Dec 04 12:11:31.802 INFO checking proudzhu/sudoku-norvig against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 12:11:31.802 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 12:11:32.276 INFO [stdout] 7e37add9ea6e52348bc695f064d318d00a696b6e4b6e5630c274f36f12c11f45
Dec 04 12:11:32.279 INFO running `"docker" "start" "-a" "7e37add9ea6e52348bc695f064d318d00a696b6e4b6e5630c274f36f12c11f45"`
Dec 04 12:11:34.545 INFO [stderr] usermod: no changes
Dec 04 12:11:34.595 INFO [stderr]     Checking norvig v0.1.0 (/source)
Dec 04 12:11:35.359 INFO [stderr] warning: struct is never constructed: `Possible`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:10:1
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 10 | struct Possible {
Dec 04 12:11:35.359 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: method is never used: `is_on`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:15:5
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 15 |     fn is_on(&self, i: u8) -> bool {
Dec 04 12:11:35.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: method is never used: `count`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:19:5
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 19 |     fn count(&self) -> u8 {
Dec 04 12:11:35.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: method is never used: `eliminate`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:25:5
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 25 |     fn eliminate(&mut self, i: u8) {
Dec 04 12:11:35.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: method is never used: `val`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:29:5
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 29 |     fn val(&self) -> u8 {
Dec 04 12:11:35.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: struct is never constructed: `Sudoku`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:34:1
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 34 | struct Sudoku {
Dec 04 12:11:35.359 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: method is never used: `assign`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:41:5
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 04 12:11:35.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.359 INFO [stderr] 
Dec 04 12:11:35.359 INFO [stderr] warning: method is never used: `eliminate`
Dec 04 12:11:35.359 INFO [stderr]   --> src/main.rs:50:5
Dec 04 12:11:35.359 INFO [stderr]    |
Dec 04 12:11:35.359 INFO [stderr] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 04 12:11:35.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.360 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: struct is never constructed: `Possible`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:10:1
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 10 | struct Possible {
Dec 04 12:11:35.403 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: method is never used: `is_on`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:15:5
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 15 |     fn is_on(&self, i: u8) -> bool {
Dec 04 12:11:35.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: method is never used: `count`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:19:5
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 19 |     fn count(&self) -> u8 {
Dec 04 12:11:35.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: method is never used: `eliminate`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:25:5
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 25 |     fn eliminate(&mut self, i: u8) {
Dec 04 12:11:35.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: method is never used: `val`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:29:5
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 29 |     fn val(&self) -> u8 {
Dec 04 12:11:35.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: struct is never constructed: `Sudoku`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:34:1
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 34 | struct Sudoku {
Dec 04 12:11:35.403 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: method is never used: `assign`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:41:5
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 04 12:11:35.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.403 INFO [stderr] warning: method is never used: `eliminate`
Dec 04 12:11:35.403 INFO [stderr]   --> src/main.rs:50:5
Dec 04 12:11:35.403 INFO [stderr]    |
Dec 04 12:11:35.403 INFO [stderr] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 04 12:11:35.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 12:11:35.403 INFO [stderr] 
Dec 04 12:11:35.426 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Dec 04 12:11:35.428 INFO [stderr] su: No module specific data is present
Dec 04 12:11:36.566 INFO running `"docker" "inspect" "7e37add9ea6e52348bc695f064d318d00a696b6e4b6e5630c274f36f12c11f45"`
Dec 04 12:11:36.911 INFO running `"docker" "rm" "-f" "7e37add9ea6e52348bc695f064d318d00a696b6e4b6e5630c274f36f12c11f45"`
Dec 04 12:11:37.227 INFO [stdout] 7e37add9ea6e52348bc695f064d318d00a696b6e4b6e5630c274f36f12c11f45