[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] testing nickx720/sudoku-solver against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickx720%2Fsudoku-solver" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nickx720/sudoku-solver 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/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-13/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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a1cabd79fe0ee18be4abea361f80c6d67c095567eeb9209fc20e010d7dc5bde1
[INFO] running `Command { std: "docker" "start" "-a" "a1cabd79fe0ee18be4abea361f80c6d67c095567eeb9209fc20e010d7dc5bde1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1cabd79fe0ee18be4abea361f80c6d67c095567eeb9209fc20e010d7dc5bde1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1cabd79fe0ee18be4abea361f80c6d67c095567eeb9209fc20e010d7dc5bde1", kill_on_drop: false }`
[INFO] [stdout] a1cabd79fe0ee18be4abea361f80c6d67c095567eeb9209fc20e010d7dc5bde1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] b7222159f0f7dd0066de62a73e2638160b856b440635d82456b569d33ae619d9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b7222159f0f7dd0066de62a73e2638160b856b440635d82456b569d33ae619d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.98s
[INFO] running `Command { std: "docker" "inspect" "b7222159f0f7dd0066de62a73e2638160b856b440635d82456b569d33ae619d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7222159f0f7dd0066de62a73e2638160b856b440635d82456b569d33ae619d9", kill_on_drop: false }`
[INFO] [stdout] b7222159f0f7dd0066de62a73e2638160b856b440635d82456b569d33ae619d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] f42df387e91af0ecfa53d0288402b1cc21883350869a551fd7195153fd5d072b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f42df387e91af0ecfa53d0288402b1cc21883350869a551fd7195153fd5d072b", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "f42df387e91af0ecfa53d0288402b1cc21883350869a551fd7195153fd5d072b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f42df387e91af0ecfa53d0288402b1cc21883350869a551fd7195153fd5d072b", kill_on_drop: false }`
[INFO] [stdout] f42df387e91af0ecfa53d0288402b1cc21883350869a551fd7195153fd5d072b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] b1227d775ea8cc77429ec106909107d644f424f85669eca8521bdda6bfa300fe
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b1227d775ea8cc77429ec106909107d644f424f85669eca8521bdda6bfa300fe", kill_on_drop: false }`
[INFO] [stderr] warning: value passed to `row` is never read
[INFO] [stderr]   --> src/main.rs:12:37
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value passed to `col` is never read
[INFO] [stderr]   --> src/main.rs:12:53
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn number_unassigned(&self, mut row: usize, mut col: usize) -> Vec<u32> {
[INFO] [stderr]    |                                                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku-989ba9ce9049208d)
[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" "b1227d775ea8cc77429ec106909107d644f424f85669eca8521bdda6bfa300fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1227d775ea8cc77429ec106909107d644f424f85669eca8521bdda6bfa300fe", kill_on_drop: false }`
[INFO] [stdout] b1227d775ea8cc77429ec106909107d644f424f85669eca8521bdda6bfa300fe