[INFO] updating cached repository https://github.com/alvarogonzalezsotillo/pruebas-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/alvarogonzalezsotillo/pruebas-rust
[INFO] [stderr]    e632a91..b4608ea  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b4608eac45007bf18d13f87ec750bdbbbdd5e226
[INFO] checking alvarogonzalezsotillo/pruebas-rust against try#f88e9a4452e792c29632101b348a1df9876d45cd for pr-70087
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvarogonzalezsotillo%2Fpruebas-rust" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alvarogonzalezsotillo/pruebas-rust on toolchain f88e9a4452e792c29632101b348a1df9876d45cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f88e9a4452e792c29632101b348a1df9876d45cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/alvarogonzalezsotillo/pruebas-rust
[INFO] finished tweaking git repo https://github.com/alvarogonzalezsotillo/pruebas-rust
[INFO] tweaked toml for git repo https://github.com/alvarogonzalezsotillo/pruebas-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/alvarogonzalezsotillo/pruebas-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f88e9a4452e792c29632101b348a1df9876d45cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+f88e9a4452e792c29632101b348a1df9876d45cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 37481bdd026bb266179b9236b6be1ad23c6d66f58a970125b3d39d9e4aad6a4a
[INFO] running `"docker" "start" "-a" "37481bdd026bb266179b9236b6be1ad23c6d66f58a970125b3d39d9e4aad6a4a"`
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking pruebas-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/search.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Ref`
[INFO] [stderr]  --> src/search.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::Ref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> src/search.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::DerefMut`
[INFO] [stderr]  --> src/search.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::DerefMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C1`
[INFO] [stderr]  --> src/crossteaser.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     C1,
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C2`
[INFO] [stderr]  --> src/crossteaser.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     C2,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C3`
[INFO] [stderr]  --> src/crossteaser.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     C3,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C4`
[INFO] [stderr]  --> src/crossteaser.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     C4,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C5`
[INFO] [stderr]  --> src/crossteaser.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     C5,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C6`
[INFO] [stderr]   --> src/crossteaser.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     C6
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `letter`
[INFO] [stderr]   --> src/crossteaser.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn letter(&self) -> char {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_u8`
[INFO] [stderr]   --> src/crossteaser.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn from_u8(d: u8) -> Option<Direction>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `traslate`
[INFO] [stderr]   --> src/crossteaser.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn traslate(&self, coords: (i8,i8) ) -> (i8,i8){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `opposite`
[INFO] [stderr]   --> src/crossteaser.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn opposite(&self) -> Direction{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compute_rotations`
[INFO] [stderr]   --> src/crossteaser.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn compute_rotations(pieces: &Vec<Piece>) -> Vec<[usize;4]> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `index_of_piece`
[INFO] [stderr]    --> src/crossteaser.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     fn index_of_piece(piece: &Piece, vec: &Vec<Piece>) -> Option<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `index_of`
[INFO] [stderr]    --> src/crossteaser.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn index_of(&self, piece: &Piece ) -> Option<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rotate`
[INFO] [stderr]    --> src/crossteaser.rs:109:5
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn rotate(&self, index: usize, direction: usize ) -> usize{
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compute_pieces_from`
[INFO] [stderr]    --> src/crossteaser.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn compute_pieces_from(piece: &Piece) -> Vec<Piece> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_piece`
[INFO] [stderr]    --> src/crossteaser.rs:142:5
[INFO] [stderr]     |
[INFO] [stderr] 142 |     pub fn from_piece<'b>(piece: &'b Piece) -> PieceSet {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `seed`
[INFO] [stderr]    --> src/crossteaser.rs:158:5
[INFO] [stderr]     |
[INFO] [stderr] 158 |     pub fn seed() -> Piece {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `color`
[INFO] [stderr]    --> src/crossteaser.rs:163:5
[INFO] [stderr]     |
[INFO] [stderr] 163 |     pub fn color(&self, d: Direction) -> Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rotations`
[INFO] [stderr]    --> src/crossteaser.rs:167:5
[INFO] [stderr]     |
[INFO] [stderr] 167 |     fn rotations(&self) -> [Piece;4]{
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rotate`
[INFO] [stderr]    --> src/crossteaser.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     pub fn rotate(&self, d: Direction ) -> Piece{
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `piece_set`
[INFO] [stderr]    --> src/crossteaser.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 |     piece_set : &'a PieceSet,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `coords_to_i8`
