[INFO] cloning repository https://github.com/Jagholin/aoc_2022
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jagholin/aoc_2022" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJagholin%2Faoc_2022", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJagholin%2Faoc_2022'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 22b69682a183357c3bff002c58d50478a7cdbf4f
[INFO] checking Jagholin/aoc_2022 against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJagholin%2Faoc_2022" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Jagholin/aoc_2022
[INFO] finished tweaking git repo https://github.com/Jagholin/aoc_2022
[INFO] tweaked toml for git repo https://github.com/Jagholin/aoc_2022 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Jagholin/aoc_2022 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Jagholin/aoc_2022 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e484751a74f88b8c27fdd51d8025eb0050303f62592e350e189f9644ff575d1
[INFO] running `Command { std: "docker" "start" "-a" "7e484751a74f88b8c27fdd51d8025eb0050303f62592e350e189f9644ff575d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e484751a74f88b8c27fdd51d8025eb0050303f62592e350e189f9644ff575d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e484751a74f88b8c27fdd51d8025eb0050303f62592e350e189f9644ff575d1", kill_on_drop: false }`
[INFO] [stdout] 7e484751a74f88b8c27fdd51d8025eb0050303f62592e350e189f9644ff575d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfce92d1c44aeaaaf57fb4ca50371bad6824a769f7c80a9eb40a3d2732391002
[INFO] running `Command { std: "docker" "start" "-a" "dfce92d1c44aeaaaf57fb4ca50371bad6824a769f7c80a9eb40a3d2732391002", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.37
[INFO] [stderr]     Checking aoc_2022 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main7_alternative.rs:178:39
[INFO] [stdout]     |
[INFO] [stdout] 178 |     root_fs.visit_tree(&mut |size, _, t| {
[INFO] [stdout]     |                                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main6b.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut input = read_to_string("input6a.txt").unwrap();
[INFO] [stdout]   |         ----^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main6a.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut input = read_to_string("input6a.txt").unwrap();
[INFO] [stdout]   |         ----^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main3a.rs:37:27
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout]    |                           ^                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 -         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout] 37 +         let priority = if intersect.is_ascii_lowercase()  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/main5a.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main3a.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut score_total = 0;
[INFO] [stdout]   |         ----^^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score_total`
[INFO] [stdout]  --> src/main3a.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut score_total = 0;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_score_total`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main16b.rs:143:14
[INFO] [stdout]     |
[INFO] [stdout] 143 |         for (i, dest) in remaining_destinations.iter().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `connections` is never read
[INFO] [stdout]   --> src/main16b.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct ValvePaths<'a> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 13 |     flow_rate: u32,
[INFO] [stdout] 14 |     connections: Vec<&'a str>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ValvePaths` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value`, `path_length`, and `node` are never read
[INFO] [stdout]   --> src/main16b.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct PathElement<'a> {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 20 |     value: u32, // value of the current valve
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     // total_value: u32,
[INFO] [stdout] 22 |     path_length: usize, // how much time is lost getting to the node
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 23 |     node: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PathElement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5a.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut from_vec = columns.get_mut(&from).unwrap();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5a.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut to_vec = columns.get_mut(&to).unwrap();
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/main13b.rs:124:42
[INFO] [stdout]     |
[INFO] [stdout] 124 |             (Self::Number(n), Self::List(m)) => {
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main13b.rs:127:25
[INFO] [stdout]     |
[INFO] [stdout] 127 |             (Self::List(n), Self::Number(m)) => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main13b.rs:144:10
[INFO] [stdout]     |
[INFO] [stdout] 144 |     for (i, pairs) in input.split("\n\n").enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main6b.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut input = read_to_string("input6a.txt").unwrap();
[INFO] [stdout]   |         ----^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `half_overlap` is never used
[INFO] [stdout]  --> src/main4a.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn half_overlap(a1: i32, a2: i32, b1: i32, _b2: i32) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counter` is assigned to, but never used
[INFO] [stdout]    --> src/main12b.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |     let mut counter = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_counter` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `counter` is never read
[INFO] [stdout]    --> src/main12b.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         counter += 1;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]  --> src/main8a.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     H: usize,
[INFO] [stdout]   |     ^ help: convert the identifier to snake case: `h`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     W: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:25:61
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn tree_visible(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> bool {
[INFO] [stdout]    |                                                             ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:25:71
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn tree_visible(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> bool {
[INFO] [stdout]    |                                                                       ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let H = treeline.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let W = treeline[0].len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/main5b.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main9b.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         for i in 0..distance {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7b.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     children,
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5b.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut from_vec = columns.get_mut(&from).unwrap();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5b.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut to_vec = columns.get_mut(&to).unwrap();
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     size,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7b.rs:34:21
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     name,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7b.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     children,
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     size,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7b.rs:34:21
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     name,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7b.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7b.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7b.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 children,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 size,
