[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 master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErikPartridge%2Fsudoku-generator" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ErikPartridge/sudoku-generator on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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-5/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80d026efacfd10223793bc667a7d7aeb112a37630e7a6987288289970b8b9360
[INFO] running `Command { std: "docker" "start" "-a" "80d026efacfd10223793bc667a7d7aeb112a37630e7a6987288289970b8b9360", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80d026efacfd10223793bc667a7d7aeb112a37630e7a6987288289970b8b9360", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80d026efacfd10223793bc667a7d7aeb112a37630e7a6987288289970b8b9360", kill_on_drop: false }`
[INFO] [stdout] 80d026efacfd10223793bc667a7d7aeb112a37630e7a6987288289970b8b9360
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b86a9395ae66fbc855ef961a9e9b1d6890276c6de8b58d323dc43cfece63a70
[INFO] running `Command { std: "docker" "start" "-a" "3b86a9395ae66fbc855ef961a9e9b1d6890276c6de8b58d323dc43cfece63a70", 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] [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 2.98s
[INFO] running `Command { std: "docker" "inspect" "3b86a9395ae66fbc855ef961a9e9b1d6890276c6de8b58d323dc43cfece63a70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b86a9395ae66fbc855ef961a9e9b1d6890276c6de8b58d323dc43cfece63a70", kill_on_drop: false }`
[INFO] [stdout] 3b86a9395ae66fbc855ef961a9e9b1d6890276c6de8b58d323dc43cfece63a70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9746a197a4d769e4d935218bdbed37352b4fac889b0d2481bff658363e754ad8
[INFO] running `Command { std: "docker" "start" "-a" "9746a197a4d769e4d935218bdbed37352b4fac889b0d2481bff658363e754ad8", 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 2.37s
[INFO] running `Command { std: "docker" "inspect" "9746a197a4d769e4d935218bdbed37352b4fac889b0d2481bff658363e754ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9746a197a4d769e4d935218bdbed37352b4fac889b0d2481bff658363e754ad8", kill_on_drop: false }`
[INFO] [stdout] 9746a197a4d769e4d935218bdbed37352b4fac889b0d2481bff658363e754ad8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7eda61f653eb078af43c202ce2b61b3e1a58324d2b57e32537d50101a76a97f0
[INFO] running `Command { std: "docker" "start" "-a" "7eda61f653eb078af43c202ce2b61b3e1a58324d2b57e32537d50101a76a97f0", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `freedom::Freedom`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use freedom::Freedom;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[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: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_generator-4f1a0cc348e72618)
[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" "7eda61f653eb078af43c202ce2b61b3e1a58324d2b57e32537d50101a76a97f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7eda61f653eb078af43c202ce2b61b3e1a58324d2b57e32537d50101a76a97f0", kill_on_drop: false }`
[INFO] [stdout] 7eda61f653eb078af43c202ce2b61b3e1a58324d2b57e32537d50101a76a97f0