[INFO] cloning repository https://github.com/nkoppel/sudoku-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nkoppel/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkoppel%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkoppel%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f3d3e3be6823aa8b1c0df59beb9068b54f884d23
[INFO] testing nkoppel/sudoku-solver against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkoppel%2Fsudoku-solver" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nkoppel/sudoku-solver on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nkoppel/sudoku-solver
[INFO] finished tweaking git repo https://github.com/nkoppel/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/nkoppel/sudoku-solver written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/nkoppel/sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 923660f14c0726d852688f0577aa7bd80a20325b71d20f7e52a2cec9333977b4
[INFO] running `Command { std: "docker" "start" "-a" "923660f14c0726d852688f0577aa7bd80a20325b71d20f7e52a2cec9333977b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "923660f14c0726d852688f0577aa7bd80a20325b71d20f7e52a2cec9333977b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "923660f14c0726d852688f0577aa7bd80a20325b71d20f7e52a2cec9333977b4", kill_on_drop: false }`
[INFO] [stdout] 923660f14c0726d852688f0577aa7bd80a20325b71d20f7e52a2cec9333977b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d36cf0fbb8150e7534810b950818811b90fb0cdb823efe1545120e3839771609
[INFO] running `Command { std: "docker" "start" "-a" "d36cf0fbb8150e7534810b950818811b90fb0cdb823efe1545120e3839771609", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:105:14
[INFO] [stdout]     |
[INFO] [stdout] 105 |     board |= (board >> 3);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -     board |= (board >> 3);
[INFO] [stdout] 105 +     board |= board >> 3;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     board |= (board >> 6);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -     board |= (board >> 6);
[INFO] [stdout] 108 +     board |= board >> 6;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:135:14
[INFO] [stdout]     |
[INFO] [stdout] 135 |     board |= (board >> 27);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 135 -     board |= (board >> 27);
[INFO] [stdout] 135 +     board |= board >> 27;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:138:14
[INFO] [stdout]     |
[INFO] [stdout] 138 |     board |= (board >> 54);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -     board |= (board >> 54);
[INFO] [stdout] 138 +     board |= board >> 54;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `groups`
[INFO] [stdout]    --> src/solve.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     groups: [u128; 27],
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:105:14
[INFO] [stdout]     |
[INFO] [stdout] 105 |     board |= (board >> 3);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -     board |= (board >> 3);
[INFO] [stdout] 105 +     board |= board >> 3;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     board |= (board >> 6);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -     board |= (board >> 6);
[INFO] [stdout] 108 +     board |= board >> 6;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:135:14
[INFO] [stdout]     |
[INFO] [stdout] 135 |     board |= (board >> 27);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 135 -     board |= (board >> 27);
[INFO] [stdout] 135 +     board |= board >> 27;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:138:14
[INFO] [stdout]     |
[INFO] [stdout] 138 |     board |= (board >> 54);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -     board |= (board >> 54);
[INFO] [stdout] 138 +     board |= board >> 54;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `Read`, `stdin`
[INFO] [stdout]  --> src/main.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::{Lines, Read, BufRead, BufReader, stdin};
[INFO] [stdout]   |                      ^^^^           ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_from_lines`
[INFO] [stdout]   --> src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn test_from_lines<T>(lines: Lines<T>)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_from_lines`
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn solve_from_lines<T>(lines: Lines<T>)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NEW_BOARD`
[INFO] [stdout]   --> src/puzzle.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub const NEW_BOARD: u128 = 0x1_fffff_fffff_fffff_fffff;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `solved`
[INFO] [stdout]   --> src/puzzle.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     solved: u128
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Puzzle` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/puzzle.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[derive(Clone)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/puzzle.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/puzzle.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn from_str(s: &str) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/puzzle.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solved`
