Dec 17 23:02:40.178 INFO checking ieiriyuki/my-rust-reversi against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 23:02:40.178 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/ieiriyuki/my-rust-reversi:/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 17 23:02:40.591 INFO [stdout] 53af97af2a68004987f6216e5b7e9180ebc51e2833fd3a3cc9814abe35b93ff1
Dec 17 23:02:40.593 INFO running `"docker" "start" "-a" "53af97af2a68004987f6216e5b7e9180ebc51e2833fd3a3cc9814abe35b93ff1"`
Dec 17 23:02:43.087 INFO [stderr]     Checking rayon-core v1.4.0
Dec 17 23:02:43.988 INFO [stderr]     Checking rayon v1.0.0
Dec 17 23:02:47.081 INFO [stderr]     Checking reversi v0.1.0 (/opt/crater/workdir)
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `rhs`
Dec 17 23:02:47.704 INFO [stderr]   --> src/coord.rs:11:18
Dec 17 23:02:47.704 INFO [stderr]    |
Dec 17 23:02:47.704 INFO [stderr] 11 |     fn add(self, rhs: Self) -> Self::Output {
Dec 17 23:02:47.704 INFO [stderr]    |                  ^^^ help: consider using `_rhs` instead
Dec 17 23:02:47.704 INFO [stderr]    |
Dec 17 23:02:47.704 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 23:02:47.704 INFO [stderr] 
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `rhs`
Dec 17 23:02:47.704 INFO [stderr]   --> src/coord.rs:17:30
Dec 17 23:02:47.704 INFO [stderr]    |
Dec 17 23:02:47.704 INFO [stderr] 17 |     fn add_assign(&mut self, rhs: Self) {
Dec 17 23:02:47.704 INFO [stderr]    |                              ^^^ help: consider using `_rhs` instead
Dec 17 23:02:47.704 INFO [stderr] 
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `index`
Dec 17 23:02:47.704 INFO [stderr]   --> src/board.rs:50:21
Dec 17 23:02:47.704 INFO [stderr]    |
Dec 17 23:02:47.704 INFO [stderr] 50 |     fn index(&self, index: Coord) -> &Self::Output {
Dec 17 23:02:47.704 INFO [stderr]    |                     ^^^^^ help: consider using `_index` instead
Dec 17 23:02:47.704 INFO [stderr] 
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `index`
Dec 17 23:02:47.704 INFO [stderr]   --> src/board.rs:59:29
Dec 17 23:02:47.704 INFO [stderr]    |
Dec 17 23:02:47.704 INFO [stderr] 59 |     fn index_mut(&mut self, index: Coord) -> &mut Self::Output {
Dec 17 23:02:47.704 INFO [stderr]    |                             ^^^^^ help: consider using `_index` instead
Dec 17 23:02:47.704 INFO [stderr] 
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.704 INFO [stderr]    --> src/board.rs:153:24
Dec 17 23:02:47.704 INFO [stderr]     |
Dec 17 23:02:47.704 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.704 INFO [stderr]     |                        ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.704 INFO [stderr] 
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `pos`
Dec 17 23:02:47.704 INFO [stderr]    --> src/board.rs:153:42
Dec 17 23:02:47.704 INFO [stderr]     |
Dec 17 23:02:47.704 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.704 INFO [stderr]     |                                          ^^^ help: consider using `_pos` instead
Dec 17 23:02:47.704 INFO [stderr] 
Dec 17 23:02:47.704 INFO [stderr] warning: unused variable: `dir`
Dec 17 23:02:47.704 INFO [stderr]    --> src/board.rs:153:54
Dec 17 23:02:47.704 INFO [stderr]     |
Dec 17 23:02:47.704 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.705 INFO [stderr]     |                                                      ^^^ help: consider using `_dir` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:160:24
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 160 |     fn get_move(&self, piece: Piece, pos: Coord) -> Move {
Dec 17 23:02:47.705 INFO [stderr]     |                        ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `pos`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:160:38
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 160 |     fn get_move(&self, piece: Piece, pos: Coord) -> Move {
Dec 17 23:02:47.705 INFO [stderr]     |                                      ^^^ help: consider using `_pos` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:167:25
