[INFO] cloning repository https://github.com/FrequentlyMissedDeadlines/Smartest-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/FrequentlyMissedDeadlines/Smartest-Sudoku-Generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrequentlyMissedDeadlines%2FSmartest-Sudoku-Generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrequentlyMissedDeadlines%2FSmartest-Sudoku-Generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c609416d9c8cb01f530b1fc4b477eb2352ab241
[INFO] testing FrequentlyMissedDeadlines/Smartest-Sudoku-Generator against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrequentlyMissedDeadlines%2FSmartest-Sudoku-Generator" "/workspace/builds/worker-50/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-50/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FrequentlyMissedDeadlines/Smartest-Sudoku-Generator 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/FrequentlyMissedDeadlines/Smartest-Sudoku-Generator
[INFO] finished tweaking git repo https://github.com/FrequentlyMissedDeadlines/Smartest-Sudoku-Generator
[INFO] tweaked toml for git repo https://github.com/FrequentlyMissedDeadlines/Smartest-Sudoku-Generator written to /workspace/builds/worker-50/source/Cargo.toml
[INFO] crate git repo https://github.com/FrequentlyMissedDeadlines/Smartest-Sudoku-Generator 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] [stdout] 8ee46fe3aec192fa95be5b8a090abbeed1385d98b9d887aa5e684364468e59b0
[INFO] running `Command { std: "docker" "start" "-a" "8ee46fe3aec192fa95be5b8a090abbeed1385d98b9d887aa5e684364468e59b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ee46fe3aec192fa95be5b8a090abbeed1385d98b9d887aa5e684364468e59b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ee46fe3aec192fa95be5b8a090abbeed1385d98b9d887aa5e684364468e59b0", kill_on_drop: false }`
[INFO] [stdout] 8ee46fe3aec192fa95be5b8a090abbeed1385d98b9d887aa5e684364468e59b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] 8cb017a47f31a92d845aed348e760fc0dd2c1a76ae85c666ec22153c1d4b32fa
[INFO] running `Command { std: "docker" "start" "-a" "8cb017a47f31a92d845aed348e760fc0dd2c1a76ae85c666ec22153c1d4b32fa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling sudo-generator v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `copy`
[INFO] [stdout]   --> src/sudoku/sudoku.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn copy(&self) -> Sudoku {
[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: `parse`
[INFO] [stdout]   --> src/sudoku/sudoku.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn parse(string: String) -> Sudoku {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_solved`
[INFO] [stdout]   --> src/sudoku/sudoku.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `Command { std: "docker" "inspect" "8cb017a47f31a92d845aed348e760fc0dd2c1a76ae85c666ec22153c1d4b32fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cb017a47f31a92d845aed348e760fc0dd2c1a76ae85c666ec22153c1d4b32fa", kill_on_drop: false }`
[INFO] [stdout] 8cb017a47f31a92d845aed348e760fc0dd2c1a76ae85c666ec22153c1d4b32fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] [stdout] 815b1aac0534c434b4383e9f195fa9866e5d30186f9760e07a1c9c912f50024a
[INFO] running `Command { std: "docker" "start" "-a" "815b1aac0534c434b4383e9f195fa9866e5d30186f9760e07a1c9c912f50024a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudo-generator v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "815b1aac0534c434b4383e9f195fa9866e5d30186f9760e07a1c9c912f50024a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "815b1aac0534c434b4383e9f195fa9866e5d30186f9760e07a1c9c912f50024a", kill_on_drop: false }`
[INFO] [stdout] 815b1aac0534c434b4383e9f195fa9866e5d30186f9760e07a1c9c912f50024a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] [stdout] 5d770133273bf34e5b9b8f1b1e5471bdf6e371a4da06bf6825ee7b3350434208
[INFO] running `Command { std: "docker" "start" "-a" "5d770133273bf34e5b9b8f1b1e5471bdf6e371a4da06bf6825ee7b3350434208", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudo_generator-f146b35b177591b3)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test runner::runner::tests::test_to_string ... ok
[INFO] [stdout] test sudoku::sudoku::tests::test_struct_def ... ok
[INFO] [stdout] test sudoku::sudoku::tests::test_copy ... ok
[INFO] [stdout] test sudoku::sudoku::tests::test_to_string ... ok
[INFO] [stdout] test sudoku::sudoku::tests::test_parse ... ok
[INFO] [stdout] test tree::tree::tests::test_to_string ... ok
[INFO] [stdout] test tests::test_main ... ok
[INFO] [stdout] test sudoku::sudoku::tests::test_is_solved ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5d770133273bf34e5b9b8f1b1e5471bdf6e371a4da06bf6825ee7b3350434208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d770133273bf34e5b9b8f1b1e5471bdf6e371a4da06bf6825ee7b3350434208", kill_on_drop: false }`
[INFO] [stdout] 5d770133273bf34e5b9b8f1b1e5471bdf6e371a4da06bf6825ee7b3350434208