[INFO] [stdout]   --> src/puzzle.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn get_solved(&self) -> u128 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_new_solved`
[INFO] [stdout]   --> src/puzzle.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn get_new_solved(&mut self) -> u128 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]    --> src/puzzle.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_square_options`
[INFO] [stdout]    --> src/puzzle.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn get_square_options(&self) -> [u128; 9] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ROW`
[INFO] [stdout]  --> src/solve.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub const ROW: u128 = 0o777;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BOX`
[INFO] [stdout]  --> src/solve.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const BOX: u128 = 0o7007007;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_columns`
[INFO] [stdout]   --> src/solve.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn quick_columns(mut board: u128) -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_rows`
[INFO] [stdout]   --> src/solve.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn quick_rows(mut board: u128) -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_boxes`
[INFO] [stdout]   --> src/solve.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn quick_boxes(mut board: u128) -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_vert_triads`
[INFO] [stdout]    --> src/solve.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn quick_vert_triads(mut board: u128) -> (u128, u128) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_group_table`
[INFO] [stdout]    --> src/solve.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub fn gen_group_table() -> [u128; 27] {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_square_table`
[INFO] [stdout]    --> src/solve.rs:155:4
[INFO] [stdout]     |
[INFO] [stdout] 155 | fn gen_square_table() -> [u128; 81] {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solver`
[INFO] [stdout]    --> src/solve.rs:191:12
[INFO] [stdout]     |
[INFO] [stdout] 191 | pub struct Solver {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/solve.rs:199:12
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slow_is_valid`
[INFO] [stdout]    --> src/solve.rs:208:12
[INFO] [stdout]     |
[INFO] [stdout] 208 |     pub fn slow_is_valid(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update`
[INFO] [stdout]    --> src/solve.rs:226:12
[INFO] [stdout]     |
[INFO] [stdout] 226 |     pub fn update(&mut self) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `guess`
[INFO] [stdout]    --> src/solve.rs:291:12
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn guess(&mut self) -> (u8, u8) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve`
[INFO] [stdout]    --> src/solve.rs:315:12
[INFO] [stdout]     |
[INFO] [stdout] 315 |     pub fn solve(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]    --> src/solve.rs:344:12
[INFO] [stdout]     |
[INFO] [stdout] 344 |     pub fn test(&mut self, puzzle: &str, solution: &str) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.41s
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d36cf0fbb8150e7534810b950818811b90fb0cdb823efe1545120e3839771609", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d36cf0fbb8150e7534810b950818811b90fb0cdb823efe1545120e3839771609", kill_on_drop: false }`
[INFO] [stdout] d36cf0fbb8150e7534810b950818811b90fb0cdb823efe1545120e3839771609
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fe1ff13c0209168fe5d74b5f7e8d2ba2e29b7673ba1c63a403b6f37f87efcb3
[INFO] running `Command { std: "docker" "start" "-a" "6fe1ff13c0209168fe5d74b5f7e8d2ba2e29b7673ba1c63a403b6f37f87efcb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:105:14
[INFO] [stdout]     |
[INFO] [stdout] 105 |     board |= (board >> 3);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -     board |= (board >> 3);
[INFO] [stdout] 105 +     board |= board >> 3;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     board |= (board >> 6);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -     board |= (board >> 6);
[INFO] [stdout] 108 +     board |= board >> 6;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:135:14
[INFO] [stdout]     |
[INFO] [stdout] 135 |     board |= (board >> 27);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 135 -     board |= (board >> 27);
[INFO] [stdout] 135 +     board |= board >> 27;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:138:14
[INFO] [stdout]     |
[INFO] [stdout] 138 |     board |= (board >> 54);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -     board |= (board >> 54);
[INFO] [stdout] 138 +     board |= board >> 54;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `groups`
[INFO] [stdout]    --> src/solve.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     groups: [u128; 27],
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:105:14
[INFO] [stdout]     |
[INFO] [stdout] 105 |     board |= (board >> 3);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -     board |= (board >> 3);
[INFO] [stdout] 105 +     board |= board >> 3;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     board |= (board >> 6);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -     board |= (board >> 6);
