[INFO] cloning repository https://github.com/tomvidm/rust-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/tomvidm/rust-sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomvidm%2Frust-sudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomvidm%2Frust-sudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9778d53891d8a991798dcffb2afeb743bbc9da94
[INFO] testing tomvidm/rust-sudoku-solver against beta-2023-04-20 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomvidm%2Frust-sudoku-solver" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomvidm/rust-sudoku-solver on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tomvidm/rust-sudoku-solver
[INFO] finished tweaking git repo https://github.com/tomvidm/rust-sudoku-solver
[INFO] tweaked toml for git repo https://github.com/tomvidm/rust-sudoku-solver written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tomvidm/rust-sudoku-solver 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" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.73
[INFO] [stderr]   Downloaded serde_derive v1.0.73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb30e8863ce4af48d90c890a9401132a9f449e974b83791c742f7def3d3ee292
[INFO] running `Command { std: "docker" "start" "-a" "fb30e8863ce4af48d90c890a9401132a9f449e974b83791c742f7def3d3ee292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb30e8863ce4af48d90c890a9401132a9f449e974b83791c742f7def3d3ee292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb30e8863ce4af48d90c890a9401132a9f449e974b83791c742f7def3d3ee292", kill_on_drop: false }`
[INFO] [stdout] fb30e8863ce4af48d90c890a9401132a9f449e974b83791c742f7def3d3ee292
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43d2f7bf86c005f8519af20d33dea0f87a5787ce27ad439cad1676005a27fc32
[INFO] running `Command { std: "docker" "start" "-a" "43d2f7bf86c005f8519af20d33dea0f87a5787ce27ad439cad1676005a27fc32", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling ryu v0.2.4
[INFO] [stderr]    Compiling serde v1.0.73
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serde_derive v1.0.73
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/su/board.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 |         self.allowed_in_row[(row as usize)][(value as usize) - 1]
[INFO] [stdout]     |                             ^            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 100 -         self.allowed_in_row[(row as usize)][(value as usize) - 1]
[INFO] [stdout] 100 +         self.allowed_in_row[row as usize][(value as usize) - 1]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/su/board.rs:104:29
[INFO] [stdout]     |
[INFO] [stdout] 104 |         self.allowed_in_col[(col as usize)][(value as usize) - 1]
[INFO] [stdout]     |                             ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 -         self.allowed_in_col[(col as usize)][(value as usize) - 1]
[INFO] [stdout] 104 +         self.allowed_in_col[col as usize][(value as usize) - 1]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/su/board.rs:108:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |         self.allowed_in_square[(square as usize)][(value as usize) - 1]
[INFO] [stdout]     |                                ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -         self.allowed_in_square[(square as usize)][(value as usize) - 1]
[INFO] [stdout] 108 +         self.allowed_in_square[square as usize][(value as usize) - 1]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coord`
[INFO] [stdout]   --> src/su/board.rs:80:21
[INFO] [stdout]    |
[INFO] [stdout] 80 |                 let coord = Coord::new(r, c);
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_coord`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_entry`
[INFO] [stdout]    --> src/su/board.rs:174:17
[INFO] [stdout]     |
[INFO] [stdout] 174 |             let old_entry = Move::new_from_coord_and_value(coord, old_value);
[INFO] [stdout]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_entry`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw_board_struct`
[INFO] [stdout]   --> src/su/sugame.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let raw_board_struct = raw_board.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_board_struct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let board = su::Board::new();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]  --> src/su/sugame.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct RawBoard {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 9 |     data: [[i8; 9]; 9]
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Game` is never constructed
[INFO] [stdout]   --> src/su/sugame.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Game {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `test_game` is never used
[INFO] [stdout]   --> src/su/sugame.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Game {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 17 |     fn test_game() -> Option<Game> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.64s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "43d2f7bf86c005f8519af20d33dea0f87a5787ce27ad439cad1676005a27fc32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43d2f7bf86c005f8519af20d33dea0f87a5787ce27ad439cad1676005a27fc32", kill_on_drop: false }`
