[INFO] cloning repository https://github.com/erewok/milos-mazes-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erewok/milos-mazes-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferewok%2Fmilos-mazes-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferewok%2Fmilos-mazes-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b10c30fb3e0d3c0912195491a3769949ee15527c
[INFO] checking erewok/milos-mazes-rs against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferewok%2Fmilos-mazes-rs" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erewok/milos-mazes-rs on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/erewok/milos-mazes-rs
[INFO] finished tweaking git repo https://github.com/erewok/milos-mazes-rs
[INFO] tweaked toml for git repo https://github.com/erewok/milos-mazes-rs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/erewok/milos-mazes-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cbf5672c0d84103501f374518d99e506156a01a8a065188367ccefa79a86df41
[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" "cbf5672c0d84103501f374518d99e506156a01a8a065188367ccefa79a86df41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cbf5672c0d84103501f374518d99e506156a01a8a065188367ccefa79a86df41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbf5672c0d84103501f374518d99e506156a01a8a065188367ccefa79a86df41", kill_on_drop: false }`
[INFO] [stdout] cbf5672c0d84103501f374518d99e506156a01a8a065188367ccefa79a86df41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--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] 746a4c1b323a02df23a08d958fa0d0eedf8fbe99c635491c2cdceacab784bd9d
[INFO] running `Command { std: "docker" "start" "-a" "746a4c1b323a02df23a08d958fa0d0eedf8fbe99c635491c2cdceacab784bd9d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling bitflags v1.2.1
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[INFO] [stderr]     Checking ppv-lite86 v0.2.10
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[INFO] [stderr]     Checking log v0.4.8
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[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
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[INFO] [stderr]     Checking petgraph v0.5.1
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[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking font-kit v0.7.1
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[INFO] [stderr]     Checking rand v0.8.3
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[INFO] [stderr]     Checking milos-mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `base_from_coords`
[INFO] [stdout]   --> src/graph.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |     use super::{base_from_coords, from_grid};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Config`, `Dot`
[INFO] [stdout]   --> src/graph.rs:76:25
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use petgraph::dot::{Dot, Config};
[INFO] [stdout]    |                         ^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `weight`
[INFO] [stdout]   --> src/algorithms.rs:97:21
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let weight = graph.node_weight(*nd);
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_weight`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/algorithms.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let mut node: Option<&NodeIndex> = all_node_indices.choose(&mut rand::thread_rng());
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `weight`
[INFO] [stdout]   --> src/algorithms.rs:97:21
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let weight = graph.node_weight(*nd);
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_weight`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/algorithms.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let mut node: Option<&NodeIndex> = all_node_indices.choose(&mut rand::thread_rng());
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `aldous_broder`
[INFO] [stdout]   --> src/algorithms.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | pub fn aldous_broder(graph: &mut UnGraph<(i32, i32), ()>) -> &mut UnGraph<(i32, i32), ()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `aldous_broder`
[INFO] [stdout]   --> src/algorithms.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | pub fn aldous_broder(graph: &mut UnGraph<(i32, i32), ()>) -> &mut UnGraph<(i32, i32), ()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `neighbor_cells`
[INFO] [stdout]   --> src/cell.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn neighbor_cells(coords: (i32, i32)) -> collections::HashMap<Direction, (i32, i32)> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]    --> src/grid.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn size(&self) -> i32 {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell`
[INFO] [stdout]    --> src/grid.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn random_cell(&self) -> &cell::Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell_cloned`
[INFO] [stdout]    --> src/grid.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub fn random_cell_cloned(&self) -> cell::Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell_mut`
[INFO] [stdout]    --> src/grid.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub fn random_cell_mut(&mut self) -> &mut cell::Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_png`
[INFO] [stdout]    --> src/grid.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn to_png(&self, cell_size: i32, filename: &str) -> Result<(), String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]    --> src/grid.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     next: Option<&'a cell::Cell>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `base_from_coords`
[INFO] [stdout]   --> src/graph.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn base_from_coords(rows: i32, columns: i32) -> UnGraph<(i32, i32), ()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Neighbors`
[INFO] [stdout]  --> src/hash_grid.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Neighbors {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_neighbor_coords`
[INFO] [stdout]   --> src/hash_grid.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn get_neighbor_coords(current: (i32, i32)) -> Neighbors {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/hash_grid.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn new(rows: i32, columns: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_cells`