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 167 |     pub fn moves(&self, piece: Piece) -> Moves {
Dec 17 23:02:47.705 INFO [stderr]     |                         ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:172:29
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 172 |     fn count_mut(&mut self, piece: Piece) -> &mut u8 {
Dec 17 23:02:47.705 INFO [stderr]     |                             ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:184:27
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.705 INFO [stderr]     |                           ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `pos`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:184:45
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.705 INFO [stderr]     |                                             ^^^ help: consider using `_pos` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `dir`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:184:57
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.705 INFO [stderr]     |                                                         ^^^ help: consider using `_dir` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `flip`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:184:69
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.705 INFO [stderr]     |                                                                     ^^^^ help: consider using `_flip` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:189:31
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 189 |     pub fn do_move(&mut self, piece: Piece, mov: &Move) {
Dec 17 23:02:47.705 INFO [stderr]     |                               ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.705 INFO [stderr] warning: unused variable: `mov`
Dec 17 23:02:47.705 INFO [stderr]    --> src/board.rs:189:45
Dec 17 23:02:47.705 INFO [stderr]     |
Dec 17 23:02:47.705 INFO [stderr] 189 |     pub fn do_move(&mut self, piece: Piece, mov: &Move) {
Dec 17 23:02:47.705 INFO [stderr]     |                                             ^^^ help: consider using `_mov` instead
Dec 17 23:02:47.705 INFO [stderr] 
Dec 17 23:02:47.716 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:02:47.716 INFO [stderr]    --> src/board.rs:153:38
Dec 17 23:02:47.716 INFO [stderr]     |
Dec 17 23:02:47.716 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.716 INFO [stderr]     |                                      ----^^^
Dec 17 23:02:47.716 INFO [stderr]     |                                      |
Dec 17 23:02:47.716 INFO [stderr]     |                                      help: remove this `mut`
Dec 17 23:02:47.716 INFO [stderr]     |
Dec 17 23:02:47.716 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 23:02:47.716 INFO [stderr] 
Dec 17 23:02:47.716 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:02:47.716 INFO [stderr]    --> src/board.rs:184:41
Dec 17 23:02:47.716 INFO [stderr]     |
Dec 17 23:02:47.716 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.716 INFO [stderr]     |                                         ----^^^
Dec 17 23:02:47.716 INFO [stderr]     |                                         |
Dec 17 23:02:47.716 INFO [stderr]     |                                         help: remove this `mut`
Dec 17 23:02:47.716 INFO [stderr] 
Dec 17 23:02:47.736 INFO [stderr] warning: method is never used: `is_in_range`
Dec 17 23:02:47.736 INFO [stderr]   --> src/board.rs:34:5
Dec 17 23:02:47.736 INFO [stderr]    |
Dec 17 23:02:47.736 INFO [stderr] 34 |     pub fn is_in_range(&self, pos: Coord) -> bool {
Dec 17 23:02:47.736 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.736 INFO [stderr]    |
Dec 17 23:02:47.736 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 23:02:47.736 INFO [stderr] 
Dec 17 23:02:47.736 INFO [stderr] warning: method is never used: `size`
Dec 17 23:02:47.736 INFO [stderr]   --> src/board.rs:40:5
Dec 17 23:02:47.736 INFO [stderr]    |
Dec 17 23:02:47.736 INFO [stderr] 40 |     pub fn size(&self) -> usize {