[INFO] [stdout] 108 +     board |= board >> 6;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:135:14
[INFO] [stdout]     |
[INFO] [stdout] 135 |     board |= (board >> 27);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 135 -     board |= (board >> 27);
[INFO] [stdout] 135 +     board |= board >> 27;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:138:14
[INFO] [stdout]     |
[INFO] [stdout] 138 |     board |= (board >> 54);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -     board |= (board >> 54);
[INFO] [stdout] 138 +     board |= board >> 54;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:105:14
[INFO] [stdout]     |
[INFO] [stdout] 105 |     board |= (board >> 3);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -     board |= (board >> 3);
[INFO] [stdout] 105 +     board |= board >> 3;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:108:14
[INFO] [stdout]     |
[INFO] [stdout] 108 |     board |= (board >> 6);
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -     board |= (board >> 6);
[INFO] [stdout] 108 +     board |= board >> 6;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:135:14
[INFO] [stdout]     |
[INFO] [stdout] 135 |     board |= (board >> 27);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 135 -     board |= (board >> 27);
[INFO] [stdout] 135 +     board |= board >> 27;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/solve.rs:138:14
[INFO] [stdout]     |
[INFO] [stdout] 138 |     board |= (board >> 54);
[INFO] [stdout]     |              ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -     board |= (board >> 54);
[INFO] [stdout] 138 +     board |= board >> 54;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `Read`, `stdin`
[INFO] [stdout]  --> src/main.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::{Lines, Read, BufRead, BufReader, stdin};
[INFO] [stdout]   |                      ^^^^           ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `groups`
[INFO] [stdout]    --> src/solve.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     groups: [u128; 27],
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_from_lines`
[INFO] [stdout]   --> src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn test_from_lines<T>(lines: Lines<T>)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_from_lines`
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn solve_from_lines<T>(lines: Lines<T>)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NEW_BOARD`
[INFO] [stdout]   --> src/puzzle.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub const NEW_BOARD: u128 = 0x1_fffff_fffff_fffff_fffff;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `solved`
[INFO] [stdout]   --> src/puzzle.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     solved: u128
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Puzzle` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/puzzle.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[derive(Clone)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/puzzle.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/puzzle.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn from_str(s: &str) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/puzzle.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_solved`
[INFO] [stdout]   --> src/puzzle.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn get_solved(&self) -> u128 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_new_solved`
[INFO] [stdout]   --> src/puzzle.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn get_new_solved(&mut self) -> u128 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]    --> src/puzzle.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_square_options`
[INFO] [stdout]    --> src/puzzle.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn get_square_options(&self) -> [u128; 9] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ROW`
[INFO] [stdout]  --> src/solve.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub const ROW: u128 = 0o777;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BOX`
[INFO] [stdout]  --> src/solve.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const BOX: u128 = 0o7007007;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_columns`
[INFO] [stdout]   --> src/solve.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn quick_columns(mut board: u128) -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_rows`
[INFO] [stdout]   --> src/solve.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn quick_rows(mut board: u128) -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_boxes`
[INFO] [stdout]   --> src/solve.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn quick_boxes(mut board: u128) -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_vert_triads`
[INFO] [stdout]    --> src/solve.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn quick_vert_triads(mut board: u128) -> (u128, u128) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_group_table`
[INFO] [stdout]    --> src/solve.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub fn gen_group_table() -> [u128; 27] {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_square_table`
[INFO] [stdout]    --> src/solve.rs:155:4
[INFO] [stdout]     |
