[INFO] cloning repository https://github.com/kal39/connect_4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kal39/connect_4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkal39%2Fconnect_4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkal39%2Fconnect_4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1c1013412376e0126da5a2cde7e1bca99459570
[INFO] testing kal39/connect_4 against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkal39%2Fconnect_4" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kal39/connect_4 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kal39/connect_4
[INFO] finished tweaking git repo https://github.com/kal39/connect_4
[INFO] tweaked toml for git repo https://github.com/kal39/connect_4 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/kal39/connect_4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23740c0cf591273aebaf247ea7b3936199e895c1d57f3c50e09068d20cc9ee7f
[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" "23740c0cf591273aebaf247ea7b3936199e895c1d57f3c50e09068d20cc9ee7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23740c0cf591273aebaf247ea7b3936199e895c1d57f3c50e09068d20cc9ee7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23740c0cf591273aebaf247ea7b3936199e895c1d57f3c50e09068d20cc9ee7f", kill_on_drop: false }`
[INFO] [stdout] 23740c0cf591273aebaf247ea7b3936199e895c1d57f3c50e09068d20cc9ee7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef40c66208214eff0e6da871a2c320c84cb6eb900c8dc46a484caa062c599cf6
[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" "ef40c66208214eff0e6da871a2c320c84cb6eb900c8dc46a484caa062c599cf6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.113
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling connect_4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `play_human_vs_bot_game`
[INFO] [stdout]   --> src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn play_human_vs_bot_game() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `train`
[INFO] [stdout]   --> src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn train() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ga/individual.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(chromosome_count: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_fitness`
[INFO] [stdout]   --> src/ga/individual.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn add_fitness(&mut self, value: i32) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `crossover`
[INFO] [stdout]   --> src/ga/individual.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn crossover(&self, other: Individual) -> Individual {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutate`
[INFO] [stdout]   --> src/ga/individual.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn mutate(&mut self, chance: f64) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ga/population.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(population_size: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evolve`
[INFO] [stdout]   --> src/ga/population.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn evolve(
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `calculate_fitness`
[INFO] [stdout]   --> src/ga/population.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn calculate_fitness(&mut self, iterations: i32, max_depth: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `select`
[INFO] [stdout]   --> src/ga/population.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn select(&mut self, size: i32) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `crossover`
[INFO] [stdout]   --> src/ga/population.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub fn crossover(&mut self, size: i32) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutate`
[INFO] [stdout]    --> src/ga/population.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn mutate(&mut self, chance: f64) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rand_individual`
[INFO] [stdout]    --> src/ga/population.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn rand_individual(&mut self) -> Individual {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/game/human.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `duel`
[INFO] [stdout]   --> src/game/main_loop.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn duel(mut players: (impl Player, impl Player)) -> (i32, i32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.80s
[INFO] running `Command { std: "docker" "inspect" "ef40c66208214eff0e6da871a2c320c84cb6eb900c8dc46a484caa062c599cf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef40c66208214eff0e6da871a2c320c84cb6eb900c8dc46a484caa062c599cf6", kill_on_drop: false }`
[INFO] [stdout] ef40c66208214eff0e6da871a2c320c84cb6eb900c8dc46a484caa062c599cf6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] 1c89442411f0a452c05c91f6da77d54f317cf80c9434c6b47ec31e2a73e633c3
[INFO] running `Command { std: "docker" "start" "-a" "1c89442411f0a452c05c91f6da77d54f317cf80c9434c6b47ec31e2a73e633c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling connect_4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `play_human_vs_bot_game`
[INFO] [stdout]   --> src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn play_human_vs_bot_game() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `train`
[INFO] [stdout]   --> src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn train() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ga/individual.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(chromosome_count: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_fitness`
[INFO] [stdout]   --> src/ga/individual.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn add_fitness(&mut self, value: i32) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `crossover`
