[INFO] cloning repository https://github.com/nickx720/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/nickx720/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bdeab72f78dc1e7c5f28b1ee6fcf5c51572a02c0
[INFO] testing nickx720/sudoku-solver against beta-2025-10-28 for beta-1.92-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-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] started tweaking git repo https://github.com/nickx720/sudoku-solver
[INFO] finished tweaking git repo https://github.com/nickx720/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/nickx720/sudoku-solver written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nickx720/sudoku-solver on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nickx720/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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1690d77671939c96fb696376bf7c9619aab675bf39e646ac2d7c94f7fe2d8261
[INFO] running `Command { std: "docker" "start" "-a" "1690d77671939c96fb696376bf7c9619aab675bf39e646ac2d7c94f7fe2d8261", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1690d77671939c96fb696376bf7c9619aab675bf39e646ac2d7c94f7fe2d8261", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1690d77671939c96fb696376bf7c9619aab675bf39e646ac2d7c94f7fe2d8261", kill_on_drop: false }`
[INFO] [stdout] 1690d77671939c96fb696376bf7c9619aab675bf39e646ac2d7c94f7fe2d8261
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4424f1ea2c63d54967e2d159dea9f1082f49a284455e156ef0d7fc8d524fc0af
[INFO] running `Command { std: "docker" "start" "-a" "4424f1ea2c63d54967e2d159dea9f1082f49a284455e156ef0d7fc8d524fc0af", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value passed to `row` is never read
[INFO] [stdout]   --> src/main.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value passed to `col` is never read
[INFO] [stdout]   --> src/main.rs:12:49
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "4424f1ea2c63d54967e2d159dea9f1082f49a284455e156ef0d7fc8d524fc0af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4424f1ea2c63d54967e2d159dea9f1082f49a284455e156ef0d7fc8d524fc0af", kill_on_drop: false }`
[INFO] [stdout] 4424f1ea2c63d54967e2d159dea9f1082f49a284455e156ef0d7fc8d524fc0af
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3354d642ad028d88364d5f496b3d46860a49a5c84755e101e5250132833b4474
[INFO] running `Command { std: "docker" "start" "-a" "3354d642ad028d88364d5f496b3d46860a49a5c84755e101e5250132833b4474", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value passed to `row` is never read
[INFO] [stdout]   --> src/main.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value passed to `col` is never read
[INFO] [stdout]   --> src/main.rs:12:49
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "3354d642ad028d88364d5f496b3d46860a49a5c84755e101e5250132833b4474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3354d642ad028d88364d5f496b3d46860a49a5c84755e101e5250132833b4474", kill_on_drop: false }`
[INFO] [stdout] 3354d642ad028d88364d5f496b3d46860a49a5c84755e101e5250132833b4474
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1d1f7bfaeb9657ddbd246cddc28e436e654b184ef38210d94db72362dd6d19e5
[INFO] running `Command { std: "docker" "start" "-a" "1d1f7bfaeb9657ddbd246cddc28e436e654b184ef38210d94db72362dd6d19e5", kill_on_drop: false }`
[INFO] [stderr] warning: value passed to `row` is never read
[INFO] [stderr]   --> src/main.rs:12:33
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stderr]    |                                 ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value passed to `col` is never read
[INFO] [stderr]   --> src/main.rs:12:49
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stderr]    |                                                 ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sudoku-fe0828f963245d68)
[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" "1d1f7bfaeb9657ddbd246cddc28e436e654b184ef38210d94db72362dd6d19e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d1f7bfaeb9657ddbd246cddc28e436e654b184ef38210d94db72362dd6d19e5", kill_on_drop: false }`
[INFO] [stdout] 1d1f7bfaeb9657ddbd246cddc28e436e654b184ef38210d94db72362dd6d19e5