Dec 19 10:43:08.676 INFO checking proudzhu/sudoku-norvig against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:43:08.676 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/proudzhu/sudoku-norvig:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 10:43:09.220 INFO [stdout] 4e67db8ca5a2ca96b80c28626d5d446f5361e8af087d22dd01b89e087f991bd4
Dec 19 10:43:09.222 INFO running `"docker" "start" "-a" "4e67db8ca5a2ca96b80c28626d5d446f5361e8af087d22dd01b89e087f991bd4"`
Dec 19 10:43:11.429 INFO [stderr]     Checking norvig v0.1.0 (/opt/crater/workdir)
Dec 19 10:43:12.032 INFO [stderr] warning: struct is never constructed: `Possible`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:10:1
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 10 | struct Possible {
Dec 19 10:43:12.032 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 10:43:12.032 INFO [stderr] 
Dec 19 10:43:12.032 INFO [stderr] warning: method is never used: `is_on`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:15:5
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 15 |     fn is_on(&self, i: u8) -> bool {
Dec 19 10:43:12.032 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.032 INFO [stderr] 
Dec 19 10:43:12.032 INFO [stderr] warning: method is never used: `count`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:19:5
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 19 |     fn count(&self) -> u8 {
Dec 19 10:43:12.032 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.032 INFO [stderr] 
Dec 19 10:43:12.032 INFO [stderr] warning: method is never used: `eliminate`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:25:5
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 25 |     fn eliminate(&mut self, i: u8) {
Dec 19 10:43:12.032 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.032 INFO [stderr] 
Dec 19 10:43:12.032 INFO [stderr] warning: method is never used: `val`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:29:5
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 29 |     fn val(&self) -> u8 {
Dec 19 10:43:12.032 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.032 INFO [stderr] 
Dec 19 10:43:12.032 INFO [stderr] warning: struct is never constructed: `Sudoku`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:34:1
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 34 | struct Sudoku {
Dec 19 10:43:12.032 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 19 10:43:12.032 INFO [stderr] 
Dec 19 10:43:12.032 INFO [stderr] warning: method is never used: `assign`
Dec 19 10:43:12.032 INFO [stderr]   --> src/main.rs:41:5
Dec 19 10:43:12.032 INFO [stderr]    |
Dec 19 10:43:12.032 INFO [stderr] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 19 10:43:12.032 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.033 INFO [stderr] 
Dec 19 10:43:12.033 INFO [stderr] warning: method is never used: `eliminate`
Dec 19 10:43:12.033 INFO [stderr]   --> src/main.rs:50:5
Dec 19 10:43:12.033 INFO [stderr]    |
Dec 19 10:43:12.033 INFO [stderr] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 19 10:43:12.033 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.033 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: struct is never constructed: `Possible`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:10:1
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 10 | struct Possible {
Dec 19 10:43:12.108 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: method is never used: `is_on`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:15:5
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 15 |     fn is_on(&self, i: u8) -> bool {
Dec 19 10:43:12.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: method is never used: `count`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:19:5
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 19 |     fn count(&self) -> u8 {
Dec 19 10:43:12.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: method is never used: `eliminate`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:25:5
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 25 |     fn eliminate(&mut self, i: u8) {
Dec 19 10:43:12.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: method is never used: `val`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:29:5
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 29 |     fn val(&self) -> u8 {
Dec 19 10:43:12.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: struct is never constructed: `Sudoku`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:34:1
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 34 | struct Sudoku {
Dec 19 10:43:12.108 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: method is never used: `assign`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:41:5
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 19 10:43:12.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.108 INFO [stderr] 
Dec 19 10:43:12.108 INFO [stderr] warning: method is never used: `eliminate`
Dec 19 10:43:12.108 INFO [stderr]   --> src/main.rs:50:5
Dec 19 10:43:12.108 INFO [stderr]    |
Dec 19 10:43:12.108 INFO [stderr] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 19 10:43:12.109 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 10:43:12.109 INFO [stderr] 
Dec 19 10:43:12.156 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
Dec 19 10:43:13.028 INFO running `"docker" "inspect" "4e67db8ca5a2ca96b80c28626d5d446f5361e8af087d22dd01b89e087f991bd4"`
Dec 19 10:43:13.256 INFO running `"docker" "rm" "-f" "4e67db8ca5a2ca96b80c28626d5d446f5361e8af087d22dd01b89e087f991bd4"`
Dec 19 10:43:13.611 INFO [stdout] 4e67db8ca5a2ca96b80c28626d5d446f5361e8af087d22dd01b89e087f991bd4