[INFO] cloning repository https://github.com/48276AntonioMarques/rust-sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/48276AntonioMarques/rust-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F48276AntonioMarques%2Frust-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F48276AntonioMarques%2Frust-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79e7b6333b5a39c280d6aabe946a20076e19b7a7
[INFO] testing 48276AntonioMarques/rust-sudoku against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F48276AntonioMarques%2Frust-sudoku" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/48276AntonioMarques/rust-sudoku
[INFO] finished tweaking git repo https://github.com/48276AntonioMarques/rust-sudoku
[INFO] tweaked toml for git repo https://github.com/48276AntonioMarques/rust-sudoku written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/48276AntonioMarques/rust-sudoku on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/48276AntonioMarques/rust-sudoku 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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7adc64d02ba70a94c439e3521070740bea234432f89b4ce9424153292c7f035a
[INFO] running `Command { std: "docker" "start" "-a" "7adc64d02ba70a94c439e3521070740bea234432f89b4ce9424153292c7f035a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7adc64d02ba70a94c439e3521070740bea234432f89b4ce9424153292c7f035a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7adc64d02ba70a94c439e3521070740bea234432f89b4ce9424153292c7f035a", kill_on_drop: false }`
[INFO] [stdout] 7adc64d02ba70a94c439e3521070740bea234432f89b4ce9424153292c7f035a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a8845c488204e3d232cc3645f60f593abafd988e0cd4219aa2dcabc35ac744e
[INFO] running `Command { std: "docker" "start" "-a" "5a8845c488204e3d232cc3645f60f593abafd988e0cd4219aa2dcabc35ac744e", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `exception`
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Err(exception) => {
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exception`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/game/board.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Row {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 10 |     index: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Column` is never constructed
[INFO] [stdout]   --> src/game/board.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Column {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Grid` is never constructed
[INFO] [stdout]   --> src/game/board.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grid {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_column` and `get_grid` are never used
[INFO] [stdout]   --> src/game/board.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Board {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn get_column(&self, index: u8) -> Result<Column, Exception> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn get_grid(&self, index: u8) -> Result<Grid, Exception> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `EMPTY` is never constructed
[INFO] [stdout]  --> src/game/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum CellValue {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 4 |     EMPTY,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pos_to_number` is never used
[INFO] [stdout]   --> src/game/cell.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn pos_to_number(pos: u16) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_value`, `is_empty`, and `is_readonly` are never used
[INFO] [stdout]   --> src/game/cell.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Cell {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn get_value(&self) -> CellValue {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn is_readonly(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ColumnOutOfBounds` and `GridOutOfBounds` are never constructed
[INFO] [stdout]  --> src/exceptions.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Exception {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     ColumnOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 |     GridOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "5a8845c488204e3d232cc3645f60f593abafd988e0cd4219aa2dcabc35ac744e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a8845c488204e3d232cc3645f60f593abafd988e0cd4219aa2dcabc35ac744e", kill_on_drop: false }`
[INFO] [stdout] 5a8845c488204e3d232cc3645f60f593abafd988e0cd4219aa2dcabc35ac744e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0281e6499a82010f6a0ae99eaf174f19fb622ba6f18f023f7f24e8dbc30e9435
[INFO] running `Command { std: "docker" "start" "-a" "0281e6499a82010f6a0ae99eaf174f19fb622ba6f18f023f7f24e8dbc30e9435", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `exception`
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Err(exception) => {
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exception`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/game/board.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Row {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 10 |     index: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Column` is never constructed
[INFO] [stdout]   --> src/game/board.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Column {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Grid` is never constructed
[INFO] [stdout]   --> src/game/board.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grid {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_column` and `get_grid` are never used
[INFO] [stdout]   --> src/game/board.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Board {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn get_column(&self, index: u8) -> Result<Column, Exception> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn get_grid(&self, index: u8) -> Result<Grid, Exception> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `EMPTY` is never constructed
[INFO] [stdout]  --> src/game/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum CellValue {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 4 |     EMPTY,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pos_to_number` is never used
[INFO] [stdout]   --> src/game/cell.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn pos_to_number(pos: u16) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_value`, `is_empty`, and `is_readonly` are never used
[INFO] [stdout]   --> src/game/cell.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Cell {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn get_value(&self) -> CellValue {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn is_readonly(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ColumnOutOfBounds` and `GridOutOfBounds` are never constructed
[INFO] [stdout]  --> src/exceptions.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Exception {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     ColumnOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 |     GridOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "0281e6499a82010f6a0ae99eaf174f19fb622ba6f18f023f7f24e8dbc30e9435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0281e6499a82010f6a0ae99eaf174f19fb622ba6f18f023f7f24e8dbc30e9435", kill_on_drop: false }`
[INFO] [stdout] 0281e6499a82010f6a0ae99eaf174f19fb622ba6f18f023f7f24e8dbc30e9435
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 98e0275d0bd732db2b7862965ebee02085625d0835ac60ff1cc1d45cb533e5f1
[INFO] running `Command { std: "docker" "start" "-a" "98e0275d0bd732db2b7862965ebee02085625d0835ac60ff1cc1d45cb533e5f1", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `exception`
[INFO] [stderr]   --> src/main.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         Err(exception) => {
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exception`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `index` is never read
[INFO] [stderr]   --> src/game/board.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | pub struct Row {
[INFO] [stderr]    |            --- field in this struct
[INFO] [stderr] 10 |     index: u8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Column` is never constructed
[INFO] [stderr]   --> src/game/board.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct Column {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Grid` is never constructed
[INFO] [stderr]   --> src/game/board.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Grid {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `get_column` and `get_grid` are never used
[INFO] [stderr]   --> src/game/board.rs:56:12
[INFO] [stderr]    |
[INFO] [stderr] 24 | impl Board {
[INFO] [stderr]    | ---------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 56 |     pub fn get_column(&self, index: u8) -> Result<Column, Exception> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 69 |     pub fn get_grid(&self, index: u8) -> Result<Grid, Exception> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `EMPTY` is never constructed
[INFO] [stderr]  --> src/game/cell.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub enum CellValue {
[INFO] [stderr]   |          --------- variant in this enum
[INFO] [stderr] 4 |     EMPTY,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `pos_to_number` is never used
[INFO] [stderr]   --> src/game/cell.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn pos_to_number(pos: u16) -> u8 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `get_value`, `is_empty`, and `is_readonly` are never used
[INFO] [stderr]   --> src/game/cell.rs:71:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl Cell {
[INFO] [stderr]    | --------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 71 |     pub fn get_value(&self) -> CellValue {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 82 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 86 |     pub fn is_readonly(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `ColumnOutOfBounds` and `GridOutOfBounds` are never constructed
[INFO] [stderr]  --> src/exceptions.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum Exception {
[INFO] [stderr]   |          --------- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 5 |     ColumnOutOfBounds,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 6 |     GridOutOfBounds,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku-solver` (bin "sudoku-solver" test) generated 9 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sudoku_solver-a1169486c6a90848)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "98e0275d0bd732db2b7862965ebee02085625d0835ac60ff1cc1d45cb533e5f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98e0275d0bd732db2b7862965ebee02085625d0835ac60ff1cc1d45cb533e5f1", kill_on_drop: false }`
[INFO] [stdout] 98e0275d0bd732db2b7862965ebee02085625d0835ac60ff1cc1d45cb533e5f1
