[INFO] cloning repository https://github.com/proudzhu/sudoku-norvig
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/proudzhu/sudoku-norvig" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproudzhu%2Fsudoku-norvig", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproudzhu%2Fsudoku-norvig'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b6e377f6e2dfe5e0fead0f5b572fb6577a55b79
[INFO] checking proudzhu/sudoku-norvig against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproudzhu%2Fsudoku-norvig" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/proudzhu/sudoku-norvig on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/proudzhu/sudoku-norvig
[INFO] finished tweaking git repo https://github.com/proudzhu/sudoku-norvig
[INFO] tweaked toml for git repo https://github.com/proudzhu/sudoku-norvig written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/proudzhu/sudoku-norvig already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54bde05f91e1f847fe870ce144ae6f4c3b67329ecce6d5eb219d8647bb66a391
[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" "54bde05f91e1f847fe870ce144ae6f4c3b67329ecce6d5eb219d8647bb66a391", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54bde05f91e1f847fe870ce144ae6f4c3b67329ecce6d5eb219d8647bb66a391", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54bde05f91e1f847fe870ce144ae6f4c3b67329ecce6d5eb219d8647bb66a391", kill_on_drop: false }`
[INFO] [stdout] 54bde05f91e1f847fe870ce144ae6f4c3b67329ecce6d5eb219d8647bb66a391
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f72d831b6b8ef6c0ad29bd683281c8bf4769831b4ed05fdf5eb519da02d0649
[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" "7f72d831b6b8ef6c0ad29bd683281c8bf4769831b4ed05fdf5eb519da02d0649", kill_on_drop: false }`
[INFO] [stderr]     Checking norvig v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Possible`
[INFO] [stdout]   --> src/main.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Possible {
[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: `is_on`
[INFO] [stdout]   --> src/main.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn is_on(&self, i: u8) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count`
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn count(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eliminate`
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn eliminate(&mut self, i: u8) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `val`
[INFO] [stdout]   --> src/main.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn val(&self) -> u8 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Sudoku`
[INFO] [stdout]   --> src/main.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Sudoku {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `assign`
[INFO] [stdout]   --> src/main.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eliminate`
[INFO] [stdout]   --> src/main.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Possible`
[INFO] [stdout]   --> src/main.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Possible {
[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: `is_on`
[INFO] [stdout]   --> src/main.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn is_on(&self, i: u8) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count`
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn count(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eliminate`
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn eliminate(&mut self, i: u8) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `val`
[INFO] [stdout]   --> src/main.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn val(&self) -> u8 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Sudoku`
[INFO] [stdout]   --> src/main.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Sudoku {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `assign`
[INFO] [stdout]   --> src/main.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eliminate`
[INFO] [stdout]   --> src/main.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "7f72d831b6b8ef6c0ad29bd683281c8bf4769831b4ed05fdf5eb519da02d0649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f72d831b6b8ef6c0ad29bd683281c8bf4769831b4ed05fdf5eb519da02d0649", kill_on_drop: false }`
[INFO] [stdout] 7f72d831b6b8ef6c0ad29bd683281c8bf4769831b4ed05fdf5eb519da02d0649