[INFO] cloning repository https://github.com/nickx720/sudoku-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nickx720/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bdeab72f78dc1e7c5f28b1ee6fcf5c51572a02c0
[INFO] checking nickx720/sudoku-solver against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-solver" "/workspace/builds/worker-34/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-34/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nickx720/sudoku-solver on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nickx720/sudoku-solver
[INFO] finished tweaking git repo https://github.com/nickx720/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/nickx720/sudoku-solver written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] crate git repo https://github.com/nickx720/sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0955fb108038943c4e27d41512e517435b2afbde438dab0d03b3b28abcfe12a9
[INFO] running `Command { std: "docker" "start" "-a" "0955fb108038943c4e27d41512e517435b2afbde438dab0d03b3b28abcfe12a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0955fb108038943c4e27d41512e517435b2afbde438dab0d03b3b28abcfe12a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0955fb108038943c4e27d41512e517435b2afbde438dab0d03b3b28abcfe12a9", kill_on_drop: false }`
[INFO] [stdout] 0955fb108038943c4e27d41512e517435b2afbde438dab0d03b3b28abcfe12a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd5e19ee8494f76565582ff79a949742f4d64bbb0753382b3b0128ab91dd48ee
[INFO] running `Command { std: "docker" "start" "-a" "cd5e19ee8494f76565582ff79a949742f4d64bbb0753382b3b0128ab91dd48ee", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value passed to `row` is never read
[INFO] [stdout]   --> src/main.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value passed to `col` is never read
[INFO] [stdout]   --> src/main.rs:12:53
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value passed to `row` is never read
[INFO] [stdout]   --> src/main.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value passed to `col` is never read
[INFO] [stdout]   --> src/main.rs:12:53
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stdout]    |                                                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.73s
[INFO] running `Command { std: "docker" "inspect" "cd5e19ee8494f76565582ff79a949742f4d64bbb0753382b3b0128ab91dd48ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd5e19ee8494f76565582ff79a949742f4d64bbb0753382b3b0128ab91dd48ee", kill_on_drop: false }`
[INFO] [stdout] cd5e19ee8494f76565582ff79a949742f4d64bbb0753382b3b0128ab91dd48ee