[INFO] [stdout]    |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 parent,
[INFO] [stdout]    |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:94:28
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:94:40
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]    --> src/main7b.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 children,
[INFO] [stdout]     |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 size,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:107:28
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:107:34
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:127:34
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7b.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7b.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7b.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 children,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 size,
[INFO] [stdout]    |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 parent,
[INFO] [stdout]    |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7b.rs:94:28
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7b.rs:94:40
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:127:40
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:149:28
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:149:40
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]    --> src/main7b.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 children,
[INFO] [stdout]     |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 size,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:107:28
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:107:34
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:127:34
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:127:40
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:149:28
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:149:40
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7b.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |     let mut input = read_to_string("input7a.txt").unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7b.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let mut fs_root = FSNode::new_dir("/", None);
[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/main7b.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |     let mut size_sum = 0;
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:184:29
[INFO] [stdout]     |
[INFO] [stdout] 184 | ...                   size,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:185:29
[INFO] [stdout]     |
[INFO] [stdout] 185 | ...                   name,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7b.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |     let mut input = read_to_string("input7a.txt").unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7b.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let mut fs_root = FSNode::new_dir("/", None);
[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/main7b.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |     let mut size_sum = 0;
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7b.rs:184:29
[INFO] [stdout]     |
[INFO] [stdout] 184 | ...                   size,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7b.rs:185:29
[INFO] [stdout]     |
[INFO] [stdout] 185 | ...                   name,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 | ...                   parent,
[INFO] [stdout]     |                       ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7b.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 | ...                   parent,
[INFO] [stdout]     |                       ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counter` is assigned to, but never used
[INFO] [stdout]    --> src/main12b.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |     let mut counter = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_counter` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `counter` is never read
[INFO] [stdout]    --> src/main12b.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         counter += 1;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main16a.rs:120:10
[INFO] [stdout]     |
[INFO] [stdout] 120 |     for (i, dest) in remaining_destinations.iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `connections` is never read
[INFO] [stdout]   --> src/main16a.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct ValvePaths<'a> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 13 |     flow_rate: u32,
[INFO] [stdout] 14 |     connections: Vec<&'a str>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ValvePaths` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value`, `path_length`, and `node` are never read
[INFO] [stdout]   --> src/main16a.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct PathElement<'a> {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 20 |     value: u32, // value of the current valve
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     // total_value: u32,
[INFO] [stdout] 22 |     path_length: usize, // how much time is lost getting to the node
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 23 |     node: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PathElement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main3b.rs:44:27
[INFO] [stdout]    |
[INFO] [stdout] 44 |         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout]    |                           ^                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 44 -         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout] 44 +         let priority = if intersect.is_ascii_lowercase()  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main3b.rs:44:27
[INFO] [stdout]    |
[INFO] [stdout] 44 |         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout]    |                           ^                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 44 -         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout] 44 +         let priority = if intersect.is_ascii_lowercase()  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_calories` is never read
[INFO] [stdout]   --> src/main1b.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         max_calories = current_calories;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main3b.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut score_total = 0;
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score_total`
[INFO] [stdout]   --> src/main3b.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut score_total = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_score_total`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main3b.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut score_total = 0;
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score_total`
[INFO] [stdout]   --> src/main3b.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut score_total = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_score_total`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7a.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     children,
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7a.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     children,
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     size,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7a.rs:34:21
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     name,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     size,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7a.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7a.rs:34:21
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     name,
[INFO] [stdout]    |                     ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7a.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7a.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7a.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 children,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 size,
[INFO] [stdout]    |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 parent,
[INFO] [stdout]    |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:94:28
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:94:40