[INFO] [stdout] 155 | fn gen_square_table() -> [u128; 81] {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solver`
[INFO] [stdout]    --> src/solve.rs:191:12
[INFO] [stdout]     |
[INFO] [stdout] 191 | pub struct Solver {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/solve.rs:199:12
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slow_is_valid`
[INFO] [stdout]    --> src/solve.rs:208:12
[INFO] [stdout]     |
[INFO] [stdout] 208 |     pub fn slow_is_valid(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update`
[INFO] [stdout]    --> src/solve.rs:226:12
[INFO] [stdout]     |
[INFO] [stdout] 226 |     pub fn update(&mut self) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `guess`
[INFO] [stdout]    --> src/solve.rs:291:12
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn guess(&mut self) -> (u8, u8) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve`
[INFO] [stdout]    --> src/solve.rs:315:12
[INFO] [stdout]     |
[INFO] [stdout] 315 |     pub fn solve(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]    --> src/solve.rs:344:12
[INFO] [stdout]     |
[INFO] [stdout] 344 |     pub fn test(&mut self, puzzle: &str, solution: &str) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "6fe1ff13c0209168fe5d74b5f7e8d2ba2e29b7673ba1c63a403b6f37f87efcb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fe1ff13c0209168fe5d74b5f7e8d2ba2e29b7673ba1c63a403b6f37f87efcb3", kill_on_drop: false }`
[INFO] [stdout] 6fe1ff13c0209168fe5d74b5f7e8d2ba2e29b7673ba1c63a403b6f37f87efcb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4fc38a602bc08808df5b2a972a5cf545175c3b2422082fc4b96b16e3c8c4a322
[INFO] running `Command { std: "docker" "start" "-a" "4fc38a602bc08808df5b2a972a5cf545175c3b2422082fc4b96b16e3c8c4a322", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/solve.rs:105:14
[INFO] [stderr]     |
[INFO] [stderr] 105 |     board |= (board >> 3);
[INFO] [stderr]     |              ^          ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 105 -     board |= (board >> 3);
[INFO] [stderr] 105 +     board |= board >> 3;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/solve.rs:108:14
[INFO] [stderr]     |
[INFO] [stderr] 108 |     board |= (board >> 6);
[INFO] [stderr]     |              ^          ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 108 -     board |= (board >> 6);
[INFO] [stderr] 108 +     board |= board >> 6;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/solve.rs:135:14
[INFO] [stderr]     |
[INFO] [stderr] 135 |     board |= (board >> 27);
[INFO] [stderr]     |              ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 135 -     board |= (board >> 27);
[INFO] [stderr] 135 +     board |= board >> 27;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/solve.rs:138:14
[INFO] [stderr]     |
[INFO] [stderr] 138 |     board |= (board >> 54);
[INFO] [stderr]     |              ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 138 -     board |= (board >> 54);
[INFO] [stderr] 138 +     board |= board >> 54;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `groups`
[INFO] [stderr]    --> src/solve.rs:194:5
[INFO] [stderr]     |
[INFO] [stderr] 194 |     groups: [u128; 27],
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku-solver` (lib) generated 5 warnings
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufReader`, `Read`, `stdin`
[INFO] [stderr]  --> src/main.rs:8:22
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::io::{Lines, Read, BufRead, BufReader, stdin};
[INFO] [stderr]   |                      ^^^^           ^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_from_lines`
[INFO] [stderr]   --> src/main.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn test_from_lines<T>(lines: Lines<T>)
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve_from_lines`
[INFO] [stderr]   --> src/main.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn solve_from_lines<T>(lines: Lines<T>)
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `NEW_BOARD`
[INFO] [stderr]   --> src/puzzle.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub const NEW_BOARD: u128 = 0x1_fffff_fffff_fffff_fffff;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `solved`
[INFO] [stderr]   --> src/puzzle.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     solved: u128
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `Puzzle` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/puzzle.rs:18:10
[INFO] [stderr]    |
[INFO] [stderr] 18 | #[derive(Clone)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/puzzle.rs:25:18
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub const fn new() -> Self {
[INFO] [stderr]    |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from_str`
[INFO] [stderr]   --> src/puzzle.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn from_str(s: &str) -> Self {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_string`
[INFO] [stderr]   --> src/puzzle.rs:68:12
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn to_string(&self) -> String {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_solved`
[INFO] [stderr]   --> src/puzzle.rs:83:12
[INFO] [stderr]    |
[INFO] [stderr] 83 |     pub fn get_solved(&self) -> u128 {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_new_solved`
