[INFO] cloning repository https://github.com/joshuacoles/Coursework-2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joshuacoles/Coursework-2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshuacoles%2FCoursework-2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshuacoles%2FCoursework-2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 425716e6bb139a7fc9cec94133dd075bcdf734cd
[INFO] testing joshuacoles/Coursework-2 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshuacoles%2FCoursework-2" "/workspace/builds/worker-46/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-46/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joshuacoles/Coursework-2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/joshuacoles/Coursework-2
[INFO] finished tweaking git repo https://github.com/joshuacoles/Coursework-2
[INFO] tweaked toml for git repo https://github.com/joshuacoles/Coursework-2 written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] crate git repo https://github.com/joshuacoles/Coursework-2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded array2d v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6534b7f5d01b7a68446eca0faa06d9bf7d0c0bee2684981dc6433b9974f1e679
[INFO] running `Command { std: "docker" "start" "-a" "6534b7f5d01b7a68446eca0faa06d9bf7d0c0bee2684981dc6433b9974f1e679", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6534b7f5d01b7a68446eca0faa06d9bf7d0c0bee2684981dc6433b9974f1e679", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6534b7f5d01b7a68446eca0faa06d9bf7d0c0bee2684981dc6433b9974f1e679", kill_on_drop: false }`
[INFO] [stdout] 6534b7f5d01b7a68446eca0faa06d9bf7d0c0bee2684981dc6433b9974f1e679
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dbd3b32cab1814402036d1af5f4bf4fa46f8431bf7c11f45a7b49c91b49de361
[INFO] running `Command { std: "docker" "start" "-a" "dbd3b32cab1814402036d1af5f4bf4fa46f8431bf7c11f45a7b49c91b49de361", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling array2d v0.2.1
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling cw-2-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `random_indexes_in_range`
[INFO] [stdout]   --> src/q1a.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn random_indexes_in_range(range: Range<usize>, expected: usize) -> HashSet<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/q1a.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(lx: usize, ly: usize, n: usize) -> Grid {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/q1a.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Insulator`
[INFO] [stdout]   --> src/q2a.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Insulator,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Conductor`
[INFO] [stdout]   --> src/q2a.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Conductor,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SuperConductor`
[INFO] [stdout]   --> src/q2a.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     SuperConductor,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `random_indexes_in_range`
[INFO] [stdout]   --> src/q2a.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn random_indexes_in_range(range: Range<usize>, expected: usize) -> HashSet<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/q2a.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new(lx: usize, ly: usize, n: usize, p_super: f64) -> Grid {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `directly_reachable_from`
[INFO] [stdout]   --> src/q2a.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn directly_reachable_from(&self, pos: (usize, usize)) -> HashSet<Pos> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next_to_process`
[INFO] [stdout]    --> src/q2a.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 |     next_to_process: HashSet<Pos>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/q2a.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn new(grid: Grid) -> ClusterFinder {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search`
[INFO] [stdout]    --> src/q2a.rs:145:8
[INFO] [stdout]     |
[INFO] [stdout] 145 |     fn search(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `step`
[INFO] [stdout]    --> src/q2a.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn step(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]    --> src/q2a.rs:192:8
[INFO] [stdout]     |
[INFO] [stdout] 192 | pub fn main() {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cluster`
[INFO] [stdout]   --> src/q2b/cluster_finder.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn cluster(&self) -> &HashSet<Pos> {
[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 7.18s
[INFO] running `Command { std: "docker" "inspect" "dbd3b32cab1814402036d1af5f4bf4fa46f8431bf7c11f45a7b49c91b49de361", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbd3b32cab1814402036d1af5f4bf4fa46f8431bf7c11f45a7b49c91b49de361", kill_on_drop: false }`
[INFO] [stdout] dbd3b32cab1814402036d1af5f4bf4fa46f8431bf7c11f45a7b49c91b49de361
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5b3eaebaf1e47726cc87f308ede95e4eb303ea3f9e62d2e575773138e39aac5
[INFO] running `Command { std: "docker" "start" "-a" "f5b3eaebaf1e47726cc87f308ede95e4eb303ea3f9e62d2e575773138e39aac5", kill_on_drop: false }`
[INFO] [stderr]    Compiling cw-2-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `random_indexes_in_range`
[INFO] [stdout]   --> src/q1a.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn random_indexes_in_range(range: Range<usize>, expected: usize) -> HashSet<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/q1a.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(lx: usize, ly: usize, n: usize) -> Grid {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/q1a.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Insulator`