[INFO] [stdout] 43d2f7bf86c005f8519af20d33dea0f87a5787ce27ad439cad1676005a27fc32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f079d9faf6c67f27d87d4c278e4c1319da46864d01200c5c9a721e153b4faa1
[INFO] running `Command { std: "docker" "start" "-a" "5f079d9faf6c67f27d87d4c278e4c1319da46864d01200c5c9a721e153b4faa1", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/su/board.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 |         self.allowed_in_row[(row as usize)][(value as usize) - 1]
[INFO] [stdout]     |                             ^            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 100 -         self.allowed_in_row[(row as usize)][(value as usize) - 1]
[INFO] [stdout] 100 +         self.allowed_in_row[row as usize][(value as usize) - 1]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/su/board.rs:104:29
[INFO] [stdout]     |
[INFO] [stdout] 104 |         self.allowed_in_col[(col as usize)][(value as usize) - 1]
[INFO] [stdout]     |                             ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 -         self.allowed_in_col[(col as usize)][(value as usize) - 1]
[INFO] [stdout] 104 +         self.allowed_in_col[col as usize][(value as usize) - 1]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/su/board.rs:108:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |         self.allowed_in_square[(square as usize)][(value as usize) - 1]
[INFO] [stdout]     |                                ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 108 -         self.allowed_in_square[(square as usize)][(value as usize) - 1]
[INFO] [stdout] 108 +         self.allowed_in_square[square as usize][(value as usize) - 1]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coord`
[INFO] [stdout]   --> src/su/board.rs:80:21
[INFO] [stdout]    |
[INFO] [stdout] 80 |                 let coord = Coord::new(r, c);
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_coord`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_entry`
[INFO] [stdout]    --> src/su/board.rs:174:17
[INFO] [stdout]     |
[INFO] [stdout] 174 |             let old_entry = Move::new_from_coord_and_value(coord, old_value);
[INFO] [stdout]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_entry`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]    --> src/su/board.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut board = Board::new_from_array(valid_raw_board);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw_board_struct`
[INFO] [stdout]   --> src/su/sugame.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let raw_board_struct = raw_board.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_board_struct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game`
[INFO] [stdout]   --> src/su/sugame.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let game = Game::test_game();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_game`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let board = su::Board::new();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/su/board.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut board = Board::new_from_array(valid_raw_board);
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]  --> src/su/sugame.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct RawBoard {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 9 |     data: [[i8; 9]; 9]
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `board` is never read
[INFO] [stdout]   --> src/su/sugame.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Game {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 13 |     board: Board,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "5f079d9faf6c67f27d87d4c278e4c1319da46864d01200c5c9a721e153b4faa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f079d9faf6c67f27d87d4c278e4c1319da46864d01200c5c9a721e153b4faa1", kill_on_drop: false }`
[INFO] [stdout] 5f079d9faf6c67f27d87d4c278e4c1319da46864d01200c5c9a721e153b4faa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2ec9b0dd875078fe0b92d7c56aace78f87a190ca78d426cf65b34149420d421d
[INFO] running `Command { std: "docker" "start" "-a" "2ec9b0dd875078fe0b92d7c56aace78f87a190ca78d426cf65b34149420d421d", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around index expression
[INFO] [stderr]    --> src/su/board.rs:100:29
[INFO] [stderr]     |
[INFO] [stderr] 100 |         self.allowed_in_row[(row as usize)][(value as usize) - 1]
[INFO] [stderr]     |                             ^            ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 100 -         self.allowed_in_row[(row as usize)][(value as usize) - 1]
[INFO] [stderr] 100 +         self.allowed_in_row[row as usize][(value as usize) - 1]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around index expression
[INFO] [stderr]    --> src/su/board.rs:104:29
[INFO] [stderr]     |
[INFO] [stderr] 104 |         self.allowed_in_col[(col as usize)][(value as usize) - 1]
[INFO] [stderr]     |                             ^            ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 104 -         self.allowed_in_col[(col as usize)][(value as usize) - 1]
[INFO] [stderr] 104 +         self.allowed_in_col[col as usize][(value as usize) - 1]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around index expression
[INFO] [stderr]    --> src/su/board.rs:108:32
[INFO] [stderr]     |
