[INFO] cloning repository https://github.com/perryqh/sudoku-solver-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/perryqh/sudoku-solver-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperryqh%2Fsudoku-solver-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperryqh%2Fsudoku-solver-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 836453dcff39c26dae658817272f2357f855d9bb
[INFO] testing perryqh/sudoku-solver-rust against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperryqh%2Fsudoku-solver-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/perryqh/sudoku-solver-rust on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/perryqh/sudoku-solver-rust
[INFO] finished tweaking git repo https://github.com/perryqh/sudoku-solver-rust
[INFO] tweaked toml for git repo https://github.com/perryqh/sudoku-solver-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/perryqh/sudoku-solver-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1e11d3b5d9664518cf4333901787634a542aba872ae0e6cc545ba06fcc5af279
[INFO] running `Command { std: "docker" "start" "-a" "1e11d3b5d9664518cf4333901787634a542aba872ae0e6cc545ba06fcc5af279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e11d3b5d9664518cf4333901787634a542aba872ae0e6cc545ba06fcc5af279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e11d3b5d9664518cf4333901787634a542aba872ae0e6cc545ba06fcc5af279", kill_on_drop: false }`
[INFO] [stdout] 1e11d3b5d9664518cf4333901787634a542aba872ae0e6cc545ba06fcc5af279
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4dff54fb0674107a7c0d17170f8fbda28cabc919ce41c77c25e99806b922d2d9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4dff54fb0674107a7c0d17170f8fbda28cabc919ce41c77c25e99806b922d2d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `test_board`
[INFO] [stdout]   --> src/solver.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn test_board() -> [[i8; 9]; 9] {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `almost_solved_test_board`
[INFO] [stdout]   --> src/solver.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn almost_solved_test_board() -> [[i8; 9]; 9] {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "4dff54fb0674107a7c0d17170f8fbda28cabc919ce41c77c25e99806b922d2d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dff54fb0674107a7c0d17170f8fbda28cabc919ce41c77c25e99806b922d2d9", kill_on_drop: false }`
[INFO] [stdout] 4dff54fb0674107a7c0d17170f8fbda28cabc919ce41c77c25e99806b922d2d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9e3c333de8aff5fb0a2c505eba02fe5b265854aef60d06d0c7fd8ea5785d5466
[INFO] running `Command { std: "docker" "start" "-a" "9e3c333de8aff5fb0a2c505eba02fe5b265854aef60d06d0c7fd8ea5785d5466", kill_on_drop: false }`
[INFO] [stdout] warning: function is never used: `test_board`
[INFO] [stdout]   --> src/solver.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn test_board() -> [[i8; 9]; 9] {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `almost_solved_test_board`
[INFO] [stdout]   --> src/solver.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn almost_solved_test_board() -> [[i8; 9]; 9] {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "9e3c333de8aff5fb0a2c505eba02fe5b265854aef60d06d0c7fd8ea5785d5466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e3c333de8aff5fb0a2c505eba02fe5b265854aef60d06d0c7fd8ea5785d5466", kill_on_drop: false }`
[INFO] [stdout] 9e3c333de8aff5fb0a2c505eba02fe5b265854aef60d06d0c7fd8ea5785d5466
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 89c8d7aae3d44b43389fa0c61a05c0cc79df4330d37a0a067adb8fcb9b99a300
[INFO] running `Command { std: "docker" "start" "-a" "89c8d7aae3d44b43389fa0c61a05c0cc79df4330d37a0a067adb8fcb9b99a300", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: function is never used: `test_board`
[INFO] [stdout] running 11 tests
[INFO] [stderr]   --> src/solver.rs:79:4
[INFO] [stdout] test solver::returns_invalid_for_8_6_1 ... ok
[INFO] [stderr]    |
[INFO] [stdout] test solver::returns_invalid_for_another_dupe_in_column_and_three_by_three ... ok
[INFO] [stderr] 79 | fn test_board() -> [[i8; 9]; 9] {
[INFO] [stdout] test solver::returns_invalid_for_dupe_in_column ... ok
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stdout] test solver::returns_invalid_for_dupe_in_column_and_three_by_three ... ok
[INFO] [stderr]    |
[INFO] [stdout] test solver::returns_invalid_for_dupe_in_row ... ok
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] test solver::returns_invalid_for_dupe_in_three_by_three ... ok
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `almost_solved_test_board`
[INFO] [stderr]   --> src/solver.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn almost_solved_test_board() -> [[i8; 9]; 9] {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku-solver` (lib) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_solver-76d5c012cc0c9641)
[INFO] [stdout] test solver::returns_invalid_for_dupe_in_column_and_last_three_by_three ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_solver-0e07928920ae95e9)
[INFO] [stdout] test solver::returns_invalid_for_dupe_in_column_and_row ... ok
[INFO] [stdout] test solver::returns_solved_board ... ok
[INFO] [stdout] test solver::returns_board_easy ... ok
[INFO] [stdout] test solver::returns_valid_for_0_3_2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[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] [stderr]    Doc-tests sudoku-solver
[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" "89c8d7aae3d44b43389fa0c61a05c0cc79df4330d37a0a067adb8fcb9b99a300", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89c8d7aae3d44b43389fa0c61a05c0cc79df4330d37a0a067adb8fcb9b99a300", kill_on_drop: false }`
[INFO] [stdout] 89c8d7aae3d44b43389fa0c61a05c0cc79df4330d37a0a067adb8fcb9b99a300