[INFO] cloning repository https://github.com/taigi100/AoC23
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/taigi100/AoC23" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaigi100%2FAoC23", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaigi100%2FAoC23'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f98076b60ca01d34be4d857b6f6ea8e2d986fb05
[INFO] building taigi100/AoC23 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaigi100%2FAoC23" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/taigi100/AoC23 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/taigi100/AoC23
[INFO] finished tweaking git repo https://github.com/taigi100/AoC23
[INFO] tweaked toml for git repo https://github.com/taigi100/AoC23 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/taigi100/AoC23 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded transpose v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec6751763c472e0b346853c4cc467ec197b0ecea2ec0d5042a4779f2ecb66a74
[INFO] running `Command { std: "docker" "start" "-a" "ec6751763c472e0b346853c4cc467ec197b0ecea2ec0d5042a4779f2ecb66a74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec6751763c472e0b346853c4cc467ec197b0ecea2ec0d5042a4779f2ecb66a74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec6751763c472e0b346853c4cc467ec197b0ecea2ec0d5042a4779f2ecb66a74", kill_on_drop: false }`
[INFO] [stdout] ec6751763c472e0b346853c4cc467ec197b0ecea2ec0d5042a4779f2ecb66a74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43536197ce51040462c0f5e989f2dcc730f9a9e5a16b82d8fd2b98f76eb0ced0
[INFO] running `Command { std: "docker" "start" "-a" "43536197ce51040462c0f5e989f2dcc730f9a9e5a16b82d8fd2b98f76eb0ced0", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling strength_reduce v0.2.4
[INFO] [stderr]    Compiling itertools v0.12.0
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling transpose v0.2.2
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling AoC23 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:99:16
[INFO] [stdout]    |
[INFO] [stdout] 99 |             if (i == 0 && grid[&(i, j)] == '.') {
[INFO] [stdout]    |                ^                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 99 -             if (i == 0 && grid[&(i, j)] == '.') {
[INFO] [stdout] 99 +             if i == 0 && grid[&(i, j)] == '.' {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 102 |             if (i == data.lines().count() - 1 && grid[&(i, j)] == '.') {
[INFO] [stdout]     |                ^                                                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 102 -             if (i == data.lines().count() - 1 && grid[&(i, j)] == '.') {
[INFO] [stdout] 102 +             if i == data.lines().count() - 1 && grid[&(i, j)] == '.' {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:120:22
[INFO] [stdout]     |
[INFO] [stdout] 120 |             let dx = (i as isize + di);
[INFO] [stdout]     |                      ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 120 -             let dx = (i as isize + di);
[INFO] [stdout] 120 +             let dx = i as isize + di;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:121:22
[INFO] [stdout]     |
[INFO] [stdout] 121 |             let dy = (j as isize + dj);
[INFO] [stdout]     |                      ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 121 -             let dy = (j as isize + dj);
[INFO] [stdout] 121 +             let dy = j as isize + dj;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:173:16
[INFO] [stdout]     |
[INFO] [stdout] 173 |             if (distance > 1) {
[INFO] [stdout]     |                ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 173 -             if (distance > 1) {
[INFO] [stdout] 173 +             if distance > 1 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:319:22
[INFO] [stdout]     |
[INFO] [stdout] 319 |             for x in (b.0 .0..=b.1 .0) {
[INFO] [stdout]     |                      ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 319 -             for x in (b.0 .0..=b.1 .0) {
[INFO] [stdout] 319 +             for x in b.0 .0..=b.1 .0 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:320:26
[INFO] [stdout]     |
[INFO] [stdout] 320 |                 for y in (b.0 .1..=b.1 .1) {
[INFO] [stdout]     |                          ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 320 -                 for y in (b.0 .1..=b.1 .1) {
[INFO] [stdout] 320 +                 for y in b.0 .1..=b.1 .1 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/main.rs:797:40
[INFO] [stdout]     |
[INFO] [stdout] 797 |             let mut valid_dirs = match (dir) {
[INFO] [stdout]     |                                        ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 797 -             let mut valid_dirs = match (dir) {
[INFO] [stdout] 797 +             let mut valid_dirs = match dir {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/main.rs:871:62
[INFO] [stdout]     |
[INFO] [stdout] 871 |         seen: &mut HashMap<((usize, usize), (isize, isize)), (u32)>,
[INFO] [stdout]     |                                                              ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 871 -         seen: &mut HashMap<((usize, usize), (isize, isize)), (u32)>,
[INFO] [stdout] 871 +         seen: &mut HashMap<((usize, usize), (isize, isize)), u32>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:698:21
