[INFO] cloning repository https://github.com/Lait-au-Cafe/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lait-au-Cafe/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLait-au-Cafe%2Fsudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLait-au-Cafe%2Fsudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb0591c0e62f2b5323a6ccdf0920da06a2556a94
[INFO] testing Lait-au-Cafe/sudoku against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLait-au-Cafe%2Fsudoku" "/workspace/builds/worker-52/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-52/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Lait-au-Cafe/sudoku on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Lait-au-Cafe/sudoku
[INFO] finished tweaking git repo https://github.com/Lait-au-Cafe/sudoku
[INFO] tweaked toml for git repo https://github.com/Lait-au-Cafe/sudoku written to /workspace/builds/worker-52/source/Cargo.toml
[INFO] crate git repo https://github.com/Lait-au-Cafe/sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17b0d53bd5b5ae90eae14b56726ce1535ac7fc1daaa92ec2c0710bab8c7de710
[INFO] running `Command { std: "docker" "start" "-a" "17b0d53bd5b5ae90eae14b56726ce1535ac7fc1daaa92ec2c0710bab8c7de710", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17b0d53bd5b5ae90eae14b56726ce1535ac7fc1daaa92ec2c0710bab8c7de710", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17b0d53bd5b5ae90eae14b56726ce1535ac7fc1daaa92ec2c0710bab8c7de710", kill_on_drop: false }`
[INFO] [stdout] 17b0d53bd5b5ae90eae14b56726ce1535ac7fc1daaa92ec2c0710bab8c7de710
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 950026eb36d971715098f88f75eaf128596d5368e838ade1630ba8e31d18064b
[INFO] running `Command { std: "docker" "start" "-a" "950026eb36d971715098f88f75eaf128596d5368e838ade1630ba8e31d18064b", kill_on_drop: false }`
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `unwrap`
[INFO] [stdout]   --> src/sudoku.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn unwrap(&self) -> Option<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: `difference`
[INFO] [stdout]   --> src/sudoku.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn difference(&self, other: &Self) -> Self {
[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 43.70s
[INFO] running `Command { std: "docker" "inspect" "950026eb36d971715098f88f75eaf128596d5368e838ade1630ba8e31d18064b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "950026eb36d971715098f88f75eaf128596d5368e838ade1630ba8e31d18064b", kill_on_drop: false }`
[INFO] [stdout] 950026eb36d971715098f88f75eaf128596d5368e838ade1630ba8e31d18064b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 369bf7e0ea4b6c3d2f53ea104b4c32737e00154052081b224e2a10e5bfd6cebd
[INFO] running `Command { std: "docker" "start" "-a" "369bf7e0ea4b6c3d2f53ea104b4c32737e00154052081b224e2a10e5bfd6cebd", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `unwrap`
[INFO] [stdout]   --> src/sudoku.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn unwrap(&self) -> Option<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: `difference`
[INFO] [stdout]   --> src/sudoku.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn difference(&self, other: &Self) -> Self {
[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 0.80s
[INFO] running `Command { std: "docker" "inspect" "369bf7e0ea4b6c3d2f53ea104b4c32737e00154052081b224e2a10e5bfd6cebd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "369bf7e0ea4b6c3d2f53ea104b4c32737e00154052081b224e2a10e5bfd6cebd", kill_on_drop: false }`
[INFO] [stdout] 369bf7e0ea4b6c3d2f53ea104b4c32737e00154052081b224e2a10e5bfd6cebd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6ae68ef73d6c3701cd9c0167c32d08c540c119e7e018122accd6298a2dcf29e6
[INFO] running `Command { std: "docker" "start" "-a" "6ae68ef73d6c3701cd9c0167c32d08c540c119e7e018122accd6298a2dcf29e6", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `unwrap`
[INFO] [stderr]   --> src/sudoku.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn unwrap(&self) -> Option<usize> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `difference`
[INFO] [stderr]   --> src/sudoku.rs:93:12
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn difference(&self, other: &Self) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.28s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku-a742423e283cf519)
[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" "6ae68ef73d6c3701cd9c0167c32d08c540c119e7e018122accd6298a2dcf29e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ae68ef73d6c3701cd9c0167c32d08c540c119e7e018122accd6298a2dcf29e6", kill_on_drop: false }`
[INFO] [stdout] 6ae68ef73d6c3701cd9c0167c32d08c540c119e7e018122accd6298a2dcf29e6