[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] checking ErikPartridge/sudoku-generator against try#b946edaa85de45f124065f52b1bc55ba2fb4f9fb for pr-157562
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErikPartridge%2Fsudoku-generator" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[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-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ErikPartridge/sudoku-generator on toolchain b946edaa85de45f124065f52b1bc55ba2fb4f9fb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b946edaa85de45f124065f52b1bc55ba2fb4f9fb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ErikPartridge/sudoku-generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b946edaa85de45f124065f52b1bc55ba2fb4f9fb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `sudoku-generator` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7
[INFO] running `Command { std: "docker" "start" "70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7" "/opt/rustwide/cargo-home/bin/cargo" "+b946edaa85de45f124065f52b1bc55ba2fb4f9fb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7" "/opt/rustwide/cargo-home/bin/cargo" "+b946edaa85de45f124065f52b1bc55ba2fb4f9fb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `sudoku-generator` (manifest) generated 1 warning
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ORDER` is never used
[INFO] [stdout]  --> src/freedom.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const ORDER: u8 = 3;
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DIM` is never used
[INFO] [stdout]  --> src/freedom.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stdout]   |       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ELEMENTS` is never used
[INFO] [stdout]  --> src/freedom.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ALL_VALUES` is never used
[INFO] [stdout]  --> src/freedom.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Freedom` is never constructed
[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 `singleton` is never used
[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 `freedom_eliminate` is never used
[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 `create_freedom` is never used
[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 `sanity_check` is never used
[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 `search_least_free` is never used
[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 `Problem` is never constructed
[INFO] [stdout]  --> src/problem.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Problem {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ORDER` is never used
[INFO] [stdout]  --> src/freedom.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const ORDER: u8 = 3;
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DIM` is never used
[INFO] [stdout]  --> src/freedom.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | const DIM: u8 = ORDER * ORDER;
[INFO] [stdout]   |       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ELEMENTS` is never used
[INFO] [stdout]  --> src/freedom.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const ELEMENTS: u8 = DIM * DIM;
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ALL_VALUES` is never used
[INFO] [stdout]  --> src/freedom.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ALL_VALUES: u16 = (1 << DIM) - 1;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Freedom` is never constructed
[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 `singleton` is never used
[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 `freedom_eliminate` is never used
[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 `create_freedom` is never used
[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 `sanity_check` is never used
[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 `search_least_free` is never used
[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 `Problem` is never constructed
[INFO] [stdout]  --> src/problem.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Problem {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7", kill_on_drop: false }`
[INFO] [stdout] 70e4452c0abfb0b458ffe5dc92c18f53bd998fe6e42d438bdb2434d0409c9db7