[INFO] [stdout]     |
[INFO] [stdout] 697 |                     return ans;
[INFO] [stdout]     |                     ---------- any code following this expression is unreachable
[INFO] [stdout] 698 |                     continue;
[INFO] [stdout]     |                     ^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let (mut p1, mut p2) = (0, 0);
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |                  ----^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |                  ----^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]   --> src/main.rs:92:22
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |                      ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:92:10
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |          ----^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:216:13
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let mut path = vec![start];
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:332:14
[INFO] [stdout]     |
[INFO] [stdout] 332 |         let (mut falls, _) = drop(removed);
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]    --> src/main.rs:344:14
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |              ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `gradens_counter` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:350:13
[INFO] [stdout]     |
[INFO] [stdout] 350 |     let mut gradens_counter = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_gradens_counter` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `N`
[INFO] [stdout]    --> src/main.rs:383:9
[INFO] [stdout]     |
[INFO] [stdout] 383 |     let N = grid.len() as i64;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_N`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:344:18
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                  ----^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:448:10
[INFO] [stdout]     |
[INFO] [stdout] 448 |     for (n, v) in &graph {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]    --> src/main.rs:472:10
[INFO] [stdout]     |
[INFO] [stdout] 472 |     for (node, conj) in &mut conjunctions {
[INFO] [stdout]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/main.rs:566:24
[INFO] [stdout]     |
[INFO] [stdout] 566 |                 .map(|(s, v)| *v as u64)
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:417:10
[INFO] [stdout]     |
[INFO] [stdout] 417 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/main.rs:516:53
[INFO] [stdout]     |
[INFO] [stdout] 516 |                         if conjunction.iter().any(|(v, s)| *s == -1) {
[INFO] [stdout]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]    --> src/main.rs:578:22
[INFO] [stdout]     |
[INFO] [stdout] 578 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                      ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:672:25
[INFO] [stdout]     |
[INFO] [stdout] 672 |             let (l, op, mut v) = (
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:734:14
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/main.rs:734:21
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dir`
[INFO] [stdout]    --> src/main.rs:742:13
[INFO] [stdout]     |
[INFO] [stdout] 742 |         let dir = line.split_whitespace().nth(0).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_dir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cnt` is never read
[INFO] [stdout]    --> src/main.rs:743:17
[INFO] [stdout]     |
[INFO] [stdout] 743 |         let mut cnt = line
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:731:10
[INFO] [stdout]     |
[INFO] [stdout] 731 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:731:18
[INFO] [stdout]     |
[INFO] [stdout] 731 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                  ----^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:734:10
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |          ----^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:734:17
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:756:13
[INFO] [stdout]     |
[INFO] [stdout] 756 |         let mut direction = match color.as_bytes()[color.len() - 1] {
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]    --> src/main.rs:779:14
[INFO] [stdout]     |
[INFO] [stdout] 779 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |              ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]    --> src/main.rs:779:22
[INFO] [stdout]     |
[INFO] [stdout] 779 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                      ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dirs`
[INFO] [stdout]    --> src/main.rs:780:9
[INFO] [stdout]     |
[INFO] [stdout] 780 |     let dirs = [(1, 0), (0, 1), (-1, 0), (0, -1)];
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_dirs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]    --> src/main.rs:791:17
[INFO] [stdout]     |
[INFO] [stdout] 791 |         let mut location = (0, 0);
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cost`
[INFO] [stdout]    --> src/main.rs:796:18
[INFO] [stdout]     |
[INFO] [stdout] 796 |             let (cost, steps, node, dir) = item;
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_cost`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:791:13
[INFO] [stdout]     |