[INFO] [stderr]    --> src/crossteaser.rs:245:5
[INFO] [stderr]     |
[INFO] [stderr] 245 |     pub fn coords_to_i8( coords: (usize,usize) ) -> (i8,i8) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `coords_to_usize`
[INFO] [stderr]    --> src/crossteaser.rs:249:5
[INFO] [stderr]     |
[INFO] [stderr] 249 |     pub fn coords_to_usize( coords: (i8,i8) ) -> (usize,usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `children`
[INFO] [stderr]    --> src/crossteaser.rs:254:5
[INFO] [stderr]     |
[INFO] [stderr] 254 |     pub fn children(&self) -> Vec<Option<Board<'a>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ascii_art`
[INFO] [stderr]    --> src/crossteaser.rs:263:5
[INFO] [stderr]     |
[INFO] [stderr] 263 |     pub fn ascii_art(&self) -> [[char;9];9] {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ascii_art_string`
[INFO] [stderr]    --> src/crossteaser.rs:296:5
[INFO] [stderr]     |
[INFO] [stderr] 296 |     pub fn ascii_art_string(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `one_piece`
[INFO] [stderr]    --> src/crossteaser.rs:305:5
[INFO] [stderr]     |
[INFO] [stderr] 305 |     pub fn one_piece(piece_set:&'a PieceSet, coords: (usize,usize), piece: usize ) -> Board<'a> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]    --> src/crossteaser.rs:314:5
[INFO] [stderr]     |
[INFO] [stderr] 314 |     pub fn empty() -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]    --> src/crossteaser.rs:318:5
[INFO] [stderr]     |
[INFO] [stderr] 318 |     pub fn is_empty(&self, coords: (usize,usize) ) -> bool{
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty_coords`
[INFO] [stderr]    --> src/crossteaser.rs:322:5
[INFO] [stderr]     |
[INFO] [stderr] 322 |     pub fn empty_coords(&self) -> (usize,usize){
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `inside`
[INFO] [stderr]    --> src/crossteaser.rs:333:5
[INFO] [stderr]     |
[INFO] [stderr] 333 |     pub fn inside( &self, coords: (i8,i8) ) -> bool{
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rotate`
[INFO] [stderr]    --> src/crossteaser.rs:340:5
[INFO] [stderr]     |
[INFO] [stderr] 340 |     pub fn rotate(&self, coords: (usize,usize), d: Direction) -> Option<Board<'a>>{
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_root`
[INFO] [stderr]   --> src/search.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn new_root(state: T) -> Self{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_child`
[INFO] [stderr]   --> src/search.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn new_child<T:State>(node : &O<SearchNode<T>>, new_state: T) -> SearchNode<T>{
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `root_path`
[INFO] [stderr]   --> src/search.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn root_path<T:State>(node: &O<SearchNode<T>> ) -> Vec<O<SearchNode<T>>>{
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `expand_node`
[INFO] [stderr]   --> src/search.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn expand_node<T:State>(node: &O<SearchNode<T>>) -> Vec<O<SearchNode<T>>>{
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Search`
[INFO] [stderr]   --> src/search.rs:73:8
[INFO] [stderr]    |
[INFO] [stderr] 73 | struct Search<T:State>{
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `deep_first_search`
[INFO] [stderr]   --> src/search.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn deep_first_search<T:State + std::fmt::Debug>(root:T) -> Option<O<SearchNode<T>>>{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::crossteaser::Color::*`
[INFO] [stderr]    --> src/crossteaser.rs:384:9
[INFO] [stderr]     |
[INFO] [stderr] 384 |     use crate::crossteaser::Color::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/search.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::DerefMut`
[INFO] [stderr]  --> src/search.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::DerefMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]    --> src/ravioli.rs:110:13
[INFO] [stderr]     |
[INFO] [stderr] 110 |         let c = b.clone();
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `o2a`
[INFO] [stderr]    --> src/ravioli.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let o2a = o1a.clone();
[INFO] [stderr]     |             ^^^ help: consider prefixing with an underscore: `_o2a`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `index_of`
[INFO] [stderr]    --> src/crossteaser.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn index_of(&self, piece: &Piece ) -> Option<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `coords_to_i8`
[INFO] [stderr]    --> src/crossteaser.rs:245:5
[INFO] [stderr]     |
[INFO] [stderr] 245 |     pub fn coords_to_i8( coords: (usize,usize) ) -> (i8,i8) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `coords_to_usize`
[INFO] [stderr]    --> src/crossteaser.rs:249:5
[INFO] [stderr]     |
[INFO] [stderr] 249 |     pub fn coords_to_usize( coords: (i8,i8) ) -> (usize,usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `children`
[INFO] [stderr]    --> src/crossteaser.rs:254:5
[INFO] [stderr]     |
[INFO] [stderr] 254 |     pub fn children(&self) -> Vec<Option<Board<'a>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty_coords`
[INFO] [stderr]    --> src/crossteaser.rs:322:5
[INFO] [stderr]     |
[INFO] [stderr] 322 |     pub fn empty_coords(&self) -> (usize,usize){
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Search`
[INFO] [stderr]   --> src/search.rs:73:8
[INFO] [stderr]    |
[INFO] [stderr] 73 | struct Search<T:State>{
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.13s
[INFO] running `"docker" "inspect" "37481bdd026bb266179b9236b6be1ad23c6d66f58a970125b3d39d9e4aad6a4a"`
[INFO] running `"docker" "rm" "-f" "37481bdd026bb266179b9236b6be1ad23c6d66f58a970125b3d39d9e4aad6a4a"`
[INFO] [stdout] 37481bdd026bb266179b9236b6be1ad23c6d66f58a970125b3d39d9e4aad6a4a