[INFO] cloning repository https://github.com/alexlai97/snake-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexlai97/snake-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsnake-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsnake-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2a2cbe97eb824aacf2d030d6bc5ee731a1aa102
[INFO] testing alexlai97/snake-rust against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexlai97%2Fsnake-rust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexlai97/snake-rust on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alexlai97/snake-rust
[INFO] finished tweaking git repo https://github.com/alexlai97/snake-rust
[INFO] tweaked toml for git repo https://github.com/alexlai97/snake-rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/alexlai97/snake-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_os v0.1.0
[INFO] [stderr]   Downloaded rand v0.6.3
[INFO] [stderr]   Downloaded ncurses v5.98.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 60cb6d3ac0de05f0dc5c091cdb043e8c56e7adf74c6034475127e1695a1ca0c1
[INFO] running `Command { std: "docker" "start" "-a" "60cb6d3ac0de05f0dc5c091cdb043e8c56e7adf74c6034475127e1695a1ca0c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60cb6d3ac0de05f0dc5c091cdb043e8c56e7adf74c6034475127e1695a1ca0c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60cb6d3ac0de05f0dc5c091cdb043e8c56e7adf74c6034475127e1695a1ca0c1", kill_on_drop: false }`
[INFO] [stdout] 60cb6d3ac0de05f0dc5c091cdb043e8c56e7adf74c6034475127e1695a1ca0c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86908a002a4c65b30258e9d08fb7a78ced1fd029c4df60f424e0eab354fea9cc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "86908a002a4c65b30258e9d08fb7a78ced1fd029c4df60f424e0eab354fea9cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.3
[INFO] [stderr]    Compiling ncurses v5.98.0
[INFO] [stderr]    Compiling rand_os v0.1.0
[INFO] [stderr]    Compiling snake-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Snake_body` should have an upper camel case name
[INFO] [stdout]   --> src/game.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Snake_body,
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakeBody`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body_reversed`
[INFO] [stdout]  --> src/snake.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     body_reversed: Vec<(u32, u32)>, // tail is index 0, head is len - 1
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `difficulty`
[INFO] [stdout]   --> src/game.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     difficulty: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `grid`
[INFO] [stdout]   --> src/game.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     grid: Vec<Vec<Cell>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_cell`
[INFO] [stdout]   --> src/game.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn set_cell(&mut self, y: u32, x: u32, cell: Cell) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_cell`
[INFO] [stdout]   --> src/game.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_cell(&self, y: u32, x:u32) -> & Cell {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/game.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn is_full(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generate_apple`
[INFO] [stdout]   --> src/game.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn generate_apple(&mut self) -> Option<(u32, u32)>{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Snake_body`
[INFO] [stdout]   --> src/game.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Snake_body,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Apple`
[INFO] [stdout]   --> src/game.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 77 |     Apple,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_board_win`
[INFO] [stdout]    --> src/game.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn update_board_win(&self, cell: (u32, u32), ch: char) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.67s
[INFO] running `Command { std: "docker" "inspect" "86908a002a4c65b30258e9d08fb7a78ced1fd029c4df60f424e0eab354fea9cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86908a002a4c65b30258e9d08fb7a78ced1fd029c4df60f424e0eab354fea9cc", kill_on_drop: false }`
[INFO] [stdout] 86908a002a4c65b30258e9d08fb7a78ced1fd029c4df60f424e0eab354fea9cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b6c89c898cc347c107774da2827b1a85923e14086206eda5660617f394ac638d
[INFO] running `Command { std: "docker" "start" "-a" "b6c89c898cc347c107774da2827b1a85923e14086206eda5660617f394ac638d", kill_on_drop: false }`
[INFO] [stderr]    Compiling snake-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Snake_body` should have an upper camel case name
[INFO] [stdout]   --> src/game.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Snake_body,
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakeBody`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body_reversed`
[INFO] [stdout]  --> src/snake.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     body_reversed: Vec<(u32, u32)>, // tail is index 0, head is len - 1
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `difficulty`
[INFO] [stdout]   --> src/game.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     difficulty: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `grid`
[INFO] [stdout]   --> src/game.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     grid: Vec<Vec<Cell>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_cell`
[INFO] [stdout]   --> src/game.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn set_cell(&mut self, y: u32, x: u32, cell: Cell) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_cell`
[INFO] [stdout]   --> src/game.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_cell(&self, y: u32, x:u32) -> & Cell {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/game.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn is_full(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generate_apple`