[INFO] [stdout] 791 |         let mut location = (0, 0);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]    --> src/main.rs:861:14
[INFO] [stdout]     |
[INFO] [stdout] 861 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |              ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]    --> src/main.rs:861:22
[INFO] [stdout]     |
[INFO] [stdout] 861 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                      ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1086:22
[INFO] [stdout]      |
[INFO] [stdout] 1086 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1086:10
[INFO] [stdout]      |
[INFO] [stdout] 1086 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |          ----^^
[INFO] [stdout]      |          |
[INFO] [stdout]      |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1186:18
[INFO] [stdout]      |
[INFO] [stdout] 1186 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                  ----^^
[INFO] [stdout]      |                  |
[INFO] [stdout]      |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parity` is never read
[INFO] [stdout]     --> src/main.rs:1534:13
[INFO] [stdout]      |
[INFO] [stdout] 1534 |     let mut parity = 0;
[INFO] [stdout]      |             ^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1600:22
[INFO] [stdout]      |
[INFO] [stdout] 1600 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1650:10
[INFO] [stdout]      |
[INFO] [stdout] 1650 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |          ----^^
[INFO] [stdout]      |          |
[INFO] [stdout]      |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]     --> src/main.rs:1722:14
[INFO] [stdout]      |
[INFO] [stdout] 1722 |     let (mut p1, mut p2) = (0, 0.0);
[INFO] [stdout]      |              ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1722:22
[INFO] [stdout]      |
[INFO] [stdout] 1722 |     let (mut p1, mut p2) = (0, 0.0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]     --> src/main.rs:1774:14
[INFO] [stdout]      |
[INFO] [stdout] 1774 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |              ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1774:22
[INFO] [stdout]      |
[INFO] [stdout] 1774 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counter` is assigned to, but never used
[INFO] [stdout]     --> src/main.rs:1787:13
[INFO] [stdout]      |
[INFO] [stdout] 1787 |     let mut counter = -1;
[INFO] [stdout]      |             ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_counter` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]     --> src/main.rs:1823:5
[INFO] [stdout]      |
[INFO] [stdout] 1823 |     i = 0;
[INFO] [stdout]      |     ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]     --> src/main.rs:1953:17
[INFO] [stdout]      |
[INFO] [stdout] 1953 |         let mut r = 0;
[INFO] [stdout]      |                 ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `g` is never read
[INFO] [stdout]     --> src/main.rs:1954:17
[INFO] [stdout]      |
[INFO] [stdout] 1954 |         let mut g = 0;
[INFO] [stdout]      |                 ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]     --> src/main.rs:1955:17
[INFO] [stdout]      |
[INFO] [stdout] 1955 |         let mut b = 0;
[INFO] [stdout]      |                 ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l`
[INFO] [stdout]     --> src/main.rs:2023:26
[INFO] [stdout]      |
[INFO] [stdout] 2023 |         let get_digit = |l: String| -> (i32, i32) {
[INFO] [stdout]      |                          ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:2007:17
[INFO] [stdout]      |
[INFO] [stdout] 2007 |             let mut aux = result;
[INFO] [stdout]      |                 ----^^^
[INFO] [stdout]      |                 |
[INFO] [stdout]      |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:2000:9
[INFO] [stdout]      |
[INFO] [stdout] 2000 |     let mut lines = data.lines();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]   --> src/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut G: HashMap<String, Vec<String>> = HashMap::new();
[INFO] [stdout]    |             ^ help: convert the identifier to snake case: `g`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |     let mut S = VecDeque::new();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `DFS` should have a snake case name
[INFO] [stdout]    --> src/main.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn DFS(
[INFO] [stdout]     |        ^^^ help: convert the identifier to snake case: `dfs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:214:17
[INFO] [stdout]     |
[INFO] [stdout] 214 |         let mut S = VecDeque::new();
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:383:9
[INFO] [stdout]     |
[INFO] [stdout] 383 |     let N = grid.len() as i64;
[INFO] [stdout]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/main.rs:423:32
[INFO] [stdout]     |
[INFO] [stdout] 423 |         let mut new_line = line.clone();
[INFO] [stdout]     |                                ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `DFS` should have a snake case name
[INFO] [stdout]    --> src/main.rs:479:8
[INFO] [stdout]     |
[INFO] [stdout] 479 |     fn DFS<'a>(
[INFO] [stdout]     |        ^^^ help: convert the identifier to snake case: `dfs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]     --> src/main.rs:1508:16
[INFO] [stdout]      |
