Dec 18 08:33:29.415 INFO checking Anfauglith/sudoku against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:33:29.415 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/Anfauglith/sudoku:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:33:29.918 INFO [stdout] ac86f80386c33748381346a6069374648b27295a6d10de70a754e26ec575dfb4
Dec 18 08:33:29.922 INFO running `"docker" "start" "-a" "ac86f80386c33748381346a6069374648b27295a6d10de70a754e26ec575dfb4"`
Dec 18 08:33:31.564 INFO [stderr]     Checking sudoku v0.1.0 (/opt/crater/workdir)
Dec 18 08:33:32.180 INFO [stderr] warning: constant item is never used: `CANDIDATE_MASK`
Dec 18 08:33:32.180 INFO [stderr]  --> src/field.rs:2:1
Dec 18 08:33:32.180 INFO [stderr]   |
Dec 18 08:33:32.180 INFO [stderr] 2 | const CANDIDATE_MASK: u16 = 0b0000_0011_1111_1110; // 0x03FE
Dec 18 08:33:32.180 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.180 INFO [stderr]   |
Dec 18 08:33:32.180 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 08:33:32.180 INFO [stderr] 
Dec 18 08:33:32.180 INFO [stderr] warning: struct is never constructed: `Field`
Dec 18 08:33:32.180 INFO [stderr]  --> src/field.rs:4:1
Dec 18 08:33:32.180 INFO [stderr]   |
Dec 18 08:33:32.180 INFO [stderr] 4 | pub struct Field {
Dec 18 08:33:32.180 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 18 08:33:32.180 INFO [stderr] 
Dec 18 08:33:32.180 INFO [stderr] warning: struct is never constructed: `Cell`
Dec 18 08:33:32.180 INFO [stderr]  --> src/field.rs:8:1
Dec 18 08:33:32.180 INFO [stderr]   |
Dec 18 08:33:32.180 INFO [stderr] 8 | pub struct Cell {
Dec 18 08:33:32.180 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 18 08:33:32.180 INFO [stderr] 
Dec 18 08:33:32.180 INFO [stderr] warning: method is never used: `empty_cell`
Dec 18 08:33:32.180 INFO [stderr]   --> src/field.rs:16:5
Dec 18 08:33:32.180 INFO [stderr]    |
Dec 18 08:33:32.180 INFO [stderr] 16 |     pub fn empty_cell() -> Cell {
Dec 18 08:33:32.180 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.180 INFO [stderr] 
Dec 18 08:33:32.180 INFO [stderr] warning: method is never used: `fixed_cell`
Dec 18 08:33:32.180 INFO [stderr]   --> src/field.rs:24:5
Dec 18 08:33:32.180 INFO [stderr]    |
Dec 18 08:33:32.180 INFO [stderr] 24 |     pub fn fixed_cell(digit: u8) -> Cell {
Dec 18 08:33:32.181 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.181 INFO [stderr] 
Dec 18 08:33:32.181 INFO [stderr] warning: method is never used: `is_solved`
Dec 18 08:33:32.181 INFO [stderr]   --> src/field.rs:32:5
Dec 18 08:33:32.181 INFO [stderr]    |
Dec 18 08:33:32.181 INFO [stderr] 32 |     pub fn is_solved(&self) -> bool {
Dec 18 08:33:32.181 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.181 INFO [stderr] 
Dec 18 08:33:32.181 INFO [stderr] warning: method is never used: `is_fixed`
Dec 18 08:33:32.181 INFO [stderr]   --> src/field.rs:39:5
Dec 18 08:33:32.181 INFO [stderr]    |
Dec 18 08:33:32.181 INFO [stderr] 39 |     pub fn is_fixed(&self) -> bool {
Dec 18 08:33:32.181 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.181 INFO [stderr] 
Dec 18 08:33:32.181 INFO [stderr] warning: method is never used: `get_digit`
Dec 18 08:33:32.181 INFO [stderr]   --> src/field.rs:43:5
Dec 18 08:33:32.181 INFO [stderr]    |
Dec 18 08:33:32.181 INFO [stderr] 43 |     pub fn get_digit(&self) -> Option<u8> {
Dec 18 08:33:32.181 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.181 INFO [stderr] 
Dec 18 08:33:32.188 INFO [stderr] warning: method is never used: `fix`
Dec 18 08:33:32.188 INFO [stderr]   --> src/field.rs:47:5
Dec 18 08:33:32.188 INFO [stderr]    |
Dec 18 08:33:32.188 INFO [stderr] 47 |     fn fix(&mut self) -> bool {
Dec 18 08:33:32.188 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.188 INFO [stderr] 
Dec 18 08:33:32.188 INFO [stderr] warning: method is never used: `set_to`
Dec 18 08:33:32.188 INFO [stderr]   --> src/field.rs:55:5
