[INFO] cloning repository https://github.com/ErikPartridge/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/ErikPartridge/sudoku-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErikPartridge%2Fsudoku-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErikPartridge%2Fsudoku-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] abf3fb1b85c4b234c8d333af646357ec631d53d2
[INFO] testing ErikPartridge/sudoku-generator against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErikPartridge%2Fsudoku-generator" "/workspace/builds/worker-71/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-71/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ErikPartridge/sudoku-generator on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ErikPartridge/sudoku-generator
[INFO] finished tweaking git repo https://github.com/ErikPartridge/sudoku-generator
[INFO] tweaked toml for git repo https://github.com/ErikPartridge/sudoku-generator written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] crate git repo https://github.com/ErikPartridge/sudoku-generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ba194477a50a31e867dc7c81b64d6ca3107dc4f39683c63cb044c6b0ff092c8
[INFO] running `Command { std: "docker" "start" "-a" "3ba194477a50a31e867dc7c81b64d6ca3107dc4f39683c63cb044c6b0ff092c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ba194477a50a31e867dc7c81b64d6ca3107dc4f39683c63cb044c6b0ff092c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ba194477a50a31e867dc7c81b64d6ca3107dc4f39683c63cb044c6b0ff092c8", kill_on_drop: false }`
[INFO] [stdout] 3ba194477a50a31e867dc7c81b64d6ca3107dc4f39683c63cb044c6b0ff092c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2fabdba0fabd84874395d45dd2898b119e5033dd08c3ddf30eafab09a86ac918
[INFO] running `Command { std: "docker" "start" "-a" "2fabdba0fabd84874395d45dd2898b119e5033dd08c3ddf30eafab09a86ac918", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling sudoku-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `freedom::Freedom`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use freedom::Freedom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `problem::Problem`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use problem::Problem;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/freedom.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     for j in 0..3 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ORDER`
[INFO] [stdout]  --> src/freedom.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | const ORDER: u8 = 3;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DIM`
[INFO] [stdout]  --> src/freedom.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ELEMENTS`
[INFO] [stdout]  --> src/freedom.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ALL_VALUES`
[INFO] [stdout]  --> src/freedom.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Freedom`
[INFO] [stdout]  --> src/freedom.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Freedom {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `singleton`
[INFO] [stdout]   --> src/freedom.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn singleton(v: u16) -> u16 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `freedom_eliminate`
[INFO] [stdout]   --> src/freedom.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn freedom_eliminate(f: &Freedom, col: u16, row: u16, value: u16) -> Freedom {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_freedom`
[INFO] [stdout]   --> src/freedom.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn create_freedom(problem: &Problem) -> Freedom {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sanity_check`
[INFO] [stdout]   --> src/freedom.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn sanity_check(problem: &Problem, freedom: &Freedom) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `search_least_free`
[INFO] [stdout]   --> src/freedom.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn search_least_free(problem: &Problem, freedom: &Freedom) -> u16 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Problem`
[INFO] [stdout]  --> src/problem.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Problem {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.13s
[INFO] running `Command { std: "docker" "inspect" "2fabdba0fabd84874395d45dd2898b119e5033dd08c3ddf30eafab09a86ac918", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fabdba0fabd84874395d45dd2898b119e5033dd08c3ddf30eafab09a86ac918", kill_on_drop: false }`
[INFO] [stdout] 2fabdba0fabd84874395d45dd2898b119e5033dd08c3ddf30eafab09a86ac918
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3fbba9a574d6f5d3865f76d8bcbdc5f58024c62f2e0c251db01cf67f33f01e5f
[INFO] running `Command { std: "docker" "start" "-a" "3fbba9a574d6f5d3865f76d8bcbdc5f58024c62f2e0c251db01cf67f33f01e5f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudoku-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `freedom::Freedom`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use freedom::Freedom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `problem::Problem`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use problem::Problem;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/freedom.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     for j in 0..3 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ORDER`
[INFO] [stdout]  --> src/freedom.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | const ORDER: u8 = 3;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DIM`
[INFO] [stdout]  --> src/freedom.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ELEMENTS`
[INFO] [stdout]  --> src/freedom.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ALL_VALUES`
[INFO] [stdout]  --> src/freedom.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Freedom`
[INFO] [stdout]  --> src/freedom.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Freedom {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `singleton`
[INFO] [stdout]   --> src/freedom.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn singleton(v: u16) -> u16 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `freedom_eliminate`
[INFO] [stdout]   --> src/freedom.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn freedom_eliminate(f: &Freedom, col: u16, row: u16, value: u16) -> Freedom {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_freedom`
[INFO] [stdout]   --> src/freedom.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn create_freedom(problem: &Problem) -> Freedom {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sanity_check`
[INFO] [stdout]   --> src/freedom.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn sanity_check(problem: &Problem, freedom: &Freedom) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `search_least_free`
[INFO] [stdout]   --> src/freedom.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn search_least_free(problem: &Problem, freedom: &Freedom) -> u16 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Problem`
[INFO] [stdout]  --> src/problem.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Problem {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "3fbba9a574d6f5d3865f76d8bcbdc5f58024c62f2e0c251db01cf67f33f01e5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fbba9a574d6f5d3865f76d8bcbdc5f58024c62f2e0c251db01cf67f33f01e5f", kill_on_drop: false }`
[INFO] [stdout] 3fbba9a574d6f5d3865f76d8bcbdc5f58024c62f2e0c251db01cf67f33f01e5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d2edc5f0deb55ec82b74fb57ec279202600531cb65586ec4887d641e5844b4b5
[INFO] running `Command { std: "docker" "start" "-a" "d2edc5f0deb55ec82b74fb57ec279202600531cb65586ec4887d641e5844b4b5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `freedom::Freedom`
[INFO] [stdout] 
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 3 | use freedom::Freedom;
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `problem::Problem`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use problem::Problem;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/freedom.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     for j in 0..3 {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ORDER`
[INFO] [stderr]  --> src/freedom.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const ORDER: u8 = 3;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `DIM`
[INFO] [stderr]  --> src/freedom.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ELEMENTS`
[INFO] [stderr]  --> src/freedom.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ALL_VALUES`
[INFO] [stderr]  --> src/freedom.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Freedom`
[INFO] [stderr]  --> src/freedom.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Freedom {
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `singleton`
[INFO] [stderr]   --> src/freedom.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn singleton(v: u16) -> u16 {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `freedom_eliminate`
[INFO] [stderr]   --> src/freedom.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn freedom_eliminate(f: &Freedom, col: u16, row: u16, value: u16) -> Freedom {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_freedom`
[INFO] [stderr]   --> src/freedom.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn create_freedom(problem: &Problem) -> Freedom {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sanity_check`
[INFO] [stderr]   --> src/freedom.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn sanity_check(problem: &Problem, freedom: &Freedom) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `search_least_free`
[INFO] [stderr]   --> src/freedom.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn search_least_free(problem: &Problem, freedom: &Freedom) -> u16 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Problem`
[INFO] [stderr]  --> src/problem.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Problem {
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku-generator` (bin "sudoku-generator" test) generated 14 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_generator-eaa8eaa67eff1dfc)
[INFO] running `Command { std: "docker" "inspect" "d2edc5f0deb55ec82b74fb57ec279202600531cb65586ec4887d641e5844b4b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2edc5f0deb55ec82b74fb57ec279202600531cb65586ec4887d641e5844b4b5", kill_on_drop: false }`
[INFO] [stdout] d2edc5f0deb55ec82b74fb57ec279202600531cb65586ec4887d641e5844b4b5