[INFO] cloning repository https://github.com/philmcminn/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/philmcminn/rust-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilmcminn%2Frust-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilmcminn%2Frust-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8baaaa55d6011f19725e7784062ca888901f184
[INFO] testing philmcminn/rust-sudoku against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilmcminn%2Frust-sudoku" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/philmcminn/rust-sudoku on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/philmcminn/rust-sudoku
[INFO] finished tweaking git repo https://github.com/philmcminn/rust-sudoku
[INFO] tweaked toml for git repo https://github.com/philmcminn/rust-sudoku written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/philmcminn/rust-sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b096f719883923d06f6ec84cde82f75b4022e160ca1a3c6480da3d73cabe6bfc
[INFO] running `Command { std: "docker" "start" "-a" "b096f719883923d06f6ec84cde82f75b4022e160ca1a3c6480da3d73cabe6bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b096f719883923d06f6ec84cde82f75b4022e160ca1a3c6480da3d73cabe6bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b096f719883923d06f6ec84cde82f75b4022e160ca1a3c6480da3d73cabe6bfc", kill_on_drop: false }`
[INFO] [stdout] b096f719883923d06f6ec84cde82f75b4022e160ca1a3c6480da3d73cabe6bfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 710c70a1e8e7697188f2e8d7769e5f7e3bd0b13d38a3a760549e7a7e4c701ee2
[INFO] running `Command { std: "docker" "start" "-a" "710c70a1e8e7697188f2e8d7769e5f7e3bd0b13d38a3a760549e7a7e4c701ee2", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::DLX`
[INFO] [stdout]    --> src/dlx.rs:318:9
[INFO] [stdout]     |
[INFO] [stdout] 318 |     use super::DLX;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Sudoku`
[INFO] [stdout]    --> src/solver.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |     use super::Sudoku;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::DLX`
[INFO] [stdout]    --> src/solver.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     use super::DLX;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::super::solver`
[INFO] [stdout]    --> src/solver.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     use super::super::solver; // TODO: is there a better way to state this
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Sudoku`
[INFO] [stdout]    --> src/sudoku.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |     use super::Sudoku;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `num_cols`
[INFO] [stdout]   --> src/matrix.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn num_cols(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `block_dimension`
[INFO] [stdout]   --> src/sudoku.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn block_dimension(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_completed`
[INFO] [stdout]    --> src/sudoku.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub fn is_completed(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `Command { std: "docker" "inspect" "710c70a1e8e7697188f2e8d7769e5f7e3bd0b13d38a3a760549e7a7e4c701ee2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "710c70a1e8e7697188f2e8d7769e5f7e3bd0b13d38a3a760549e7a7e4c701ee2", kill_on_drop: false }`
[INFO] [stdout] 710c70a1e8e7697188f2e8d7769e5f7e3bd0b13d38a3a760549e7a7e4c701ee2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e5a1b95cd2e7681b5e3ccd8f09a4a16e636254a475445fe545f92da27aa98e2
[INFO] running `Command { std: "docker" "start" "-a" "9e5a1b95cd2e7681b5e3ccd8f09a4a16e636254a475445fe545f92da27aa98e2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::DLX`
[INFO] [stdout]    --> src/solver.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     use super::DLX;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `num_cols`
[INFO] [stdout]   --> src/matrix.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn num_cols(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `block_dimension`
[INFO] [stdout]   --> src/sudoku.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn block_dimension(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_completed`
[INFO] [stdout]    --> src/sudoku.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub fn is_completed(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.37s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/sudoku-b3b74df0d05e22f7)
[INFO] running `Command { std: "docker" "inspect" "9e5a1b95cd2e7681b5e3ccd8f09a4a16e636254a475445fe545f92da27aa98e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e5a1b95cd2e7681b5e3ccd8f09a4a16e636254a475445fe545f92da27aa98e2", kill_on_drop: false }`
[INFO] [stdout] 9e5a1b95cd2e7681b5e3ccd8f09a4a16e636254a475445fe545f92da27aa98e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ec2aaf862022810dbe71840b411e091eadf494d2f8637681ebfcc1fe769b83ba
[INFO] running `Command { std: "docker" "start" "-a" "ec2aaf862022810dbe71840b411e091eadf494d2f8637681ebfcc1fe769b83ba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `super::DLX`
[INFO] [stdout] 
[INFO] [stderr]    --> src/solver.rs:101:9
[INFO] [stdout] running 17 tests
[INFO] [stderr]     |
[INFO] [stderr] 101 |     use super::DLX;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `num_cols`
[INFO] [stderr]   --> src/matrix.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn num_cols(&self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `block_dimension`
[INFO] [stderr]   --> src/sudoku.rs:99:12
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn block_dimension(&self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_completed`
[INFO] [stderr]    --> src/sudoku.rs:146:12
[INFO] [stderr]     |
[INFO] [stderr] 146 |     pub fn is_completed(&self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.50s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sudoku-b3b74df0d05e22f7)
[INFO] [stdout] test dlx::tests::test_matrix_element_vertex_id ... ok
[INFO] [stdout] test dlx::tests::test_matrix_col_indices ... ok
[INFO] [stdout] test dlx::tests::test_matrix_cover_elements ... ok
[INFO] [stdout] test dlx::tests::test_matrix_col_vertex_id ... ok
[INFO] [stdout] test dlx::tests::test_matrix_indices_one_element ... ok
[INFO] [stdout] test dlx::tests::test_matrix_row_vertex_id ... ok
[INFO] [stdout] test dlx::tests::test_matrix_row_indices ... ok
[INFO] [stdout] test dlx::tests::test_matrix_uncover_elements ... ok
[INFO] [stdout] test solver::tests::test_matrix_row_for_cell_value ... ok
[INFO] [stdout] test dlx::tests::test_matrix_set_element ... ok
[INFO] [stdout] test sudoku::tests::test_is_consistent_column ... ok
[INFO] [stdout] test sudoku::tests::test_is_consistent_block ... ok
[INFO] [stdout] test dlx::tests::test_matrix_new ... ok
[INFO] [stdout] test solver::tests::test_cell_value_for_matrix_row ... ok
[INFO] [stdout] test sudoku::tests::test_is_consistent_row ... ok
[INFO] [stdout] test dlx::tests::test_matrix_element_vertex_id_panic_row - should panic ... ok
[INFO] [stdout] test dlx::tests::test_matrix_element_vertex_id_panic_col - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ec2aaf862022810dbe71840b411e091eadf494d2f8637681ebfcc1fe769b83ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec2aaf862022810dbe71840b411e091eadf494d2f8637681ebfcc1fe769b83ba", kill_on_drop: false }`
[INFO] [stdout] ec2aaf862022810dbe71840b411e091eadf494d2f8637681ebfcc1fe769b83ba