[INFO] [stdout] 1508 |             if x < 0 || x >= lines || y < 0 || y >= cols {
[INFO] [stdout]      |                ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]     --> src/main.rs:1508:39
[INFO] [stdout]      |
[INFO] [stdout] 1508 |             if x < 0 || x >= lines || y < 0 || y >= cols {
[INFO] [stdout]      |                                       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.88s
[INFO] running `Command { std: "docker" "inspect" "43536197ce51040462c0f5e989f2dcc730f9a9e5a16b82d8fd2b98f76eb0ced0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43536197ce51040462c0f5e989f2dcc730f9a9e5a16b82d8fd2b98f76eb0ced0", kill_on_drop: false }`
[INFO] [stdout] 43536197ce51040462c0f5e989f2dcc730f9a9e5a16b82d8fd2b98f76eb0ced0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad123bc0f0cb3ce2112731a44b82c0f03d85811fafcc1f9887af4a08ad4a78a9
[INFO] running `Command { std: "docker" "start" "-a" "ad123bc0f0cb3ce2112731a44b82c0f03d85811fafcc1f9887af4a08ad4a78a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling AoC23 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:99:16
[INFO] [stdout]    |
[INFO] [stdout] 99 |             if (i == 0 && grid[&(i, j)] == '.') {
[INFO] [stdout]    |                ^                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 99 -             if (i == 0 && grid[&(i, j)] == '.') {
[INFO] [stdout] 99 +             if i == 0 && grid[&(i, j)] == '.' {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 102 |             if (i == data.lines().count() - 1 && grid[&(i, j)] == '.') {
[INFO] [stdout]     |                ^                                                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 102 -             if (i == data.lines().count() - 1 && grid[&(i, j)] == '.') {
[INFO] [stdout] 102 +             if i == data.lines().count() - 1 && grid[&(i, j)] == '.' {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:120:22
[INFO] [stdout]     |
[INFO] [stdout] 120 |             let dx = (i as isize + di);
[INFO] [stdout]     |                      ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 120 -             let dx = (i as isize + di);
[INFO] [stdout] 120 +             let dx = i as isize + di;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:121:22
[INFO] [stdout]     |
[INFO] [stdout] 121 |             let dy = (j as isize + dj);
[INFO] [stdout]     |                      ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 121 -             let dy = (j as isize + dj);
[INFO] [stdout] 121 +             let dy = j as isize + dj;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:173:16
[INFO] [stdout]     |
[INFO] [stdout] 173 |             if (distance > 1) {
[INFO] [stdout]     |                ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 173 -             if (distance > 1) {
[INFO] [stdout] 173 +             if distance > 1 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:319:22
[INFO] [stdout]     |
[INFO] [stdout] 319 |             for x in (b.0 .0..=b.1 .0) {
[INFO] [stdout]     |                      ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 319 -             for x in (b.0 .0..=b.1 .0) {
[INFO] [stdout] 319 +             for x in b.0 .0..=b.1 .0 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:320:26
[INFO] [stdout]     |
[INFO] [stdout] 320 |                 for y in (b.0 .1..=b.1 .1) {
[INFO] [stdout]     |                          ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 320 -                 for y in (b.0 .1..=b.1 .1) {
[INFO] [stdout] 320 +                 for y in b.0 .1..=b.1 .1 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/main.rs:797:40
[INFO] [stdout]     |
[INFO] [stdout] 797 |             let mut valid_dirs = match (dir) {
[INFO] [stdout]     |                                        ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 797 -             let mut valid_dirs = match (dir) {
[INFO] [stdout] 797 +             let mut valid_dirs = match dir {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/main.rs:871:62
[INFO] [stdout]     |
[INFO] [stdout] 871 |         seen: &mut HashMap<((usize, usize), (isize, isize)), (u32)>,
[INFO] [stdout]     |                                                              ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 871 -         seen: &mut HashMap<((usize, usize), (isize, isize)), (u32)>,
[INFO] [stdout] 871 +         seen: &mut HashMap<((usize, usize), (isize, isize)), u32>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:698:21
[INFO] [stdout]     |
[INFO] [stdout] 697 |                     return ans;
[INFO] [stdout]     |                     ---------- any code following this expression is unreachable
[INFO] [stdout] 698 |                     continue;
[INFO] [stdout]     |                     ^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let (mut p1, mut p2) = (0, 0);
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |                  ----^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |                  ----^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]   --> src/main.rs:92:22
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |                      ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:92:10
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]    |          ----^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:216:13
