[INFO] cloning repository https://github.com/danplubell/sudodu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danplubell/sudodu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanplubell%2Fsudodu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanplubell%2Fsudodu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b35eb94802bbc8608bcd84da62894b95a1e3493a
[INFO] checking danplubell/sudodu/b35eb94802bbc8608bcd84da62894b95a1e3493a against master#d49be02cf6d2e2a01264fcdef1e20c826710c0f5 for pr-133570-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanplubell%2Fsudodu" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danplubell/sudodu on toolchain d49be02cf6d2e2a01264fcdef1e20c826710c0f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danplubell/sudodu
[INFO] finished tweaking git repo https://github.com/danplubell/sudodu
[INFO] tweaked toml for git repo https://github.com/danplubell/sudodu written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/danplubell/sudodu 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" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 402d7b91a044666b090e2641100b633c52576512992765f8656ab2e3cd7a445e
[INFO] running `Command { std: "docker" "start" "-a" "402d7b91a044666b090e2641100b633c52576512992765f8656ab2e3cd7a445e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "402d7b91a044666b090e2641100b633c52576512992765f8656ab2e3cd7a445e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "402d7b91a044666b090e2641100b633c52576512992765f8656ab2e3cd7a445e", kill_on_drop: false }`
[INFO] [stdout] 402d7b91a044666b090e2641100b633c52576512992765f8656ab2e3cd7a445e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12a6b6a97dab10dae3f0d9569bbc742b55e62c09e3bf896e78aa553d0cdec4e3
[INFO] running `Command { std: "docker" "start" "-a" "12a6b6a97dab10dae3f0d9569bbc742b55e62c09e3bf896e78aa553d0cdec4e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling thiserror v1.0.65
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.85
[INFO] [stderr]    Compiling thiserror-impl v1.0.65
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking sudodu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> src/solvers/solve_sudoku_backtrack.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | ;            for num in 1..=N {
[INFO] [stdout]   | ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/model/grid.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> src/solvers/solve_sudoku_backtrack.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | ;            for num in 1..=N {
[INFO] [stdout]   | ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/model/grid.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot test inner items
[INFO] [stdout]   --> src/model/is_safe.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         #[test]
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unnameable_test_items)]` on by default
[INFO] [stdout]    = note: this warning originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/model_inner/cells.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Cells {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 14 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn add_cell_by_value(&self, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn add_cell(&self, cell: Cell) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_inner_value_at(&self, index: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn set_inner_value_at(&self, index: usize, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn set_inner_at_row_col(&self, row: usize, col: usize, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn get_inner_at_row_col(&self, row: usize, col: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn get_at(&self, index: usize) -> Cell {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn values(&self) -> Vec<Cell> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub(crate) fn add_note_at_row_col(&self, row: usize, col: usize, value: u8) {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn get_notes_at_row_col(&self, row:usize, col:usize) -> Option<Rc<RefCell<Vec<u8>>>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn add_note_to_cell(&self, index:usize, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn clear_note(&self, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_value`, `replace_value`, `add_note_value`, `get_notes`, and `clear_note` are never used
[INFO] [stdout]   --> src/model_inner/cell.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Cell {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn get_value(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn replace_value(&self, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn add_note_value(&self, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn get_notes(&self) -> Rc<RefCell<Vec<u8>>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn clear_note(&self,value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/model_inner/columns.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Columns {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn add_to_column(&self, col: usize, cell: Cell) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_column(&self, col: usize) -> Cells {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn collect_columns(&self, cells: &Cells) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn values(&self) -> Vec<Cells> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn is_safe(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/model_inner/rows.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Rows {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new()->Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn add_to_row(&self, row: usize, cell: Cell) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn collect_rows(&self, cells: &Cells) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn values(&self)->Vec<Cells>{
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn get_row(&self, row:usize) -> Cells {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn get_value_at_row_col(&self,row:usize, col:usize)->u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn is_valid(&self)->bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn is_safe(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/model_inner/regions.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Regions {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn add_to_region(&self, region: usize, cell: Cell) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_region(&self, region: usize) -> Cells {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn clear_note(&self, region: usize, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn collect_regions(&self, cells: &Cells) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn is_safe(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/model_inner/grid.rs:15:12
[INFO] [stdout]     |