Dec 18 08:33:32.188 INFO [stderr]    |
Dec 18 08:33:32.188 INFO [stderr] 55 |     fn set_to(&mut self, digit: u8) -> bool {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `fix_to`
Dec 18 08:33:32.189 INFO [stderr]   --> src/field.rs:66:5
Dec 18 08:33:32.189 INFO [stderr]    |
Dec 18 08:33:32.189 INFO [stderr] 66 |     pub fn fix_to(&mut self, digit: u8) -> bool {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `has_candidate`
Dec 18 08:33:32.189 INFO [stderr]   --> src/field.rs:73:5
Dec 18 08:33:32.189 INFO [stderr]    |
Dec 18 08:33:32.189 INFO [stderr] 73 |     pub fn has_candidate(&self, candidate: u8) -> bool {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `get_candidates`
Dec 18 08:33:32.189 INFO [stderr]   --> src/field.rs:77:5
Dec 18 08:33:32.189 INFO [stderr]    |
Dec 18 08:33:32.189 INFO [stderr] 77 |     pub fn get_candidates(&self) -> u16 {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `get_candidate_vector`
Dec 18 08:33:32.189 INFO [stderr]   --> src/field.rs:81:5
Dec 18 08:33:32.189 INFO [stderr]    |
Dec 18 08:33:32.189 INFO [stderr] 81 |     pub fn get_candidate_vector(&self) -> Vec<u8> {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `remove_candidate`
Dec 18 08:33:32.189 INFO [stderr]   --> src/field.rs:91:5
Dec 18 08:33:32.189 INFO [stderr]    |
Dec 18 08:33:32.189 INFO [stderr] 91 |     pub fn remove_candidate(&mut self, candidate: u8) {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `remove_candidates`
Dec 18 08:33:32.189 INFO [stderr]   --> src/field.rs:96:5
Dec 18 08:33:32.189 INFO [stderr]    |
Dec 18 08:33:32.189 INFO [stderr] 96 |     pub fn remove_candidates(&mut self, candidates: Vec<u8>) {
Dec 18 08:33:32.189 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `has_single_candidate`
Dec 18 08:33:32.189 INFO [stderr]    --> src/field.rs:102:5
Dec 18 08:33:32.189 INFO [stderr]     |
Dec 18 08:33:32.189 INFO [stderr] 102 |     pub fn has_single_candidate(&self) -> bool {
Dec 18 08:33:32.189 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `get_naked_single`
Dec 18 08:33:32.189 INFO [stderr]    --> src/field.rs:106:5
Dec 18 08:33:32.189 INFO [stderr]     |
Dec 18 08:33:32.189 INFO [stderr] 106 |     pub fn get_naked_single(&self) -> Option<u8> {
Dec 18 08:33:32.189 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.189 INFO [stderr] warning: method is never used: `try_solve`
Dec 18 08:33:32.189 INFO [stderr]    --> src/field.rs:119:5
Dec 18 08:33:32.189 INFO [stderr]     |
Dec 18 08:33:32.189 INFO [stderr] 119 |     pub fn try_solve(&mut self) -> bool {
Dec 18 08:33:32.189 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.189 INFO [stderr] 
Dec 18 08:33:32.354 INFO [stderr] warning: struct is never constructed: `Field`
Dec 18 08:33:32.354 INFO [stderr]  --> src/field.rs:4:1
Dec 18 08:33:32.354 INFO [stderr]   |
Dec 18 08:33:32.354 INFO [stderr] 4 | pub struct Field {
Dec 18 08:33:32.354 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 18 08:33:32.355 INFO [stderr]   |
Dec 18 08:33:32.355 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 08:33:32.355 INFO [stderr] 
Dec 18 08:33:32.355 INFO [stderr] warning: method is never used: `is_solved`
Dec 18 08:33:32.355 INFO [stderr]   --> src/field.rs:32:5
Dec 18 08:33:32.355 INFO [stderr]    |
Dec 18 08:33:32.355 INFO [stderr] 32 |     pub fn is_solved(&self) -> bool {
Dec 18 08:33:32.355 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:33:32.356 INFO [stderr] 
Dec 18 08:33:32.394 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
Dec 18 08:33:33.445 INFO running `"docker" "inspect" "ac86f80386c33748381346a6069374648b27295a6d10de70a754e26ec575dfb4"`
Dec 18 08:33:33.802 INFO running `"docker" "rm" "-f" "ac86f80386c33748381346a6069374648b27295a6d10de70a754e26ec575dfb4"`
Dec 18 08:33:34.160 INFO [stdout] ac86f80386c33748381346a6069374648b27295a6d10de70a754e26ec575dfb4