[INFO] [stdout]   --> src/q2a.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Insulator,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Conductor`
[INFO] [stdout]   --> src/q2a.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Conductor,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SuperConductor`
[INFO] [stdout]   --> src/q2a.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     SuperConductor,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `random_indexes_in_range`
[INFO] [stdout]   --> src/q2a.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn random_indexes_in_range(range: Range<usize>, expected: usize) -> HashSet<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/q2a.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new(lx: usize, ly: usize, n: usize, p_super: f64) -> Grid {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `directly_reachable_from`
[INFO] [stdout]   --> src/q2a.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn directly_reachable_from(&self, pos: (usize, usize)) -> HashSet<Pos> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next_to_process`
[INFO] [stdout]    --> src/q2a.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 |     next_to_process: HashSet<Pos>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/q2a.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn new(grid: Grid) -> ClusterFinder {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search`
[INFO] [stdout]    --> src/q2a.rs:145:8
[INFO] [stdout]     |
[INFO] [stdout] 145 |     fn search(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `step`
[INFO] [stdout]    --> src/q2a.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn step(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]    --> src/q2a.rs:192:8
[INFO] [stdout]     |
[INFO] [stdout] 192 | pub fn main() {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cluster`
[INFO] [stdout]   --> src/q2b/cluster_finder.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn cluster(&self) -> &HashSet<Pos> {
[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 0.94s
[INFO] running `Command { std: "docker" "inspect" "f5b3eaebaf1e47726cc87f308ede95e4eb303ea3f9e62d2e575773138e39aac5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5b3eaebaf1e47726cc87f308ede95e4eb303ea3f9e62d2e575773138e39aac5", kill_on_drop: false }`
[INFO] [stdout] f5b3eaebaf1e47726cc87f308ede95e4eb303ea3f9e62d2e575773138e39aac5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a9e1b2150543cdb15d12a0f8b14dde3d79bbc395d54ea9b3f594efd1faadf969
[INFO] running `Command { std: "docker" "start" "-a" "a9e1b2150543cdb15d12a0f8b14dde3d79bbc395d54ea9b3f594efd1faadf969", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `random_indexes_in_range`
[INFO] [stderr]   --> src/q1a.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn random_indexes_in_range(range: Range<usize>, expected: usize) -> HashSet<usize> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/q1a.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn new(lx: usize, ly: usize, n: usize) -> Grid {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> src/q1a.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Insulator`
[INFO] [stderr]   --> src/q2a.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Insulator,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Conductor`
[INFO] [stderr]   --> src/q2a.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Conductor,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SuperConductor`
[INFO] [stderr]   --> src/q2a.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     SuperConductor,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `random_indexes_in_range`
[INFO] [stderr]   --> src/q2a.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn random_indexes_in_range(range: Range<usize>, expected: usize) -> HashSet<usize> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/q2a.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn new(lx: usize, ly: usize, n: usize, p_super: f64) -> Grid {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `directly_reachable_from`
[INFO] [stderr]   --> src/q2a.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn directly_reachable_from(&self, pos: (usize, usize)) -> HashSet<Pos> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `next_to_process`
[INFO] [stderr]    --> src/q2a.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     next_to_process: HashSet<Pos>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/q2a.rs:130:8
[INFO] [stderr]     |
[INFO] [stderr] 130 |     fn new(grid: Grid) -> ClusterFinder {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `search`
[INFO] [stderr]    --> src/q2a.rs:145:8
[INFO] [stderr]     |
[INFO] [stderr] 145 |     fn search(&mut self) {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `step`
[INFO] [stderr]    --> src/q2a.rs:151:8
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn step(&mut self) {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]    --> src/q2a.rs:192:8
[INFO] [stderr]     |
[INFO] [stderr] 192 | pub fn main() {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cluster`
[INFO] [stderr]   --> src/q2b/cluster_finder.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn cluster(&self) -> &HashSet<Pos> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `cw-2-rs` (bin "cw-2-rs" test) generated 15 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cw_2_rs-dd38dfc039e326f4)
[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] running `Command { std: "docker" "inspect" "a9e1b2150543cdb15d12a0f8b14dde3d79bbc395d54ea9b3f594efd1faadf969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9e1b2150543cdb15d12a0f8b14dde3d79bbc395d54ea9b3f594efd1faadf969", kill_on_drop: false }`
[INFO] [stdout] a9e1b2150543cdb15d12a0f8b14dde3d79bbc395d54ea9b3f594efd1faadf969