[INFO] updating cached repository https://github.com/csauve/slughorn
[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] [stderr] From https://github.com/csauve/slughorn
[INFO] [stderr]  * [new branch]      better-lookahead -> better-lookahead
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8acecc745ce5cd1d567b815b6262779f2f6752ee
[INFO] checking csauve/slughorn against try#3738e44c8fffe9e1fdfda9304a4df74ce7b29152 for pr-68746
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcsauve%2Fslughorn" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/csauve/slughorn on toolchain 3738e44c8fffe9e1fdfda9304a4df74ce7b29152
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3738e44c8fffe9e1fdfda9304a4df74ce7b29152" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/csauve/slughorn
[INFO] finished tweaking git repo https://github.com/csauve/slughorn
[INFO] tweaked toml for git repo https://github.com/csauve/slughorn written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/csauve/slughorn already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3738e44c8fffe9e1fdfda9304a4df74ce7b29152" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+3738e44c8fffe9e1fdfda9304a4df74ce7b29152" "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] 0429704a70d2c07ae6f987699fa33e711cbd3a1fc0a2ffc824cf1ff48ae37161
[INFO] running `"docker" "start" "-a" "0429704a70d2c07ae6f987699fa33e711cbd3a1fc0a2ffc824cf1ff48ae37161"`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]     Checking pin-project-lite v0.1.2
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking tokio v0.2.11
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking pin-project v0.4.6
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking hyper v0.13.1
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking bookworm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `linear`
[INFO] [stderr]   --> src/game/offset.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn linear(self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `abs`
[INFO] [stderr]   --> src/game/offset.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn abs(&self) -> Offset {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/game/path.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new() -> Path {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_bounds`
[INFO] [stderr]   --> src/game/path.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn get_bounds(&self) -> Option<(Coord, Coord)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `slide_end`
[INFO] [stderr]   --> src/game/path.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn slide_end(&mut self, offset: Offset) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_start`
[INFO] [stderr]   --> src/game/path.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     pub fn pop_start(&mut self) -> Option<Coord> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `end`
[INFO] [stderr]    --> src/game/path.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 |     pub fn end(&self) -> Option<Coord> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tail`
[INFO] [stderr]   --> src/game/snake.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn tail(&self) -> Coord {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_snake_dist_matrix`
[INFO] [stderr]    --> src/game/board.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn get_snake_dist_matrix(&self) -> HashMap<(usize, usize), UnitAbs> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `enemies`
[INFO] [stderr]    --> src/game/board.rs:365:5
[INFO] [stderr]     |
[INFO] [stderr] 365 |     pub fn enemies(&self) -> &[Snake] {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `abs`
[INFO] [stderr]   --> src/game/offset.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn abs(&self) -> Offset {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/game/path.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new() -> Path {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_bounds`
[INFO] [stderr]   --> src/game/path.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn get_bounds(&self) -> Option<(Coord, Coord)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_snake_dist_matrix`
[INFO] [stderr]    --> src/game/board.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn get_snake_dist_matrix(&self) -> HashMap<(usize, usize), UnitAbs> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_lookahead_best_dead_end`
[INFO] [stderr]    --> src/brain.rs:180:8
[INFO] [stderr]     |
[INFO] [stderr] 180 |     fn test_lookahead_best_dead_end() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 18s
[INFO] running `"docker" "inspect" "0429704a70d2c07ae6f987699fa33e711cbd3a1fc0a2ffc824cf1ff48ae37161"`
[INFO] running `"docker" "rm" "-f" "0429704a70d2c07ae6f987699fa33e711cbd3a1fc0a2ffc824cf1ff48ae37161"`
[INFO] [stdout] 0429704a70d2c07ae6f987699fa33e711cbd3a1fc0a2ffc824cf1ff48ae37161