Dec 17 23:02:47.736 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.736 INFO [stderr] 
Dec 17 23:02:47.736 INFO [stderr] warning: constant item is never used: `ZERO_FLIP`
Dec 17 23:02:47.736 INFO [stderr]   --> src/board.rs:85:1
Dec 17 23:02:47.736 INFO [stderr]    |
Dec 17 23:02:47.736 INFO [stderr] 85 | const ZERO_FLIP: [u8; 8] = [0, 0, 0, 0, 0, 0, 0, 0];
Dec 17 23:02:47.736 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.736 INFO [stderr] 
Dec 17 23:02:47.736 INFO [stderr] warning: method is never used: `is_legal`
Dec 17 23:02:47.736 INFO [stderr]    --> src/board.rs:101:5
Dec 17 23:02:47.736 INFO [stderr]     |
Dec 17 23:02:47.736 INFO [stderr] 101 |     pub fn is_legal(&self) -> bool {
Dec 17 23:02:47.736 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.736 INFO [stderr] 
Dec 17 23:02:47.736 INFO [stderr] warning: constant item is never used: `DIRECTIONS`
Dec 17 23:02:47.736 INFO [stderr]    --> src/board.rs:120:1
Dec 17 23:02:47.736 INFO [stderr]     |
Dec 17 23:02:47.736 INFO [stderr] 120 | / const DIRECTIONS: [Coord; 8] = [
Dec 17 23:02:47.736 INFO [stderr] 121 | |     Coord(-1, -1), //左上
Dec 17 23:02:47.736 INFO [stderr] 122 | |     Coord(0, -1),  //真上
Dec 17 23:02:47.736 INFO [stderr] 123 | |     Coord(1, -1),  //右上
Dec 17 23:02:47.736 INFO [stderr] ...   |
Dec 17 23:02:47.736 INFO [stderr] 128 | |     Coord(1, 1),   //右下
Dec 17 23:02:47.736 INFO [stderr] 129 | | ];
Dec 17 23:02:47.736 INFO [stderr]     | |__^
Dec 17 23:02:47.736 INFO [stderr] 
Dec 17 23:02:47.737 INFO [stderr] warning: method is never used: `get_flip`
Dec 17 23:02:47.737 INFO [stderr]    --> src/board.rs:153:5
Dec 17 23:02:47.737 INFO [stderr]     |
Dec 17 23:02:47.737 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.737 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.737 INFO [stderr] 
Dec 17 23:02:47.737 INFO [stderr] warning: method is never used: `get_move`
Dec 17 23:02:47.737 INFO [stderr]    --> src/board.rs:160:5
Dec 17 23:02:47.737 INFO [stderr]     |
Dec 17 23:02:47.737 INFO [stderr] 160 |     fn get_move(&self, piece: Piece, pos: Coord) -> Move {
Dec 17 23:02:47.737 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.737 INFO [stderr] 
Dec 17 23:02:47.737 INFO [stderr] warning: method is never used: `count_mut`
Dec 17 23:02:47.737 INFO [stderr]    --> src/board.rs:172:5
Dec 17 23:02:47.737 INFO [stderr]     |
Dec 17 23:02:47.737 INFO [stderr] 172 |     fn count_mut(&mut self, piece: Piece) -> &mut u8 {
Dec 17 23:02:47.737 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.737 INFO [stderr] 
Dec 17 23:02:47.737 INFO [stderr] warning: method is never used: `do_flip`
Dec 17 23:02:47.737 INFO [stderr]    --> src/board.rs:184:5
Dec 17 23:02:47.737 INFO [stderr]     |
Dec 17 23:02:47.737 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.737 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.737 INFO [stderr] 
Dec 17 23:02:47.737 INFO [stderr] warning: struct is never constructed: `DumbPlayer`
Dec 17 23:02:47.737 INFO [stderr]  --> src/players/dumb.rs:5:1
Dec 17 23:02:47.737 INFO [stderr]   |
Dec 17 23:02:47.737 INFO [stderr] 5 | pub struct DumbPlayer;
Dec 17 23:02:47.737 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.737 INFO [stderr] 
Dec 17 23:02:47.737 INFO [stderr] warning: method is never used: `new`
Dec 17 23:02:47.737 INFO [stderr]   --> src/players/negamax.rs:10:5
Dec 17 23:02:47.737 INFO [stderr]    |
Dec 17 23:02:47.737 INFO [stderr] 10 |     pub fn new(depth: usize) -> Self {
Dec 17 23:02:47.737 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.737 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `rhs`
Dec 17 23:02:47.878 INFO [stderr]   --> src/coord.rs:11:18
Dec 17 23:02:47.878 INFO [stderr]    |
Dec 17 23:02:47.878 INFO [stderr] 11 |     fn add(self, rhs: Self) -> Self::Output {
Dec 17 23:02:47.878 INFO [stderr]    |                  ^^^ help: consider using `_rhs` instead
Dec 17 23:02:47.878 INFO [stderr]    |
Dec 17 23:02:47.878 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `rhs`
Dec 17 23:02:47.878 INFO [stderr]   --> src/coord.rs:17:30