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             size,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main7a.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             name,
[INFO] [stdout]    |             ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             parent,
[INFO] [stdout]    |             ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]   --> src/main7a.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 children,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 size,
[INFO] [stdout]    |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 parent,
[INFO] [stdout]    |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main7a.rs:94:28
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/main7a.rs:94:40
[INFO] [stdout]    |
[INFO] [stdout] 94 |             FSNode::File { size, name, parent } => name,
[INFO] [stdout]    |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]    --> src/main7a.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 children,
[INFO] [stdout]     |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 size,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:107:28
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:107:34
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `children`
[INFO] [stdout]    --> src/main7a.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 children,
[INFO] [stdout]     |                 ^^^^^^^^ help: try ignoring the field: `children: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 size,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:127:34
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:127:40
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:104:17
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:107:28
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:107:34
[INFO] [stdout]     |
[INFO] [stdout] 107 |             FSNode::File { size, name, parent } => parent.upgrade().unwrap(),
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:127:34
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:127:40
[INFO] [stdout]     |
[INFO] [stdout] 127 |             FSNode::File { size, name, parent } => *size,
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:149:28
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:149:40
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main9a.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for i in 0..distance {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     H: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case: `h`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 name,
[INFO] [stdout]     |                 ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 parent,
[INFO] [stdout]     |                 ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:149:28
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                            ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:149:34
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                  ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:149:40
[INFO] [stdout]     |
[INFO] [stdout] 149 |             FSNode::File { size, name, parent } => {}
[INFO] [stdout]     |                                        ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     W: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:33:64
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn tree_visibility(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> i32 {
[INFO] [stdout]    |                                                                ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:33:74
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn tree_visibility(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> i32 {
[INFO] [stdout]    |                                                                          ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let H = treeline.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let W = treeline[0].len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main16b.rs:143:14
[INFO] [stdout]     |
[INFO] [stdout] 143 |         for (i, dest) in remaining_destinations.iter().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7a.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |     let mut input = read_to_string("input7a.txt").unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7a.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let mut fs_root = FSNode::new_dir("/", None);
[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/main7a.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |     let mut candidates_vec: Vec<usize> = vec![];
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:184:29
[INFO] [stdout]     |
[INFO] [stdout] 184 | ...                   size,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:185:29
[INFO] [stdout]     |
[INFO] [stdout] 185 | ...                   name,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 | ...                   parent,
[INFO] [stdout]     |                       ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min_size_to_free`
[INFO] [stdout]    --> src/main7a.rs:238:9
[INFO] [stdout]     |
[INFO] [stdout] 238 |     let min_size_to_free = 30000000 - unused_space;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_min_size_to_free`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidates_vec`
[INFO] [stdout]    --> src/main7a.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |     let mut candidates_vec: Vec<usize> = vec![];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidates_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]  --> src/main8a.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     H: usize,
[INFO] [stdout]   |     ^ help: convert the identifier to snake case: `h`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7a.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |     let mut input = read_to_string("input7a.txt").unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     W: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:25:61
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn tree_visible(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> bool {
[INFO] [stdout]    |                                                             ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:25:71
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn tree_visible(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> bool {
[INFO] [stdout]    |                                                                       ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let H = treeline.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8a.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let W = treeline[0].len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counter` is assigned to, but never used
[INFO] [stdout]    --> src/main12a.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     let mut counter = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_counter` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `counter` is never read
[INFO] [stdout]    --> src/main12a.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         counter += 1;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main7a.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let mut fs_root = FSNode::new_dir("/", None);
[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/main7a.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |     let mut candidates_vec: Vec<usize> = vec![];
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/main7a.rs:184:29
[INFO] [stdout]     |
[INFO] [stdout] 184 | ...                   size,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `size: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/main7a.rs:185:29
[INFO] [stdout]     |
[INFO] [stdout] 185 | ...                   name,
[INFO] [stdout]     |                       ^^^^ help: try ignoring the field: `name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main7a.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 | ...                   parent,
[INFO] [stdout]     |                       ^^^^^^ help: try ignoring the field: `parent: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min_size_to_free`