[INFO] [stderr]   --> src/puzzle.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn get_new_solved(&mut self) -> u128 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_valid`
[INFO] [stderr]    --> src/puzzle.rs:101:12
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn is_valid(&self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_square_options`
[INFO] [stderr]    --> src/puzzle.rs:111:12
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn get_square_options(&self) -> [u128; 9] {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ROW`
[INFO] [stderr]  --> src/solve.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub const ROW: u128 = 0o777;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `BOX`
[INFO] [stderr]  --> src/solve.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub const BOX: u128 = 0o7007007;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quick_columns`
[INFO] [stderr]   --> src/solve.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn quick_columns(mut board: u128) -> u128 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quick_rows`
[INFO] [stderr]   --> src/solve.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn quick_rows(mut board: u128) -> u128 {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quick_boxes`
[INFO] [stderr]   --> src/solve.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn quick_boxes(mut board: u128) -> u128 {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quick_vert_triads`
[INFO] [stderr]    --> src/solve.rs:113:8
[INFO] [stderr]     |
[INFO] [stderr] 113 | pub fn quick_vert_triads(mut board: u128) -> (u128, u128) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_group_table`
[INFO] [stderr]    --> src/solve.rs:143:8
[INFO] [stderr]     |
[INFO] [stderr] 143 | pub fn gen_group_table() -> [u128; 27] {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_square_table`
[INFO] [stderr]    --> src/solve.rs:155:4
[INFO] [stderr]     |
[INFO] [stderr] 155 | fn gen_square_table() -> [u128; 81] {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solver`
[INFO] [stderr]    --> src/solve.rs:191:12
[INFO] [stderr]     |
[INFO] [stderr] 191 | pub struct Solver {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/solve.rs:199:12
[INFO] [stderr]     |
[INFO] [stderr] 199 |     pub fn new() -> Self {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `slow_is_valid`
[INFO] [stderr]    --> src/solve.rs:208:12
[INFO] [stderr]     |
[INFO] [stderr] 208 |     pub fn slow_is_valid(&self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `update`
[INFO] [stderr]    --> src/solve.rs:226:12
[INFO] [stderr]     |
[INFO] [stderr] 226 |     pub fn update(&mut self) {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `guess`
[INFO] [stderr]    --> src/solve.rs:291:12
[INFO] [stderr]     |
[INFO] [stderr] 291 |     pub fn guess(&mut self) -> (u8, u8) {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `solve`
[INFO] [stderr]    --> src/solve.rs:315:12
[INFO] [stderr]     |
[INFO] [stderr] 315 |     pub fn solve(&mut self) -> bool {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `test`
[INFO] [stderr]    --> src/solve.rs:344:12
[INFO] [stderr]     |
[INFO] [stderr] 344 |     pub fn test(&mut self, puzzle: &str, solution: &str) {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku-solver` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr] warning: `sudoku-solver` (bin "sudoku-solver" test) generated 32 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_solver-ec310433114df6e9)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_solver-8734c6a00a7cd92f)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sudoku-solver
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> /opt/rustwide/workdir/src/solve.rs:105:14
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 105 |     board |= (board >> 3);
[INFO] [stdout] 
[INFO] [stderr]     |              ^          ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 105 -     board |= (board >> 3);
[INFO] [stderr] 105 +     board |= board >> 3;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/solve.rs:108:14
[INFO] [stderr]     |
[INFO] [stderr] 108 |     board |= (board >> 6);
[INFO] [stderr]     |              ^          ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 108 -     board |= (board >> 6);
[INFO] [stderr] 108 +     board |= board >> 6;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/solve.rs:135:14
[INFO] [stderr]     |
[INFO] [stderr] 135 |     board |= (board >> 27);
[INFO] [stderr]     |              ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 135 -     board |= (board >> 27);
[INFO] [stderr] 135 +     board |= board >> 27;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/solve.rs:138:14
[INFO] [stderr]     |
[INFO] [stderr] 138 |     board |= (board >> 54);
[INFO] [stderr]     |              ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 138 -     board |= (board >> 54);
[INFO] [stderr] 138 +     board |= board >> 54;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "4fc38a602bc08808df5b2a972a5cf545175c3b2422082fc4b96b16e3c8c4a322", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fc38a602bc08808df5b2a972a5cf545175c3b2422082fc4b96b16e3c8c4a322", kill_on_drop: false }`
[INFO] [stdout] 4fc38a602bc08808df5b2a972a5cf545175c3b2422082fc4b96b16e3c8c4a322