graph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_id`
[INFO] [stdout]   --> src/day12/mod.rs:62:61
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn find_all_valid_paths(graph: &mut Graph, start_id: usize, end_id: usize) -> Vec<Vec<String>> {
[INFO] [stdout]    |                                                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_path`
[INFO] [stdout]   --> src/day12/mod.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut current_path: Vec<String> = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `kind` are never read
[INFO] [stdout]   --> src/day12/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Cave {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 14 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 15 |     name: String,
[INFO] [stdout] 16 |     kind: CaveType,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_path` is never used
[INFO] [stdout]   --> src/day12/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn test_path(graph: &Graph, path: &mut Vec<usize>) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.76s
[INFO] running `Command { std: "docker" "inspect" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4", kill_on_drop: false }`
[INFO] [stdout] affd043083df52da36205d505659c6761a3c0a640bb6ca7680761276f680d5e4