[INFO] [stdout]    --> src/main7a.rs:238:9
[INFO] [stdout]     |
[INFO] [stdout] 238 |     let min_size_to_free = 30000000 - unused_space;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_min_size_to_free`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidates_vec`
[INFO] [stdout]    --> src/main7a.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |     let mut candidates_vec: Vec<usize> = vec![];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidates_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main7_alternative.rs:178:39
[INFO] [stdout]     |
[INFO] [stdout] 178 |     root_fs.visit_tree(&mut |size, _, t| {
[INFO] [stdout]     |                                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `connections` is never read
[INFO] [stdout]   --> src/main16b.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct ValvePaths<'a> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 13 |     flow_rate: u32,
[INFO] [stdout] 14 |     connections: Vec<&'a str>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ValvePaths` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value`, `path_length`, and `node` are never read
[INFO] [stdout]   --> src/main16b.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct PathElement<'a> {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 20 |     value: u32, // value of the current valve
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     // total_value: u32,
[INFO] [stdout] 22 |     path_length: usize, // how much time is lost getting to the node
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 23 |     node: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PathElement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main16a.rs:120:10
[INFO] [stdout]     |
[INFO] [stdout] 120 |     for (i, dest) in remaining_destinations.iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `connections` is never read
[INFO] [stdout]   --> src/main16a.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct ValvePaths<'a> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 13 |     flow_rate: u32,
[INFO] [stdout] 14 |     connections: Vec<&'a str>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ValvePaths` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value`, `path_length`, and `node` are never read
[INFO] [stdout]   --> src/main16a.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct PathElement<'a> {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 20 |     value: u32, // value of the current valve
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     // total_value: u32,
[INFO] [stdout] 22 |     path_length: usize, // how much time is lost getting to the node
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 23 |     node: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PathElement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main3a.rs:37:27
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout]    |                           ^                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 -         let priority = if (intersect.is_ascii_lowercase()) {
[INFO] [stdout] 37 +         let priority = if intersect.is_ascii_lowercase()  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main3a.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut score_total = 0;
[INFO] [stdout]   |         ----^^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score_total`
[INFO] [stdout]  --> src/main3a.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut score_total = 0;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_score_total`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/main5b.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5b.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut from_vec = columns.get_mut(&from).unwrap();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5b.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut to_vec = columns.get_mut(&to).unwrap();
[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/main6a.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut input = read_to_string("input6a.txt").unwrap();
[INFO] [stdout]   |         ----^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main9b.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         for i in 0..distance {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_calories` is never read
[INFO] [stdout]   --> src/main1b.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         max_calories = current_calories;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `half_overlap` is never used
[INFO] [stdout]  --> src/main4a.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn half_overlap(a1: i32, a2: i32, b1: i32, _b2: i32) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/main13b.rs:124:42
[INFO] [stdout]     |
[INFO] [stdout] 124 |             (Self::Number(n), Self::List(m)) => {
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main13b.rs:127:25
[INFO] [stdout]     |
[INFO] [stdout] 127 |             (Self::List(n), Self::Number(m)) => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main13b.rs:144:10
[INFO] [stdout]     |
[INFO] [stdout] 144 |     for (i, pairs) in input.split("\n\n").enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     H: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case: `h`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     W: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:33:64
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn tree_visibility(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> i32 {
[INFO] [stdout]    |                                                                ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:33:74
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn tree_visibility(i: usize, j: usize, treemap: &Vec<Vec<u8>>, H: usize, W: usize) -> i32 {
[INFO] [stdout]    |                                                                          ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let H = treeline.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `W` should have a snake case name
[INFO] [stdout]   --> src/main8b.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let W = treeline[0].len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/main5a.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main9a.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for i in 0..distance {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5a.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut from_vec = columns.get_mut(&from).unwrap();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main5a.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut to_vec = columns.get_mut(&to).unwrap();
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counter` is assigned to, but never used
[INFO] [stdout]    --> src/main12a.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     let mut counter = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_counter` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `counter` is never read
[INFO] [stdout]    --> src/main12a.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         counter += 1;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/main13a.rs:124:42
[INFO] [stdout]     |
[INFO] [stdout] 124 |             (Self::Number(n), Self::List(m)) => {
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main13a.rs:127:25
[INFO] [stdout]     |
[INFO] [stdout] 127 |             (Self::List(n), Self::Number(m)) => {
[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/main13a.rs:124:42
[INFO] [stdout]     |
[INFO] [stdout] 124 |             (Self::Number(n), Self::List(m)) => {
[INFO] [stdout]     |                                          ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main13a.rs:127:25
[INFO] [stdout]     |
[INFO] [stdout] 127 |             (Self::List(n), Self::Number(m)) => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.67s
[INFO] running `Command { std: "docker" "inspect" "dfce92d1c44aeaaaf57fb4ca50371bad6824a769f7c80a9eb40a3d2732391002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfce92d1c44aeaaaf57fb4ca50371bad6824a769f7c80a9eb40a3d2732391002", kill_on_drop: false }`
[INFO] [stdout] dfce92d1c44aeaaaf57fb4ca50371bad6824a769f7c80a9eb40a3d2732391002
