[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] checking Lait-au-Cafe/sudoku against try#d83b14207998f47b18a34e930157ac0d7c18b16e for pr-149137
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLait-au-Cafe%2Fsudoku" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Lait-au-Cafe/sudoku on toolchain d83b14207998f47b18a34e930157ac0d7c18b16e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Lait-au-Cafe/sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9b9fb384e778f341809d734d2d8f8efe4fe0b595712294f3bcf2a0ec674a9eb
[INFO] running `Command { std: "docker" "start" "-a" "d9b9fb384e778f341809d734d2d8f8efe4fe0b595712294f3bcf2a0ec674a9eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9b9fb384e778f341809d734d2d8f8efe4fe0b595712294f3bcf2a0ec674a9eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9b9fb384e778f341809d734d2d8f8efe4fe0b595712294f3bcf2a0ec674a9eb", kill_on_drop: false }`
[INFO] [stdout] d9b9fb384e778f341809d734d2d8f8efe4fe0b595712294f3bcf2a0ec674a9eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0dd6f2246f2be8fa40eaa62841b76fbf62a7c73482ac06be49828f6372656a8a
[INFO] running `Command { std: "docker" "start" "-a" "0dd6f2246f2be8fa40eaa62841b76fbf62a7c73482ac06be49828f6372656a8a", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `unwrap` is never used
[INFO] [stdout]   --> src/sudoku.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Cell {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn unwrap(&self) -> Option<usize> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `difference` is never used
[INFO] [stdout]   --> src/sudoku.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl Sudoku {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 93 |     pub fn difference(&self, other: &Self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unwrap` is never used
[INFO] [stdout]   --> src/sudoku.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Cell {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn unwrap(&self) -> Option<usize> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `difference` is never used
[INFO] [stdout]   --> src/sudoku.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl Sudoku {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 93 |     pub fn difference(&self, other: &Self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "0dd6f2246f2be8fa40eaa62841b76fbf62a7c73482ac06be49828f6372656a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dd6f2246f2be8fa40eaa62841b76fbf62a7c73482ac06be49828f6372656a8a", kill_on_drop: false }`
[INFO] [stdout] 0dd6f2246f2be8fa40eaa62841b76fbf62a7c73482ac06be49828f6372656a8a