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let mut path = vec![start];
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:332:14
[INFO] [stdout]     |
[INFO] [stdout] 332 |         let (mut falls, _) = drop(removed);
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]    --> src/main.rs:344:14
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |              ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `gradens_counter` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:350:13
[INFO] [stdout]     |
[INFO] [stdout] 350 |     let mut gradens_counter = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_gradens_counter` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `N`
[INFO] [stdout]    --> src/main.rs:383:9
[INFO] [stdout]     |
[INFO] [stdout] 383 |     let N = grid.len() as i64;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_N`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:344:18
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                  ----^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:448:10
[INFO] [stdout]     |
[INFO] [stdout] 448 |     for (n, v) in &graph {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]    --> src/main.rs:472:10
[INFO] [stdout]     |
[INFO] [stdout] 472 |     for (node, conj) in &mut conjunctions {
[INFO] [stdout]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/main.rs:566:24
[INFO] [stdout]     |
[INFO] [stdout] 566 |                 .map(|(s, v)| *v as u64)
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:417:10
[INFO] [stdout]     |
[INFO] [stdout] 417 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/main.rs:516:53
[INFO] [stdout]     |
[INFO] [stdout] 516 |                         if conjunction.iter().any(|(v, s)| *s == -1) {
[INFO] [stdout]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]    --> src/main.rs:578:22
[INFO] [stdout]     |
[INFO] [stdout] 578 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                      ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:672:25
[INFO] [stdout]     |
[INFO] [stdout] 672 |             let (l, op, mut v) = (
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:734:14
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/main.rs:734:21
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dir`
[INFO] [stdout]    --> src/main.rs:742:13
[INFO] [stdout]     |
[INFO] [stdout] 742 |         let dir = line.split_whitespace().nth(0).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_dir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cnt` is never read
[INFO] [stdout]    --> src/main.rs:743:17
[INFO] [stdout]     |
[INFO] [stdout] 743 |         let mut cnt = line
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:731:10
[INFO] [stdout]     |
[INFO] [stdout] 731 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:731:18
[INFO] [stdout]     |
[INFO] [stdout] 731 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                  ----^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:734:10
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |          ----^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:734:17
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let (mut n, mut m) = (0, 0);
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:756:13
[INFO] [stdout]     |
[INFO] [stdout] 756 |         let mut direction = match color.as_bytes()[color.len() - 1] {
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]    --> src/main.rs:779:14
[INFO] [stdout]     |
[INFO] [stdout] 779 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |              ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]    --> src/main.rs:779:22
[INFO] [stdout]     |
[INFO] [stdout] 779 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                      ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dirs`
[INFO] [stdout]    --> src/main.rs:780:9
[INFO] [stdout]     |
[INFO] [stdout] 780 |     let dirs = [(1, 0), (0, 1), (-1, 0), (0, -1)];
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_dirs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]    --> src/main.rs:791:17
[INFO] [stdout]     |
[INFO] [stdout] 791 |         let mut location = (0, 0);
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cost`
[INFO] [stdout]    --> src/main.rs:796:18
[INFO] [stdout]     |
[INFO] [stdout] 796 |             let (cost, steps, node, dir) = item;
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_cost`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:791:13
[INFO] [stdout]     |
[INFO] [stdout] 791 |         let mut location = (0, 0);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]    --> src/main.rs:861:14
[INFO] [stdout]     |
[INFO] [stdout] 861 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |              ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]    --> src/main.rs:861:22
[INFO] [stdout]     |
[INFO] [stdout] 861 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]     |                      ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1086:22
[INFO] [stdout]      |
[INFO] [stdout] 1086 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1086:10
[INFO] [stdout]      |
[INFO] [stdout] 1086 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |          ----^^
[INFO] [stdout]      |          |
[INFO] [stdout]      |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1186:18
[INFO] [stdout]      |
