[INFO] cloning repository https://github.com/Pandaroses/euler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Pandaroses/euler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPandaroses%2Feuler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPandaroses%2Feuler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 93aec0f533f6c4b0a745afe9449a49eae91a1cf5
[INFO] checking Pandaroses/euler against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPandaroses%2Feuler" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Pandaroses/euler
[INFO] finished tweaking git repo https://github.com/Pandaroses/euler
[INFO] tweaked toml for git repo https://github.com/Pandaroses/euler written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Pandaroses/euler on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Pandaroses/euler 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c27441ee5b14476f7a6a90204f5a4c9f750293d901f5113b1d86cdb82f481ed9
[INFO] running `Command { std: "docker" "start" "-a" "c27441ee5b14476f7a6a90204f5a4c9f750293d901f5113b1d86cdb82f481ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c27441ee5b14476f7a6a90204f5a4c9f750293d901f5113b1d86cdb82f481ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c27441ee5b14476f7a6a90204f5a4c9f750293d901f5113b1d86cdb82f481ed9", kill_on_drop: false }`
[INFO] [stdout] c27441ee5b14476f7a6a90204f5a4c9f750293d901f5113b1d86cdb82f481ed9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5528f0daf6859f7257cfe288692dfc72062ae6e8da8d65f5d147a7792566e827
[INFO] running `Command { std: "docker" "start" "-a" "5528f0daf6859f7257cfe288692dfc72062ae6e8da8d65f5d147a7792566e827", kill_on_drop: false }`
[INFO] [stderr]     Checking euler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Read, Write};
[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 import: `self`
[INFO] [stdout]  --> src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/forces/c2149d.rs:32:22
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let out = if (a_steps < b_steps) {
[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] 32 -         let out = if (a_steps < b_steps) {
[INFO] [stdout] 32 +         let out = if a_steps < b_steps {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Read, Write};
[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 import: `self`
[INFO] [stdout]  --> src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/forces/c2149d.rs:32:22
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let out = if (a_steps < b_steps) {
[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] 32 -         let out = if (a_steps < b_steps) {
[INFO] [stdout] 32 +         let out = if a_steps < b_steps {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prime` is never read
[INFO] [stdout]  --> src/euler/e10.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut prime = true;
[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/euler/e51.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut idx: Vec<Vec<usize>> = vec![];
[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: `idx`
[INFO] [stdout]   --> src/euler/e51.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut idx: Vec<Vec<usize>> = vec![];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[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 `count` is never read
[INFO] [stdout]   --> src/euler/e51.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         count = 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 `n` is never read
[INFO] [stdout]   --> src/forces/c2149d.rs:83:17
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut n = 0;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/forces/c2149d.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     for i in 0..t {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fun`
[INFO] [stdout]   --> src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let fun = forces::c2151a::main();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_fun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_10` is never used
[INFO] [stdout]  --> src/euler/e10.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn euler_10() -> usize {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_10_ai` is never used
[INFO] [stdout]   --> src/euler/e10.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn euler_10_ai() -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_11` is never used
[INFO] [stdout]  --> src/euler/e11.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn euler_11() -> usize {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_11_flat` is never used
[INFO] [stdout]   --> src/euler/e11.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn euler_11_flat() -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_12` is never used
[INFO] [stdout]  --> src/euler/e12.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn euler_12() -> usize {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_51` is never used
[INFO] [stdout]  --> src/euler/e51.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn euler_51() -> usize {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combination` is never used
[INFO] [stdout]   --> src/euler/e51.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn combination(i: usize, r: usize, d: usize, data: &mut Vec<usize>, res: &mut Vec<Vec<usize>>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/forces/c2149d.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve(i: String) -> usize {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_pos` is never used
[INFO] [stdout]   --> src/forces/c2149d.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn get_pos(l: usize, r: &[u8], start: usize, big: usize, what: u8, b_pos: &mut Vec<usize>) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_scatter` is never used
[INFO] [stdout]   --> src/forces/c2149d.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn find_scatter(l: usize, r: &[u8], case: u8) -> (usize, usize, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_steps` is never used
[INFO] [stdout]   --> src/forces/c2149d.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn count_steps(big: usize, start: usize, pos: Vec<usize>) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> src/forces/c2149d.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn main() {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prime` is never read
[INFO] [stdout]  --> src/euler/e10.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut prime = true;
[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] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/forces/c2149d.rs:106:17
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let f = read::<String>().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/forces/c2149d.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let f = read::<String>().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/euler/e51.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut idx: Vec<Vec<usize>> = vec![];
[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: `idx`
[INFO] [stdout]   --> src/euler/e51.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut idx: Vec<Vec<usize>> = vec![];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[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 `count` is never read
[INFO] [stdout]   --> src/euler/e51.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         count = 0;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `euler` (bin "euler") due to 2 previous errors; 22 warnings emitted
[INFO] [stdout] warning: value assigned to `n` is never read
[INFO] [stdout]   --> src/forces/c2149d.rs:83:17
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut n = 0;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/forces/c2149d.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     for i in 0..t {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fun`
[INFO] [stdout]   --> src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let fun = forces::c2151a::main();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_fun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_10` is never used
[INFO] [stdout]  --> src/euler/e10.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn euler_10() -> usize {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_10_ai` is never used
[INFO] [stdout]   --> src/euler/e10.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn euler_10_ai() -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_11` is never used
[INFO] [stdout]  --> src/euler/e11.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn euler_11() -> usize {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_11_flat` is never used
[INFO] [stdout]   --> src/euler/e11.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn euler_11_flat() -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_12` is never used
[INFO] [stdout]  --> src/euler/e12.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn euler_12() -> usize {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `euler_51` is never used
[INFO] [stdout]  --> src/euler/e51.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn euler_51() -> usize {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combination` is never used
[INFO] [stdout]   --> src/euler/e51.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn combination(i: usize, r: usize, d: usize, data: &mut Vec<usize>, res: &mut Vec<Vec<usize>>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/forces/c2149d.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve(i: String) -> usize {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_pos` is never used
[INFO] [stdout]   --> src/forces/c2149d.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn get_pos(l: usize, r: &[u8], start: usize, big: usize, what: u8, b_pos: &mut Vec<usize>) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_scatter` is never used
[INFO] [stdout]   --> src/forces/c2149d.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn find_scatter(l: usize, r: &[u8], case: u8) -> (usize, usize, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_steps` is never used
[INFO] [stdout]   --> src/forces/c2149d.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn count_steps(big: usize, start: usize, pos: Vec<usize>) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> src/forces/c2149d.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn main() {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/forces/c2149d.rs:106:17
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let f = read::<String>().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/forces/c2149d.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let f = read::<String>().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `euler` (bin "euler" test) due to 2 previous errors; 22 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5528f0daf6859f7257cfe288692dfc72062ae6e8da8d65f5d147a7792566e827", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5528f0daf6859f7257cfe288692dfc72062ae6e8da8d65f5d147a7792566e827", kill_on_drop: false }`
[INFO] [stdout] 5528f0daf6859f7257cfe288692dfc72062ae6e8da8d65f5d147a7792566e827
