[INFO] updating cached repository https://github.com/mkurth/rustysodoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29feba7bfa8914629753c1752bc4b8beb97fd78b
[INFO] checking mkurth/rustysodoku against try#5fdfba63a96c5e8ae0ebf6b8b66853110277087d for pr-73166
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmkurth%2Frustysodoku" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mkurth/rustysodoku on toolchain 5fdfba63a96c5e8ae0ebf6b8b66853110277087d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mkurth/rustysodoku
[INFO] finished tweaking git repo https://github.com/mkurth/rustysodoku
[INFO] tweaked toml for git repo https://github.com/mkurth/rustysodoku written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/mkurth/rustysodoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c364e484758c4847ce78588d8c35d0cc3093a26e16ed28e479f587a1d0b05f3
[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" "3c364e484758c4847ce78588d8c35d0cc3093a26e16ed28e479f587a1d0b05f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c364e484758c4847ce78588d8c35d0cc3093a26e16ed28e479f587a1d0b05f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c364e484758c4847ce78588d8c35d0cc3093a26e16ed28e479f587a1d0b05f3", kill_on_drop: false }`
[INFO] [stdout] 3c364e484758c4847ce78588d8c35d0cc3093a26e16ed28e479f587a1d0b05f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ad45e7b7a77a137a7aa4eeec0669f9a74d2d7ed52102912d53b63cdb17c8928
[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" "0ad45e7b7a77a137a7aa4eeec0669f9a74d2d7ed52102912d53b63cdb17c8928", kill_on_drop: false }`
[INFO] [stderr]     Checking rustysodoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/solver.rs:10:27
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn zip_with_all_solutions(cells: Vec<Vec<Cell>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/solver.rs:14:32
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn reduce_impossible_solutions(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/solver.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn reduce_possible_solution(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `zip_with_all_solutions`
[INFO] [stdout]   --> src/solver.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn zip_with_all_solutions(cells: Vec<Vec<Cell>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reduce_impossible_solutions`
[INFO] [stdout]   --> src/solver.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn reduce_impossible_solutions(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reduce_possible_solution`
[INFO] [stdout]   --> src/solver.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn reduce_possible_solution(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/solver.rs:10:27
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn zip_with_all_solutions(cells: Vec<Vec<Cell>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/solver.rs:14:32
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn reduce_impossible_solutions(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cells`
[INFO] [stdout]   --> src/solver.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn reduce_possible_solution(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_cells`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `zip_with_all_solutions`
[INFO] [stdout]   --> src/solver.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn zip_with_all_solutions(cells: Vec<Vec<Cell>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reduce_impossible_solutions`
[INFO] [stdout]   --> src/solver.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn reduce_impossible_solutions(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reduce_possible_solution`
[INFO] [stdout]   --> src/solver.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn reduce_possible_solution(cells: Vec<Vec<(Cell, Vec<usize>)>>) -> Vec<Vec<(Cell, Vec<usize>)>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "0ad45e7b7a77a137a7aa4eeec0669f9a74d2d7ed52102912d53b63cdb17c8928", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ad45e7b7a77a137a7aa4eeec0669f9a74d2d7ed52102912d53b63cdb17c8928", kill_on_drop: false }`
[INFO] [stdout] 0ad45e7b7a77a137a7aa4eeec0669f9a74d2d7ed52102912d53b63cdb17c8928