[INFO] [stdout] 14  | impl Grid {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout] 15  |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23  |     pub fn with_cells(&self, cells: &Cells) -> &Grid {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29  |     pub fn try_from(&mut self, value: &str) -> Result<(), ParsePuzzleError> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45  |     pub fn validate(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51  |     pub fn check_is_safe(&self, row: usize, col: usize, num: u8) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54  |     pub fn is_safe(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60  |     pub fn get_value_at_row_col(&self, row: usize, col: usize) -> u8 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63  |     pub fn set_value_at_row_col(&self, row: usize, col: usize, value: u8) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66  |     pub fn add_note_at_row_col(&self, row: usize, col: usize, value: u8) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69  |     pub fn raw_cells(&self) -> Cells {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn find_unassigned_location(&self) -> Option<(usize, usize)> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     pub fn get_row(&self, row: usize) -> Cells {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91  |     pub fn get_column(&self, col: usize) -> Cells {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94  |     pub fn get_region_by_row_col(&self, row: usize, col: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn clear_note(&self, row: usize, col: usize, value: u8) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn as_string(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `TooLong`, `TooShort`, and `HasAlpha` are never constructed
[INFO] [stdout]    --> src/model_inner/grid.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub enum ParsePuzzleError {
[INFO] [stdout]     |          ---------------- variants in this enum
[INFO] [stdout] 123 |     #[error("Value string is too long")]
[INFO] [stdout] 124 |     TooLong,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 125 |     #[error("Value string is too short")]
[INFO] [stdout] 126 |     TooShort,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 127 |     #[error("Value string contains alphabetic characters")]
[INFO] [stdout] 128 |     HasAlpha,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ParsePuzzleError` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NotFound` and `Multiple` are never constructed
[INFO] [stdout]   --> src/model_inner/validate_cells.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum ErrorReason {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] 11 |     #[error("Number not found")]
[INFO] [stdout] 12 |     NotFound,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 13 |     #[error("Multiple instances")]
[INFO] [stdout] 14 |     Multiple(String),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorReason` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_cells` is never used
[INFO] [stdout]   --> src/model_inner/validate_cells.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn validate_cells(cells: &Cells) -> Result<bool, ValidateCellsResults> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_safe_placement` is never used
[INFO] [stdout]  --> src/model_inner/is_safe.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn is_safe_placement(cells: Cells, row: usize, col: usize, value: u8) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_safe` is never used
[INFO] [stdout]   --> src/model_inner/is_safe.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn is_safe(cells: &Cells) -> Result<bool, ValidateCellsResults> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `N` is never used
[INFO] [stdout]  --> src/solvers/solve_sudoku_naive.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | const N: usize = 9;
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_sudoku_naive` is never used
[INFO] [stdout]  --> src/solvers/solve_sudoku_naive.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn solve_sudoku_naive(grid: &Grid, mut row:usize, mut col:usize) -> bool{
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `N` is never used
[INFO] [stdout]  --> src/solvers/solve_sudoku_backtrack.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | const N:usize = 9;
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_sudoku_backtrack` is never used
[INFO] [stdout]  --> src/solvers/solve_sudoku_backtrack.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve_sudoku_backtrack(grid: &Grid, mut _row:usize, mut _col:usize)->bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `N` is never used
[INFO] [stdout]  --> src/solvers/solve_sudoku_notes.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const N: usize = 9;
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_sudoku_notes` is never used
[INFO] [stdout]  --> src/solvers/solve_sudoku_notes.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve_sudoku_notes(grid: &Grid, mut _row: usize, mut _col: usize) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/model/grid.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Grid {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_safe` is never used
[INFO] [stdout]  --> src/model/is_safe.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn is_safe(cells: &Cells) -> bool{
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `something_else`
[INFO] [stdout]   --> src/solvers/solve_sudoku_backtrack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let something_else = "018040000350010040004000206000002007460030025800100000109000600080060091000090380";
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_something_else`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solution`
[INFO] [stdout]   --> src/solvers/solve_sudoku_backtrack.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let solution = "369125478548637921712489653497861532256743189183592764625918347934276815871354296";
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solution`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/solvers/solve_sudoku_backtrack.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let r = solve_sudoku_backtrack(&grid, 0, 0);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NotFound` and `Multiple` are never constructed
[INFO] [stdout]   --> src/model_inner/validate_cells.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum ErrorReason {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] 11 |     #[error("Number not found")]
[INFO] [stdout] 12 |     NotFound,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 13 |     #[error("Multiple instances")]
[INFO] [stdout] 14 |     Multiple(String),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorReason` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/model/grid.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Grid {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_is_safe_safe` is never used
[INFO] [stdout]   --> src/model/is_safe.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn test_is_safe_safe(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.54s
[INFO] running `Command { std: "docker" "inspect" "12a6b6a97dab10dae3f0d9569bbc742b55e62c09e3bf896e78aa553d0cdec4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12a6b6a97dab10dae3f0d9569bbc742b55e62c09e3bf896e78aa553d0cdec4e3", kill_on_drop: false }`
[INFO] [stdout] 12a6b6a97dab10dae3f0d9569bbc742b55e62c09e3bf896e78aa553d0cdec4e3