[INFO] updating cached repository takenta/sudoku_kenzan
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/takenta/sudoku_kenzan
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/takenta/sudoku_kenzan" "work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/sudoku_kenzan"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/sudoku_kenzan'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/takenta/sudoku_kenzan" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/takenta/sudoku_kenzan"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/takenta/sudoku_kenzan'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b276feaa3872d0f6801c9aadb5053b8781cd486b
[INFO] sha for GitHub repo takenta/sudoku_kenzan: b276feaa3872d0f6801c9aadb5053b8781cd486b
[INFO] validating manifest of takenta/sudoku_kenzan on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of takenta/sudoku_kenzan on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing takenta/sudoku_kenzan
[INFO] finished frobbing takenta/sudoku_kenzan
[INFO] frobbed toml for takenta/sudoku_kenzan written to work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/sudoku_kenzan/Cargo.toml
[INFO] started frobbing takenta/sudoku_kenzan
[INFO] finished frobbing takenta/sudoku_kenzan
[INFO] frobbed toml for takenta/sudoku_kenzan written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/takenta/sudoku_kenzan/Cargo.toml
[INFO] crate takenta/sudoku_kenzan already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing takenta/sudoku_kenzan against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/sudoku_kenzan:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a2cc6f6db9ec6982773e7e609758c8022d611fc978cff4181c1423cf3c613c72
[INFO] running `"docker" "start" "-a" "a2cc6f6db9ec6982773e7e609758c8022d611fc978cff4181c1423cf3c613c72"`
[INFO] [stderr]    Compiling sudoku_kenzan v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "a2cc6f6db9ec6982773e7e609758c8022d611fc978cff4181c1423cf3c613c72"`
[INFO] running `"docker" "rm" "-f" "a2cc6f6db9ec6982773e7e609758c8022d611fc978cff4181c1423cf3c613c72"`
[INFO] [stdout] a2cc6f6db9ec6982773e7e609758c8022d611fc978cff4181c1423cf3c613c72
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/takenta/sudoku_kenzan:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0b1e4bab2f9a62440f8acbb3770bd64a549652e55dac630aab7cdf26c53aa952
[INFO] running `"docker" "start" "-a" "0b1e4bab2f9a62440f8acbb3770bd64a549652e55dac630aab7cdf26c53aa952"`
[INFO] [stderr]    Compiling sudoku_kenzan v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `sudoku`
[INFO] [stderr]   --> src/main.rs:22:23
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let example = sudoku::Sudoku::new([1, 2, 3, 4, 5, 6, 7, 8, 9]);
[INFO] [stderr]    |                       ^^^^^^ use of undeclared type or module `sudoku`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `sudoku`
[INFO] [stderr]   --> src/main.rs:28:24
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let example  = sudoku::Sudoku::new([8, 1, 6, 3, 5, 7, 4, 9, 2]);
[INFO] [stderr]    |                        ^^^^^^ use of undeclared type or module `sudoku`
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Rng`, `thread_rng`
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::{thread_rng, Rng};
[INFO] [stderr]   |            ^^^^^^^^^^  ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `sudoku_kenzan`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0b1e4bab2f9a62440f8acbb3770bd64a549652e55dac630aab7cdf26c53aa952"`
[INFO] running `"docker" "rm" "-f" "0b1e4bab2f9a62440f8acbb3770bd64a549652e55dac630aab7cdf26c53aa952"`
[INFO] [stdout] 0b1e4bab2f9a62440f8acbb3770bd64a549652e55dac630aab7cdf26c53aa952