Dec 17 23:02:47.878 INFO [stderr]    |
Dec 17 23:02:47.878 INFO [stderr] 17 |     fn add_assign(&mut self, rhs: Self) {
Dec 17 23:02:47.878 INFO [stderr]    |                              ^^^ help: consider using `_rhs` instead
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `index`
Dec 17 23:02:47.878 INFO [stderr]   --> src/board.rs:50:21
Dec 17 23:02:47.878 INFO [stderr]    |
Dec 17 23:02:47.878 INFO [stderr] 50 |     fn index(&self, index: Coord) -> &Self::Output {
Dec 17 23:02:47.878 INFO [stderr]    |                     ^^^^^ help: consider using `_index` instead
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `index`
Dec 17 23:02:47.878 INFO [stderr]   --> src/board.rs:59:29
Dec 17 23:02:47.878 INFO [stderr]    |
Dec 17 23:02:47.878 INFO [stderr] 59 |     fn index_mut(&mut self, index: Coord) -> &mut Self::Output {
Dec 17 23:02:47.878 INFO [stderr]    |                             ^^^^^ help: consider using `_index` instead
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.878 INFO [stderr]    --> src/board.rs:153:24
Dec 17 23:02:47.878 INFO [stderr]     |
Dec 17 23:02:47.878 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.878 INFO [stderr]     |                        ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `pos`
Dec 17 23:02:47.878 INFO [stderr]    --> src/board.rs:153:42
Dec 17 23:02:47.878 INFO [stderr]     |
Dec 17 23:02:47.878 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.878 INFO [stderr]     |                                          ^^^ help: consider using `_pos` instead
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.878 INFO [stderr] warning: unused variable: `dir`
Dec 17 23:02:47.878 INFO [stderr]    --> src/board.rs:153:54
Dec 17 23:02:47.878 INFO [stderr]     |
Dec 17 23:02:47.878 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.878 INFO [stderr]     |                                                      ^^^ help: consider using `_dir` instead
Dec 17 23:02:47.878 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:160:24
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 160 |     fn get_move(&self, piece: Piece, pos: Coord) -> Move {
Dec 17 23:02:47.879 INFO [stderr]     |                        ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `pos`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:160:38
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 160 |     fn get_move(&self, piece: Piece, pos: Coord) -> Move {
Dec 17 23:02:47.879 INFO [stderr]     |                                      ^^^ help: consider using `_pos` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:167:25
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 167 |     pub fn moves(&self, piece: Piece) -> Moves {
Dec 17 23:02:47.879 INFO [stderr]     |                         ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:172:29
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 172 |     fn count_mut(&mut self, piece: Piece) -> &mut u8 {
Dec 17 23:02:47.879 INFO [stderr]     |                             ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:184:27
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.879 INFO [stderr]     |                           ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `pos`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:184:45
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.879 INFO [stderr]     |                                             ^^^ help: consider using `_pos` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `dir`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:184:57
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.879 INFO [stderr]     |                                                         ^^^ help: consider using `_dir` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `flip`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:184:69