[INFO] [stderr] 108 |         self.allowed_in_square[(square as usize)][(value as usize) - 1]
[INFO] [stderr]     |                                ^               ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 108 -         self.allowed_in_square[(square as usize)][(value as usize) - 1]
[INFO] [stderr] 108 +         self.allowed_in_square[square as usize][(value as usize) - 1]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `coord`
[INFO] [stderr]   --> src/su/board.rs:80:21
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 let coord = Coord::new(r, c);
[INFO] [stderr]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_coord`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_entry`
[INFO] [stderr]    --> src/su/board.rs:174:17
[INFO] [stderr]     |
[INFO] [stderr] 174 |             let old_entry = Move::new_from_coord_and_value(coord, old_value);
[INFO] [stderr]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_entry`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `board`
[INFO] [stderr]    --> src/su/board.rs:205:13
[INFO] [stderr]     |
[INFO] [stderr] 205 |     let mut board = Board::new_from_array(valid_raw_board);
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `raw_board_struct`
[INFO] [stderr]   --> src/su/sugame.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let raw_board_struct = raw_board.clone();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_board_struct`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `game`
[INFO] [stderr]   --> src/su/sugame.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let game = Game::test_game();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_game`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `board`
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let board = su::Board::new();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/su/board.rs:205:9
[INFO] [stderr]     |
[INFO] [stderr] 205 |     let mut board = Board::new_from_array(valid_raw_board);
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `data` is never read
[INFO] [stderr]  --> src/su/sugame.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct RawBoard {
[INFO] [stderr]   |        -------- field in this struct
[INFO] [stderr] 9 |     data: [[i8; 9]; 9]
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `board` is never read
[INFO] [stderr]   --> src/su/sugame.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct Game {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] 13 |     board: Board,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 12 warnings (run `cargo fix --bin "sudoku" --tests` to apply 10 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sudoku-9ff23f57894e7e60)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test su::board::test_valid_board ... ok
[INFO] [stdout] test su::sugame::test_this ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- su::sugame::test_this stdout ----
[INFO] [stdout] [[1,0,0,0,0,0,0,0,0],[0,2,0,0,0,0,0,0,0],[0,0,3,0,0,0,0,0,0],[0,0,0,4,0,0,0,0,0],[0,0,0,0,5,0,0,0,0],[0,0,0,0,0,6,0,0,0],[0,0,0,0,0,0,7,0,0],[0,0,0,0,0,0,0,8,0],[0,0,0,0,0,0,0,0,9]]
[INFO] [stdout] thread 'su::sugame::test_this' panicked at 'assertion failed: false', src/su/sugame.rs:51:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x556b1d3f023a - std::backtrace_rs::backtrace::libunwind::trace::h2f05d0192276a8f6
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x556b1d3f023a - std::backtrace_rs::backtrace::trace_unsynchronized::hedc23dff7a1af150
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x556b1d3f023a - std::sys_common::backtrace::_print_fmt::h17541ef7592f3ce2
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x556b1d3f023a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h20f75df5ab0c0792
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x556b1d413e8f - core::fmt::write::h78109e6f466b3af6
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/fmt/mod.rs:1254:17
[INFO] [stdout]    5:     0x556b1d3ed585 - std::io::Write::write_fmt::hd24bfb68a1b35a25
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/io/mod.rs:1698:15
[INFO] [stdout]    6:     0x556b1d3f0005 - std::sys_common::backtrace::_print::h8dac57a9f8fbf9a5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x556b1d3f0005 - std::sys_common::backtrace::print::hf9ecbf41d1aa712f
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x556b1d3f1cbe - std::panicking::default_hook::{{closure}}::h04c07acfc84ca028
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:269:22
[INFO] [stdout]    9:     0x556b1d3f19f1 - std::panicking::default_hook::h01f6bb23e1eceb2c
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:285:9
[INFO] [stdout]   10:     0x556b1d3c0adb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h87fe9f7b2fd49e4c
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   11:     0x556b1d3c0adb - test::test_main::{{closure}}::he94d679243a7531b
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x556b1d3f23a4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3f2d6d8b14c4769f
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   13:     0x556b1d3f23a4 - std::panicking::rust_panic_with_hook::h2bb3722bbaf2f6df
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:695:13
[INFO] [stdout]   14:     0x556b1d3f20d2 - std::panicking::begin_panic_handler::{{closure}}::h91bc7f36a4be011b