[INFO] [stdout]   --> src/hash_grid.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn from_cells(cells: Vec<Vec<cell::Cell>>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `prepare_grid`
[INFO] [stdout]   --> src/hash_grid.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn prepare_grid(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `configure_cells`
[INFO] [stdout]   --> src/hash_grid.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn configure_cells(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_item`
[INFO] [stdout]    --> src/hash_grid.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout] 100 |     pub fn get_item(&self, row_col: (i32, i32)) -> Option<&cell::Cell> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_cell`
[INFO] [stdout]    --> src/hash_grid.rs:110:12
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn replace_cell(&mut self, cll: cell::Cell) -> Result<(), &str> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]    --> src/hash_grid.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn size(&self) -> i32 {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell`
[INFO] [stdout]    --> src/hash_grid.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn random_cell(&self) -> Option<&cell::Cell> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_png`
[INFO] [stdout]    --> src/hash_grid.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn to_png(&self, cell_size: i32, filename: &str) -> Result<(), String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     graph::to_png(&sidewinder_graph, 50, 12, 12, "sidewinder_from_graph.png");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/graph.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         new_grid.replace_cell(c1);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/graph.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         new_grid.replace_cell(c2);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/graph.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         new_grid.replace_cell(c3);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `neighbor_cells`
[INFO] [stdout]   --> src/cell.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn neighbor_cells(coords: (i32, i32)) -> collections::HashMap<Direction, (i32, i32)> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_cell`
[INFO] [stdout]    --> src/grid.rs:117:12
[INFO] [stdout]     |
[INFO] [stdout] 117 |     pub fn replace_cell(&mut self, cll: cell::Cell) -> Result<(), &str> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]    --> src/grid.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn size(&self) -> i32 {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell`
[INFO] [stdout]    --> src/grid.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn random_cell(&self) -> &cell::Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell_cloned`
[INFO] [stdout]    --> src/grid.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub fn random_cell_cloned(&self) -> cell::Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell_mut`
[INFO] [stdout]    --> src/grid.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub fn random_cell_mut(&mut self) -> &mut cell::Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_png`
[INFO] [stdout]    --> src/grid.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn to_png(&self, cell_size: i32, filename: &str) -> Result<(), String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]    --> src/grid.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     next: Option<&'a cell::Cell>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `base_from_coords`
[INFO] [stdout]   --> src/graph.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn base_from_coords(rows: i32, columns: i32) -> UnGraph<(i32, i32), ()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Neighbors`
[INFO] [stdout]  --> src/hash_grid.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Neighbors {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_neighbor_coords`
[INFO] [stdout]   --> src/hash_grid.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn get_neighbor_coords(current: (i32, i32)) -> Neighbors {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/hash_grid.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn new(rows: i32, columns: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_cells`
[INFO] [stdout]   --> src/hash_grid.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn from_cells(cells: Vec<Vec<cell::Cell>>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `prepare_grid`
[INFO] [stdout]   --> src/hash_grid.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn prepare_grid(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `configure_cells`
[INFO] [stdout]   --> src/hash_grid.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn configure_cells(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_item`
[INFO] [stdout]    --> src/hash_grid.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout] 100 |     pub fn get_item(&self, row_col: (i32, i32)) -> Option<&cell::Cell> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_cell`
[INFO] [stdout]    --> src/hash_grid.rs:110:12
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn replace_cell(&mut self, cll: cell::Cell) -> Result<(), &str> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]    --> src/hash_grid.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn size(&self) -> i32 {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell`
[INFO] [stdout]    --> src/hash_grid.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn random_cell(&self) -> Option<&cell::Cell> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_png`
[INFO] [stdout]    --> src/hash_grid.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn to_png(&self, cell_size: i32, filename: &str) -> Result<(), String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     graph::to_png(&sidewinder_graph, 50, 12, 12, "sidewinder_from_graph.png");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.92s
[INFO] running `Command { std: "docker" "inspect" "746a4c1b323a02df23a08d958fa0d0eedf8fbe99c635491c2cdceacab784bd9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "746a4c1b323a02df23a08d958fa0d0eedf8fbe99c635491c2cdceacab784bd9d", kill_on_drop: false }`
[INFO] [stdout] 746a4c1b323a02df23a08d958fa0d0eedf8fbe99c635491c2cdceacab784bd9d