[INFO] cloning repository https://github.com/jamierobson/rust-journey
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[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamierobson%2Frust-journey'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94b8daa8984d180a60e8894351d3109167e05d29
[INFO] checking jamierobson/rust-journey against try#9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840 for pr-149518
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamierobson%2Frust-journey" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
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[INFO] started tweaking git repo https://github.com/jamierobson/rust-journey
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[INFO] validating manifest of git repo https://github.com/jamierobson/rust-journey on toolchain 9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jamierobson/rust-journey 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" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82a0a5cc93b361c057d675210f80ae8c5b28e93826ddf934a437d70aba34c226
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[INFO] running `Command { std: "docker" "inspect" "82a0a5cc93b361c057d675210f80ae8c5b28e93826ddf934a437d70aba34c226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82a0a5cc93b361c057d675210f80ae8c5b28e93826ddf934a437d70aba34c226", kill_on_drop: false }`
[INFO] [stdout] 82a0a5cc93b361c057d675210f80ae8c5b28e93826ddf934a437d70aba34c226
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1342f73e0d0fefcfc60f00d567be8555ad68bab158adbd33dfb20a144cb8eaf
[INFO] running `Command { std: "docker" "start" "-a" "d1342f73e0d0fefcfc60f00d567be8555ad68bab158adbd33dfb20a144cb8eaf", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking rust-journey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `RangeInclusive` and `collections::btree_map::Range`
[INFO] [stdout]  --> src/sudoku/core/cell.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::btree_map::Range, ops::{RangeBounds, RangeInclusive}};
[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: `crate::pretty::aliases::*`
[INFO] [stdout]  --> src/sudoku/core/cell_grid.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::pretty::aliases::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cell::RefCell` and `rc::Rc`
[INFO] [stdout]  --> src/sudoku/core/validatable_units.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{cell::RefCell, rc::Rc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cell::Cell`
[INFO] [stdout]  --> src/sudoku/core/validatable_units.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::{cell::Cell, cell_grid::CellReference};
[INFO] [stdout]   |             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `draw_all_cells`
[INFO] [stdout]  --> src/main.rs:5:51
[INFO] [stdout]   |
[INFO] [stdout] 5 | use sudoku::draw::terminal_print::{draw_all_rows, draw_all_cells};
[INFO] [stdout]   |                                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RangeInclusive` and `collections::btree_map::Range`
[INFO] [stdout]  --> src/sudoku/core/cell.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::btree_map::Range, ops::{RangeBounds, RangeInclusive}};
[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: `rc::Rc`
[INFO] [stdout]  --> src/sudoku/core/validatable_units.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{cell::RefCell, rc::Rc};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `clone`
[INFO] [stdout]   --> src/sudoku/format/serializer.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use std::{clone};
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `format::serializer`
[INFO] [stdout]   --> src/sudoku/format/serializer.rs:78:94
[INFO] [stdout]    |
[INFO] [stdout] 78 |     use crate::sudoku::{core::consts::{self, PUZZLE_MAXIMUM_VALUE, PUZZLE_TOTAL_CELL_COUNT}, format::serializer};
[INFO] [stdout]    |                                                                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `techniques::implicitly_solved::solve_single_candidate_cells`
[INFO] [stdout]    --> src/sudoku/techniques/conjugate_groups.rs:104:189
[INFO] [stdout]     |
[INFO] [stdout] 104 | ..., format::serializer::Serializer, techniques::implicitly_solved::solve_single_candidate_cells};
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `draw_all_cells`
[INFO] [stdout]  --> src/main.rs:5:51
[INFO] [stdout]   |
[INFO] [stdout] 5 | use sudoku::draw::terminal_print::{draw_all_rows, draw_all_cells};
[INFO] [stdout]   |                                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RangeBounds`
[INFO] [stdout]  --> src/sudoku/core/cell.rs:1:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::btree_map::Range, ops::{RangeBounds, RangeInclusive}};
[INFO] [stdout]   |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sudoku`
[INFO] [stdout]  --> src/sudoku/techniques/backtracking_brute_force.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve_by_brute_force(sudoku: &mut Puzzle) {
[INFO] [stdout]   |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sudoku`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `SeedRow` is never used
[INFO] [stdout]  --> src/sudoku/core/puzzle.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type SeedRow = [Option<u8>; PUZZLE_DIMENTION];
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `SeedGrid` is never used
[INFO] [stdout]  --> src/sudoku/core/puzzle.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type SeedGrid = [SeedRow; PUZZLE_DIMENTION];
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `columns`, `blocks`, and `unit_validator` are never read
[INFO] [stdout]   --> src/sudoku/core/puzzle.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Puzzle {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub columns: Vector<CellGroup>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 12 |     pub blocks: Vector<CellGroup>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 13 |     unit_validator: UnitValidator,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `count_cells_with_value` are never used
[INFO] [stdout]   --> src/sudoku/core/puzzle.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Puzzle {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn new(seed: &[[Option<u8>; PUZZLE_DIMENTION]; PUZZLE_DIMENTION]) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn count_cells_with_value(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_value`, `discount_value`, `discount_values`, `discount_range`, `add_candidate`, and `try_complete` are never used
[INFO] [stdout]   --> src/sudoku/core/cell.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Cell {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn from_value(value: Option<u8>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn discount_value(&mut self, value: u8) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     pub fn discount_values(&mut self, values: impl AsRef<[u8]>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn discount_range(&mut self, range: impl Iterator<Item = u8>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn add_candidate(&mut self, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn try_complete(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_from_collection` is never used
[INFO] [stdout]   --> src/sudoku/core/cell.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn remove_from_collection<T>(collection: &mut Vector<T>, value: T) where T: PartialEq {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_to_collection` is never used
[INFO] [stdout]   --> src/sudoku/core/cell.rs:92:4
[INFO] [stdout]    |