[INFO] [stdout]   --> src/ga/individual.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn crossover(&self, other: Individual) -> Individual {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutate`
[INFO] [stdout]   --> src/ga/individual.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn mutate(&mut self, chance: f64) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ga/population.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(population_size: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evolve`
[INFO] [stdout]   --> src/ga/population.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn evolve(
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `calculate_fitness`
[INFO] [stdout]   --> src/ga/population.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn calculate_fitness(&mut self, iterations: i32, max_depth: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `select`
[INFO] [stdout]   --> src/ga/population.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn select(&mut self, size: i32) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `crossover`
[INFO] [stdout]   --> src/ga/population.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub fn crossover(&mut self, size: i32) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutate`
[INFO] [stdout]    --> src/ga/population.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn mutate(&mut self, chance: f64) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rand_individual`
[INFO] [stdout]    --> src/ga/population.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fn rand_individual(&mut self) -> Individual {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/game/human.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `duel`
[INFO] [stdout]   --> src/game/main_loop.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn duel(mut players: (impl Player, impl Player)) -> (i32, i32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.32s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/connect_4-1da7abd466e07bf2)
[INFO] running `Command { std: "docker" "inspect" "1c89442411f0a452c05c91f6da77d54f317cf80c9434c6b47ec31e2a73e633c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c89442411f0a452c05c91f6da77d54f317cf80c9434c6b47ec31e2a73e633c3", kill_on_drop: false }`
[INFO] [stdout] 1c89442411f0a452c05c91f6da77d54f317cf80c9434c6b47ec31e2a73e633c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f691f36c6711c64142811be731a9db9225ecc4a87af1308b52a32960fc9c7f0c
[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" "f691f36c6711c64142811be731a9db9225ecc4a87af1308b52a32960fc9c7f0c", kill_on_drop: false }`
[INFO] [stdout] 
[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: function is never used: `play_human_vs_bot_game`
[INFO] [stderr]   --> src/main.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn play_human_vs_bot_game() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `train`
[INFO] [stderr]   --> src/main.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn train() {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/ga/individual.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(chromosome_count: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_fitness`
[INFO] [stderr]   --> src/ga/individual.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn add_fitness(&mut self, value: i32) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `crossover`
[INFO] [stderr]   --> src/ga/individual.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn crossover(&self, other: Individual) -> Individual {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `mutate`
[INFO] [stderr]   --> src/ga/individual.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn mutate(&mut self, chance: f64) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/ga/population.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new(population_size: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `evolve`
[INFO] [stderr]   --> src/ga/population.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn evolve(
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `calculate_fitness`
[INFO] [stderr]   --> src/ga/population.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn calculate_fitness(&mut self, iterations: i32, max_depth: i32) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `select`
[INFO] [stderr]   --> src/ga/population.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn select(&mut self, size: i32) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `crossover`
[INFO] [stderr]   --> src/ga/population.rs:98:9
[INFO] [stderr]    |
[INFO] [stderr] 98 |     pub fn crossover(&mut self, size: i32) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `mutate`
[INFO] [stderr]    --> src/ga/population.rs:106:9
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn mutate(&mut self, chance: f64) {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `rand_individual`
[INFO] [stderr]    --> src/ga/population.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn rand_individual(&mut self) -> Individual {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/game/human.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `duel`
[INFO] [stderr]   --> src/game/main_loop.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn duel(mut players: (impl Player, impl Player)) -> (i32, i32) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `connect_4` (bin "connect_4" test) generated 15 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/connect_4-1da7abd466e07bf2)
[INFO] running `Command { std: "docker" "inspect" "f691f36c6711c64142811be731a9db9225ecc4a87af1308b52a32960fc9c7f0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f691f36c6711c64142811be731a9db9225ecc4a87af1308b52a32960fc9c7f0c", kill_on_drop: false }`
[INFO] [stdout] f691f36c6711c64142811be731a9db9225ecc4a87af1308b52a32960fc9c7f0c