[INFO] [stdout]   --> src/game.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn generate_apple(&mut self) -> Option<(u32, u32)>{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Snake_body`
[INFO] [stdout]   --> src/game.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Snake_body,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Apple`
[INFO] [stdout]   --> src/game.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 77 |     Apple,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_board_win`
[INFO] [stdout]    --> src/game.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn update_board_win(&self, cell: (u32, u32), ch: char) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Snake_body` should have an upper camel case name
[INFO] [stdout]   --> src/game.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Snake_body,
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakeBody`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body_reversed`
[INFO] [stdout]  --> src/snake.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     body_reversed: Vec<(u32, u32)>, // tail is index 0, head is len - 1
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `difficulty`
[INFO] [stdout]   --> src/game.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     difficulty: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_cell`
[INFO] [stdout]   --> src/game.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_cell(&self, y: u32, x:u32) -> & Cell {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/game.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn is_full(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generate_apple`
[INFO] [stdout]   --> src/game.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn generate_apple(&mut self) -> Option<(u32, u32)>{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Snake_body`
[INFO] [stdout]   --> src/game.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Snake_body,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_board_win`
[INFO] [stdout]    --> src/game.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn update_board_win(&self, cell: (u32, u32), ch: char) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "b6c89c898cc347c107774da2827b1a85923e14086206eda5660617f394ac638d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6c89c898cc347c107774da2827b1a85923e14086206eda5660617f394ac638d", kill_on_drop: false }`
[INFO] [stdout] b6c89c898cc347c107774da2827b1a85923e14086206eda5660617f394ac638d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d9c3c2238e4ef80862e58dfc34ddab905f67ee2f34efd24de4dd415f3d817194
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d9c3c2238e4ef80862e58dfc34ddab905f67ee2f34efd24de4dd415f3d817194", kill_on_drop: false }`
[INFO] [stderr] warning: variant `Snake_body` should have an upper camel case name
[INFO] [stderr]   --> src/game.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     Snake_body,
[INFO] [stderr]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakeBody`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `body_reversed`
[INFO] [stderr]  --> src/snake.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     body_reversed: Vec<(u32, u32)>, // tail is index 0, head is len - 1
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `difficulty`
[INFO] [stderr]   --> src/game.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     difficulty: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `grid`
[INFO] [stderr]   --> src/game.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     grid: Vec<Vec<Cell>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_cell`
[INFO] [stderr]   --> src/game.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn set_cell(&mut self, y: u32, x: u32, cell: Cell) {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_cell`
[INFO] [stderr]   --> src/game.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn get_cell(&self, y: u32, x:u32) -> & Cell {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_full`
[INFO] [stderr]   --> src/game.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 52 |     fn is_full(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `generate_apple`
[INFO] [stderr]   --> src/game.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn generate_apple(&mut self) -> Option<(u32, u32)>{
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Snake_body`
[INFO] [stderr]   --> src/game.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     Snake_body,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Apple`
[INFO] [stderr]   --> src/game.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     Apple,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `update_board_win`
[INFO] [stderr]    --> src/game.rs:121:8
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn update_board_win(&self, cell: (u32, u32), ch: char) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `snake-rust` (lib) generated 11 warnings
[INFO] [stderr] warning: `snake-rust` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/snake_rust-9c59dd51f649f817)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test game::tests::grid_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/snake_rust-ad071cee83e5fca2)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests snake-rust
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: variant `Snake_body` should have an upper camel case name
[INFO] [stderr]   --> /opt/rustwide/workdir/src/game.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     Snake_body,
[INFO] [stderr]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakeBody`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stdout] running 0 tests
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d9c3c2238e4ef80862e58dfc34ddab905f67ee2f34efd24de4dd415f3d817194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c3c2238e4ef80862e58dfc34ddab905f67ee2f34efd24de4dd415f3d817194", kill_on_drop: false }`
[INFO] [stdout] d9c3c2238e4ef80862e58dfc34ddab905f67ee2f34efd24de4dd415f3d817194