[INFO] [stdout] 1186 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                  ----^^
[INFO] [stdout]      |                  |
[INFO] [stdout]      |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parity` is never read
[INFO] [stdout]     --> src/main.rs:1534:13
[INFO] [stdout]      |
[INFO] [stdout] 1534 |     let mut parity = 0;
[INFO] [stdout]      |             ^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1600:22
[INFO] [stdout]      |
[INFO] [stdout] 1600 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1650:10
[INFO] [stdout]      |
[INFO] [stdout] 1650 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |          ----^^
[INFO] [stdout]      |          |
[INFO] [stdout]      |          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]     --> src/main.rs:1722:14
[INFO] [stdout]      |
[INFO] [stdout] 1722 |     let (mut p1, mut p2) = (0, 0.0);
[INFO] [stdout]      |              ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1722:22
[INFO] [stdout]      |
[INFO] [stdout] 1722 |     let (mut p1, mut p2) = (0, 0.0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p1` is never read
[INFO] [stdout]     --> src/main.rs:1774:14
[INFO] [stdout]      |
[INFO] [stdout] 1774 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |              ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p2` is never read
[INFO] [stdout]     --> src/main.rs:1774:22
[INFO] [stdout]      |
[INFO] [stdout] 1774 |     let (mut p1, mut p2) = (0, 0);
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counter` is assigned to, but never used
[INFO] [stdout]     --> src/main.rs:1787:13
[INFO] [stdout]      |
[INFO] [stdout] 1787 |     let mut counter = -1;
[INFO] [stdout]      |             ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_counter` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]     --> src/main.rs:1823:5
[INFO] [stdout]      |
[INFO] [stdout] 1823 |     i = 0;
[INFO] [stdout]      |     ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]     --> src/main.rs:1953:17
[INFO] [stdout]      |
[INFO] [stdout] 1953 |         let mut r = 0;
[INFO] [stdout]      |                 ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `g` is never read
[INFO] [stdout]     --> src/main.rs:1954:17
[INFO] [stdout]      |
[INFO] [stdout] 1954 |         let mut g = 0;
[INFO] [stdout]      |                 ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]     --> src/main.rs:1955:17
[INFO] [stdout]      |
[INFO] [stdout] 1955 |         let mut b = 0;
[INFO] [stdout]      |                 ^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l`
[INFO] [stdout]     --> src/main.rs:2023:26
[INFO] [stdout]      |
[INFO] [stdout] 2023 |         let get_digit = |l: String| -> (i32, i32) {
[INFO] [stdout]      |                          ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:2007:17
[INFO] [stdout]      |
[INFO] [stdout] 2007 |             let mut aux = result;
[INFO] [stdout]      |                 ----^^^
[INFO] [stdout]      |                 |
[INFO] [stdout]      |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:2000:9
[INFO] [stdout]      |
[INFO] [stdout] 2000 |     let mut lines = data.lines();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]   --> src/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut G: HashMap<String, Vec<String>> = HashMap::new();
[INFO] [stdout]    |             ^ help: convert the identifier to snake case: `g`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |     let mut S = VecDeque::new();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `DFS` should have a snake case name
[INFO] [stdout]    --> src/main.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn DFS(
[INFO] [stdout]     |        ^^^ help: convert the identifier to snake case: `dfs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:214:17
[INFO] [stdout]     |
[INFO] [stdout] 214 |         let mut S = VecDeque::new();
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:383:9
[INFO] [stdout]     |
[INFO] [stdout] 383 |     let N = grid.len() as i64;
[INFO] [stdout]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/main.rs:423:32
[INFO] [stdout]     |
[INFO] [stdout] 423 |         let mut new_line = line.clone();
[INFO] [stdout]     |                                ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `DFS` should have a snake case name
[INFO] [stdout]    --> src/main.rs:479:8
[INFO] [stdout]     |
[INFO] [stdout] 479 |     fn DFS<'a>(
[INFO] [stdout]     |        ^^^ help: convert the identifier to snake case: `dfs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]     --> src/main.rs:1508:16
[INFO] [stdout]      |
[INFO] [stdout] 1508 |             if x < 0 || x >= lines || y < 0 || y >= cols {
[INFO] [stdout]      |                ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]     --> src/main.rs:1508:39
[INFO] [stdout]      |
[INFO] [stdout] 1508 |             if x < 0 || x >= lines || y < 0 || y >= cols {
[INFO] [stdout]      |                                       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "ad123bc0f0cb3ce2112731a44b82c0f03d85811fafcc1f9887af4a08ad4a78a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad123bc0f0cb3ce2112731a44b82c0f03d85811fafcc1f9887af4a08ad4a78a9", kill_on_drop: false }`
[INFO] [stdout] ad123bc0f0cb3ce2112731a44b82c0f03d85811fafcc1f9887af4a08ad4a78a9