[INFO] cloning repository https://github.com/jamiehale/sudoku-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jamiehale/sudoku-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamiehale%2Fsudoku-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamiehale%2Fsudoku-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38e76cdbb07f554527bf5efac93a66a6aa4adb92
[INFO] checking jamiehale/sudoku-generator against master#4eb62535fc12dd1a63fd43a4173e224e79313c4d for pr-158816
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamiehale%2Fsudoku-generator" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jamiehale/sudoku-generator
[INFO] finished tweaking git repo https://github.com/jamiehale/sudoku-generator
[INFO] tweaked toml for git repo https://github.com/jamiehale/sudoku-generator written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jamiehale/sudoku-generator on toolchain 4eb62535fc12dd1a63fd43a4173e224e79313c4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jamiehale/sudoku-generator 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" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2
[INFO] running `Command { std: "docker" "start" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `random_set` is never used
[INFO] [stdout]  --> src/generator.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn random_set(rng: &mut rand::prelude::ThreadRng) -> Vec<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: function `num_used_in_row` is never used
[INFO] [stdout]   --> src/generator.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn num_used_in_row(n: u8, board: &Puzzle, row: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num_used_in_column` is never used
[INFO] [stdout]   --> src/generator.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn num_used_in_column(n: u8, board: &Puzzle, column: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num_used_in_house` is never used
[INFO] [stdout]   --> src/generator.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn num_used_in_house(n: u8, board: &Puzzle, house: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_valid_location_for` is never used
[INFO] [stdout]   --> src/generator.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn is_valid_location_for(n: u8, board: &Puzzle, row: usize, column: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_puzzle` is never used
[INFO] [stdout]   --> src/generator.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn solve_puzzle(board: &Puzzle, solution_count: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_board` is never used
[INFO] [stdout]   --> src/generator.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn generate_board(rng: &mut ThreadRng, board: &mut Puzzle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shuffle_all_cells` is never used
[INFO] [stdout]    --> src/generator.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn shuffle_all_cells(rng: &mut ThreadRng) -> Vec<(usize, usize)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_numbers` is never used
[INFO] [stdout]    --> src/generator.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn remove_numbers(rng: &mut ThreadRng, board: &Puzzle, hints: u8) -> Puzzle {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_puzzle` is never used
[INFO] [stdout]   --> src/notes.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl Notes {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn from_puzzle(puzzle: &Puzzle) -> Notes {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/pencil_marks.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl PencilMarks {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn from(marks: &[u8]) -> PencilMarks {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn all() -> PencilMarks {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn is_clear(&self, mark: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn is_n_tuple(&self, n: u8) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn is_single(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn is_pair(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     pub fn has(&self, values: &[u8]) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_values`, `has_empty`, `to_soduko`, and `cells` are never used
[INFO] [stdout]    --> src/puzzle.rs:26:12
[INFO] [stdout]     |
[INFO] [stdout]  19 | impl Puzzle {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  26 |     pub fn from_values(values: &Vec<Option<u8>>) -> Puzzle {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  51 |     pub fn has_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn to_soduko(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     pub fn cells(&self) -> &Vec<PuzzleCell> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `row_from_cell_index` is never used
[INFO] [stdout]   --> src/util.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn row_from_cell_index(i: usize) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `column_from_cell_index` is never used
[INFO] [stdout]   --> src/util.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn column_from_cell_index(i: usize) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_set` is never used
[INFO] [stdout]  --> src/generator.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn random_set(rng: &mut rand::prelude::ThreadRng) -> Vec<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: function `num_used_in_row` is never used
[INFO] [stdout]   --> src/generator.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn num_used_in_row(n: u8, board: &Puzzle, row: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num_used_in_column` is never used
[INFO] [stdout]   --> src/generator.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn num_used_in_column(n: u8, board: &Puzzle, column: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num_used_in_house` is never used
[INFO] [stdout]   --> src/generator.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn num_used_in_house(n: u8, board: &Puzzle, house: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_valid_location_for` is never used
[INFO] [stdout]   --> src/generator.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn is_valid_location_for(n: u8, board: &Puzzle, row: usize, column: usize) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve_puzzle` is never used
[INFO] [stdout]   --> src/generator.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn solve_puzzle(board: &Puzzle, solution_count: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_board` is never used
[INFO] [stdout]   --> src/generator.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn generate_board(rng: &mut ThreadRng, board: &mut Puzzle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shuffle_all_cells` is never used
[INFO] [stdout]    --> src/generator.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn shuffle_all_cells(rng: &mut ThreadRng) -> Vec<(usize, usize)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_numbers` is never used
[INFO] [stdout]    --> src/generator.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn remove_numbers(rng: &mut ThreadRng, board: &Puzzle, hints: u8) -> Puzzle {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_clear` is never used
[INFO] [stdout]   --> src/pencil_marks.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl PencilMarks {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn is_clear(&self, mark: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `has_empty` and `cells` are never used
[INFO] [stdout]    --> src/puzzle.rs:51:12
[INFO] [stdout]     |
[INFO] [stdout]  19 | impl Puzzle {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  51 |     pub fn has_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     pub fn cells(&self) -> &Vec<PuzzleCell> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.87s
[INFO] running `Command { std: "docker" "inspect" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2", kill_on_drop: false }`
[INFO] [stdout] 2e1768ed66e06a9370448a4169c7af2c6e5b1681a6ac081230cc490ebc157fb2
