Dec 17 17:35:35.623 INFO checking proudzhu/sudoku-norvig against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 17:35:35.623 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 17:35:35.996 INFO [stdout] 4f8ea1226c496f9d916fc363918389509e6e6d30dca6e1a3f71e01220a2749a1
Dec 17 17:35:35.998 INFO running `"docker" "start" "-a" "4f8ea1226c496f9d916fc363918389509e6e6d30dca6e1a3f71e01220a2749a1"`
Dec 17 17:35:37.144 INFO [stderr]     Checking norvig v0.1.0 (/opt/crater/workdir)
Dec 17 17:35:37.411 INFO [stderr] warning: struct is never constructed: `Possible`
Dec 17 17:35:37.411 INFO [stderr]   --> src/main.rs:10:1
Dec 17 17:35:37.411 INFO [stderr]    |
Dec 17 17:35:37.411 INFO [stderr] 10 | struct Possible {
Dec 17 17:35:37.411 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 17 17:35:37.411 INFO [stderr]    |
Dec 17 17:35:37.411 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 17:35:37.411 INFO [stderr] 
Dec 17 17:35:37.411 INFO [stderr] warning: method is never used: `is_on`
Dec 17 17:35:37.411 INFO [stderr]   --> src/main.rs:15:5
Dec 17 17:35:37.411 INFO [stderr]    |
Dec 17 17:35:37.411 INFO [stderr] 15 |     fn is_on(&self, i: u8) -> bool {
Dec 17 17:35:37.411 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.411 INFO [stderr] 
Dec 17 17:35:37.411 INFO [stderr] warning: method is never used: `count`
Dec 17 17:35:37.411 INFO [stderr]   --> src/main.rs:19:5
Dec 17 17:35:37.411 INFO [stderr]    |
Dec 17 17:35:37.411 INFO [stderr] 19 |     fn count(&self) -> u8 {
Dec 17 17:35:37.411 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.411 INFO [stderr] 
Dec 17 17:35:37.411 INFO [stderr] warning: method is never used: `eliminate`
Dec 17 17:35:37.411 INFO [stderr]   --> src/main.rs:25:5
Dec 17 17:35:37.411 INFO [stderr]    |
Dec 17 17:35:37.411 INFO [stderr] 25 |     fn eliminate(&mut self, i: u8) {
Dec 17 17:35:37.411 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.411 INFO [stderr] 
Dec 17 17:35:37.412 INFO [stderr] warning: method is never used: `val`
Dec 17 17:35:37.412 INFO [stderr]   --> src/main.rs:29:5
Dec 17 17:35:37.412 INFO [stderr]    |
Dec 17 17:35:37.412 INFO [stderr] 29 |     fn val(&self) -> u8 {
Dec 17 17:35:37.412 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.412 INFO [stderr] 
Dec 17 17:35:37.412 INFO [stderr] warning: struct is never constructed: `Sudoku`
Dec 17 17:35:37.412 INFO [stderr]   --> src/main.rs:34:1
Dec 17 17:35:37.412 INFO [stderr]    |
Dec 17 17:35:37.412 INFO [stderr] 34 | struct Sudoku {
Dec 17 17:35:37.412 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 17 17:35:37.412 INFO [stderr] 
Dec 17 17:35:37.412 INFO [stderr] warning: method is never used: `assign`
Dec 17 17:35:37.412 INFO [stderr]   --> src/main.rs:41:5
Dec 17 17:35:37.412 INFO [stderr]    |
Dec 17 17:35:37.412 INFO [stderr] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 17 17:35:37.412 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.412 INFO [stderr] 
Dec 17 17:35:37.412 INFO [stderr] warning: method is never used: `eliminate`
Dec 17 17:35:37.412 INFO [stderr]   --> src/main.rs:50:5
Dec 17 17:35:37.412 INFO [stderr]    |
Dec 17 17:35:37.412 INFO [stderr] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 17 17:35:37.412 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.412 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: struct is never constructed: `Possible`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:10:1
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 10 | struct Possible {
Dec 17 17:35:37.434 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: method is never used: `is_on`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:15:5
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 15 |     fn is_on(&self, i: u8) -> bool {
Dec 17 17:35:37.434 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: method is never used: `count`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:19:5
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 19 |     fn count(&self) -> u8 {
Dec 17 17:35:37.434 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: method is never used: `eliminate`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:25:5
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 25 |     fn eliminate(&mut self, i: u8) {
Dec 17 17:35:37.434 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: method is never used: `val`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:29:5
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 29 |     fn val(&self) -> u8 {
Dec 17 17:35:37.434 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: struct is never constructed: `Sudoku`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:34:1
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 34 | struct Sudoku {
Dec 17 17:35:37.434 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: method is never used: `assign`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:41:5
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 41 |     fn assign(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 17 17:35:37.434 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.434 INFO [stderr] warning: method is never used: `eliminate`
Dec 17 17:35:37.434 INFO [stderr]   --> src/main.rs:50:5
Dec 17 17:35:37.434 INFO [stderr]    |
Dec 17 17:35:37.434 INFO [stderr] 50 |     fn eliminate(&mut self, grid: &[Vec<u8>], row: usize, col: usize, d: u8) -> bool {
Dec 17 17:35:37.434 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 17:35:37.434 INFO [stderr] 
Dec 17 17:35:37.457 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
Dec 17 17:35:37.935 INFO running `"docker" "inspect" "4f8ea1226c496f9d916fc363918389509e6e6d30dca6e1a3f71e01220a2749a1"`
Dec 17 17:35:38.114 INFO running `"docker" "rm" "-f" "4f8ea1226c496f9d916fc363918389509e6e6d30dca6e1a3f71e01220a2749a1"`
Dec 17 17:35:38.251 INFO [stdout] 4f8ea1226c496f9d916fc363918389509e6e6d30dca6e1a3f71e01220a2749a1