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:580:13
[INFO] [stdout]   15:     0x556b1d3f06a6 - std::sys_common::backtrace::__rust_end_short_backtrace::h8b3d3717114f9e59
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   16:     0x556b1d3f1e72 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:578:5
[INFO] [stdout]   17:     0x556b1d388ba3 - core::panicking::panic_fmt::hfd368e3fbdabea26
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panicking.rs:67:14
[INFO] [stdout]   18:     0x556b1d388c3d - core::panicking::panic::h3f9042d09bd0bf2e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panicking.rs:117:5
[INFO] [stdout]   19:     0x556b1d38d639 - sudoku::su::sugame::test_this::h93d50b7fc6e72c2b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/su/sugame.rs:51:5
[INFO] [stdout]   20:     0x556b1d38d5e7 - sudoku::su::sugame::test_this::{{closure}}::hcc009e67be11f4b9
[INFO] [stdout]                                at /opt/rustwide/workdir/src/su/sugame.rs:48:16
[INFO] [stdout]   21:     0x556b1d38b145 - core::ops::function::FnOnce::call_once::h3b7e258bf8e95fdc
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x556b1d3c59af - core::ops::function::FnOnce::call_once::ha6a70e79f7481a7e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x556b1d3c59af - test::__rust_begin_short_backtrace::hce33033019b61e69
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:655:18
[INFO] [stdout]   24:     0x556b1d39319c - test::run_test::{{closure}}::h858d3528838ae3e5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:646:30
[INFO] [stdout]   25:     0x556b1d39319c - core::ops::function::FnOnce::call_once{{vtable.shim}}::he8ac2b00f01ae79e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x556b1d3c4a86 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8093d25b522725ef
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1973:9
[INFO] [stdout]   27:     0x556b1d3c4a86 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h5c334c204e4a3913
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   28:     0x556b1d3c4a86 - std::panicking::try::do_call::ha8b740c7b9478074
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:485:40
[INFO] [stdout]   29:     0x556b1d3c4a86 - std::panicking::try::h5d34f63d0e41b64e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:449:19
[INFO] [stdout]   30:     0x556b1d3c4a86 - std::panic::catch_unwind::hcfbb511e1aa7fc67
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panic.rs:140:14
[INFO] [stdout]   31:     0x556b1d3c4a86 - test::run_test_in_process::h9abda90f802eaf21
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:678:27
[INFO] [stdout]   32:     0x556b1d3c4a86 - test::run_test::run_test_inner::{{closure}}::h0f058de91f6c6edf
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:572:39
[INFO] [stdout]   33:     0x556b1d38d9a5 - test::run_test::run_test_inner::{{closure}}::h5ca48a4c59c6c1fb
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/test/src/lib.rs:599:37
[INFO] [stdout]   34:     0x556b1d38d9a5 - std::sys_common::backtrace::__rust_begin_short_backtrace::h32bd51e1495d4a33
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:134:18
[INFO] [stdout]   35:     0x556b1d392ee1 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc086fae9b128b2db
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/thread/mod.rs:526:17
[INFO] [stdout]   36:     0x556b1d392ee1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb66571888d270d43
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   37:     0x556b1d392ee1 - std::panicking::try::do_call::h4fa2ef4f6e51fecf
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:485:40
[INFO] [stdout]   38:     0x556b1d392ee1 - std::panicking::try::h1e9e22b8584489b5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:449:19
[INFO] [stdout]   39:     0x556b1d392ee1 - std::panic::catch_unwind::h44698a3de0e0769e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panic.rs:140:14
[INFO] [stdout]   40:     0x556b1d392ee1 - std::thread::Builder::spawn_unchecked_::{{closure}}::h50153abde3fe239e
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/thread/mod.rs:525:30
[INFO] [stdout]   41:     0x556b1d392ee1 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hbe5bbf6f38394364
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x556b1d3f6875 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h0d83cb2920a49046
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1973:9
[INFO] [stdout]   43:     0x556b1d3f6875 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbe0a008aa7d9ef59
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/alloc/src/boxed.rs:1973:9
[INFO] [stdout]   44:     0x556b1d3f6875 - std::sys::unix::thread::Thread::new::thread_start::h3a466996bdf6b1f9
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f9383201b43 - <unknown>
[INFO] [stdout]   46:     0x7f9383292bb4 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     su::sugame::test_this
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin sudoku`
[INFO] running `Command { std: "docker" "inspect" "2ec9b0dd875078fe0b92d7c56aace78f87a190ca78d426cf65b34149420d421d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ec9b0dd875078fe0b92d7c56aace78f87a190ca78d426cf65b34149420d421d", kill_on_drop: false }`
[INFO] [stdout] 2ec9b0dd875078fe0b92d7c56aace78f87a190ca78d426cf65b34149420d421d