[INFO] [stdout] 92 | fn add_to_collection<T>(collection : &mut Vector<T>, value: T) where T: PartialEq {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_seed` is never used
[INFO] [stdout]   --> src/sudoku/core/cell_grid.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl CellGrid{
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn from_seed(initial_values: &SeedGrid) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grid_from_raw_values` is never used
[INFO] [stdout]   --> src/sudoku/core/cell_grid.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn grid_from_raw_values(initial_values: &SeedGrid) -> GridOfReferences {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `row_from_raw_values` is never used
[INFO] [stdout]   --> src/sudoku/core/cell_grid.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn row_from_raw_values(initial_values: SeedRow) -> RowOfReferences {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PUZZLE_TOTAL_CELL_COUNT` is never used
[INFO] [stdout]  --> src/sudoku/core/consts.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const PUZZLE_TOTAL_CELL_COUNT: usize = PUZZLE_DIMENTION * PUZZLE_DIMENTION;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `PuzzleValidator` is never used
[INFO] [stdout]  --> src/sudoku/core/validatable_units.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait PuzzleValidator {
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CellGroupValidator` is never used
[INFO] [stdout]   --> src/sudoku/core/validatable_units.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait CellGroupValidator {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NINE_X_NINE_CELL_REGEX` is never used
[INFO] [stdout]   --> src/sudoku/format/serializer.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const NINE_X_NINE_CELL_REGEX: StringSlice = "^[1-9.]{81}$";
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Serializer` is never constructed
[INFO] [stdout]   --> src/sudoku/format/serializer.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Serializer {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `can_parse`, `new_puzzle`, and `serialize` are never used
[INFO] [stdout]   --> src/sudoku/format/serializer.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Serializer {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn can_parse(&self, input: StringSlice) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn new_puzzle(&self, input: StringSlice) -> Result<Puzzle, String> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn serialize(&self, sudoku: &Puzzle) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `values_from_input` is never used
[INFO] [stdout]   --> src/sudoku/format/serializer.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn values_from_input(input: StringSlice) -> SeedGrid {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_single_candidate_cells` is never used
[INFO] [stdout]  --> src/sudoku/techniques/implicitly_solved.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn solve_single_candidate_cells(sudoku: &mut Puzzle) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_complete_all_cells` is never used
[INFO] [stdout]   --> src/sudoku/techniques/implicitly_solved.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn try_complete_all_cells(sudoku: &mut Puzzle){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eliminate_options_from_groups` is never used
[INFO] [stdout]   --> src/sudoku/techniques/implicitly_solved.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn eliminate_options_from_groups(collection: &mut Vector<CellGroup>){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_conjugate_groups` is never used
[INFO] [stdout]  --> src/sudoku/techniques/conjugate_groups.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve_conjugate_groups(sudoku: &mut Puzzle) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_eliminate_closed_candidate_groups` is never used
[INFO] [stdout]   --> src/sudoku/techniques/conjugate_groups.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn try_eliminate_closed_candidate_groups(sudoku: &mut Puzzle) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_eliminate_options_from_groups` is never used
[INFO] [stdout]   --> src/sudoku/techniques/conjugate_groups.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn try_eliminate_options_from_groups(cell_group_vector: &mut Vector<CellGroup>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_by_brute_force` is never used
[INFO] [stdout]  --> src/sudoku/techniques/backtracking_brute_force.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve_by_brute_force(sudoku: &mut Puzzle) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_all_cells` is never used
[INFO] [stdout]   --> src/sudoku/draw/terminal_print.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn draw_all_cells(cell_grid: &CellGrid){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_separator_line` is never used
[INFO] [stdout]   --> src/sudoku/draw/terminal_print.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn draw_separator_line(length: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `StringSlice` is never used
[INFO] [stdout]  --> src/pretty/aliases.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub type StringSlice<'a> = &'a str;
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SubsetComparable` is never used
[INFO] [stdout]  --> src/pretty/iterable.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait SubsetComparable<T> {
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RangeBounds`
[INFO] [stdout]  --> src/sudoku/core/cell.rs:1:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::btree_map::Range, ops::{RangeBounds, RangeInclusive}};
[INFO] [stdout]   |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sudoku`
[INFO] [stdout]  --> src/sudoku/techniques/backtracking_brute_force.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve_by_brute_force(sudoku: &mut Puzzle) {
[INFO] [stdout]   |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sudoku`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_candidate` is never used
[INFO] [stdout]   --> src/sudoku/core/cell.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Cell {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn add_candidate(&mut self, value: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_valid` is never used
[INFO] [stdout]  --> src/sudoku/core/validatable_units.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait PuzzleValidator {
[INFO] [stdout]   |           --------------- method in this trait
[INFO] [stdout] 6 |     fn is_valid(&self) -> bool;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_by_brute_force` is never used
[INFO] [stdout]  --> src/sudoku/techniques/backtracking_brute_force.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve_by_brute_force(sudoku: &mut Puzzle) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_all_cells` is never used
[INFO] [stdout]   --> src/sudoku/draw/terminal_print.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn draw_all_cells(cell_grid: &CellGrid){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_separator_line` is never used
[INFO] [stdout]   --> src/sudoku/draw/terminal_print.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn draw_separator_line(length: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.18s
[INFO] running `Command { std: "docker" "inspect" "d1342f73e0d0fefcfc60f00d567be8555ad68bab158adbd33dfb20a144cb8eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1342f73e0d0fefcfc60f00d567be8555ad68bab158adbd33dfb20a144cb8eaf", kill_on_drop: false }`
[INFO] [stdout] d1342f73e0d0fefcfc60f00d567be8555ad68bab158adbd33dfb20a144cb8eaf