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.879 INFO [stderr]     |                                                                     ^^^^ help: consider using `_flip` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `piece`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:189:31
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 189 |     pub fn do_move(&mut self, piece: Piece, mov: &Move) {
Dec 17 23:02:47.879 INFO [stderr]     |                               ^^^^^ help: consider using `_piece` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.879 INFO [stderr] warning: unused variable: `mov`
Dec 17 23:02:47.879 INFO [stderr]    --> src/board.rs:189:45
Dec 17 23:02:47.879 INFO [stderr]     |
Dec 17 23:02:47.879 INFO [stderr] 189 |     pub fn do_move(&mut self, piece: Piece, mov: &Move) {
Dec 17 23:02:47.879 INFO [stderr]     |                                             ^^^ help: consider using `_mov` instead
Dec 17 23:02:47.879 INFO [stderr] 
Dec 17 23:02:47.902 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:02:47.902 INFO [stderr]    --> src/board.rs:153:38
Dec 17 23:02:47.902 INFO [stderr]     |
Dec 17 23:02:47.902 INFO [stderr] 153 |     fn get_flip(&self, piece: Piece, mut pos: Coord, dir: Coord) -> u8 {
Dec 17 23:02:47.902 INFO [stderr]     |                                      ----^^^
Dec 17 23:02:47.902 INFO [stderr]     |                                      |
Dec 17 23:02:47.902 INFO [stderr]     |                                      help: remove this `mut`
Dec 17 23:02:47.902 INFO [stderr]     |
Dec 17 23:02:47.902 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 23:02:47.902 INFO [stderr] 
Dec 17 23:02:47.902 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:02:47.902 INFO [stderr]    --> src/board.rs:184:41
Dec 17 23:02:47.902 INFO [stderr]     |
Dec 17 23:02:47.902 INFO [stderr] 184 |     fn do_flip(&mut self, piece: Piece, mut pos: Coord, dir: Coord, flip: u8) {
Dec 17 23:02:47.902 INFO [stderr]     |                                         ----^^^
Dec 17 23:02:47.902 INFO [stderr]     |                                         |
Dec 17 23:02:47.902 INFO [stderr]     |                                         help: remove this `mut`
Dec 17 23:02:47.903 INFO [stderr] 
Dec 17 23:02:47.955 INFO [stderr] warning: constant item is never used: `DIRECTIONS`
Dec 17 23:02:47.955 INFO [stderr]    --> src/board.rs:120:1
Dec 17 23:02:47.955 INFO [stderr]     |
Dec 17 23:02:47.955 INFO [stderr] 120 | / const DIRECTIONS: [Coord; 8] = [
Dec 17 23:02:47.955 INFO [stderr] 121 | |     Coord(-1, -1), //左上
Dec 17 23:02:47.955 INFO [stderr] 122 | |     Coord(0, -1),  //真上
Dec 17 23:02:47.955 INFO [stderr] 123 | |     Coord(1, -1),  //右上
Dec 17 23:02:47.955 INFO [stderr] ...   |
Dec 17 23:02:47.956 INFO [stderr] 128 | |     Coord(1, 1),   //右下
Dec 17 23:02:47.956 INFO [stderr] 129 | | ];
Dec 17 23:02:47.956 INFO [stderr]     | |__^
Dec 17 23:02:47.956 INFO [stderr]     |
Dec 17 23:02:47.956 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 17 23:02:47.956 INFO [stderr] 
Dec 17 23:02:47.956 INFO [stderr] warning: struct is never constructed: `DumbPlayer`
Dec 17 23:02:47.956 INFO [stderr]  --> src/players/dumb.rs:5:1
Dec 17 23:02:47.956 INFO [stderr]   |
Dec 17 23:02:47.956 INFO [stderr] 5 | pub struct DumbPlayer;
Dec 17 23:02:47.956 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.956 INFO [stderr] 
Dec 17 23:02:47.956 INFO [stderr] warning: method is never used: `new`
Dec 17 23:02:47.956 INFO [stderr]   --> src/players/negamax.rs:10:5
Dec 17 23:02:47.956 INFO [stderr]    |
Dec 17 23:02:47.956 INFO [stderr] 10 |     pub fn new(depth: usize) -> Self {
Dec 17 23:02:47.956 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:02:47.956 INFO [stderr] 
Dec 17 23:02:47.987 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.96s
Dec 17 23:02:48.282 INFO running `"docker" "inspect" "53af97af2a68004987f6216e5b7e9180ebc51e2833fd3a3cc9814abe35b93ff1"`
Dec 17 23:02:48.374 INFO running `"docker" "rm" "-f" "53af97af2a68004987f6216e5b7e9180ebc51e2833fd3a3cc9814abe35b93ff1"`
Dec 17 23:02:48.473 INFO [stdout] 53af97af2a68004987f6216e5b7e9180ebc51e2833fd3a3cc9814abe35b93ff1