[INFO] cloning repository https://github.com/alvarogonzalezsotillo/pruebas-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alvarogonzalezsotillo/pruebas-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvarogonzalezsotillo%2Fpruebas-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvarogonzalezsotillo%2Fpruebas-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fde97c2fe8a0f2e9d26b3aad0d08922f3765128f
[INFO] checking alvarogonzalezsotillo/pruebas-rust against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvarogonzalezsotillo%2Fpruebas-rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alvarogonzalezsotillo/pruebas-rust on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-3/source/Cargo.toml
[INFO] crate git repo https://github.com/alvarogonzalezsotillo/pruebas-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 88606a318aa4b83caa836d9e6727d2f94189ce7ed869939d666500f2cd170067
[INFO] running `Command { std: "docker" "start" "-a" "88606a318aa4b83caa836d9e6727d2f94189ce7ed869939d666500f2cd170067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88606a318aa4b83caa836d9e6727d2f94189ce7ed869939d666500f2cd170067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88606a318aa4b83caa836d9e6727d2f94189ce7ed869939d666500f2cd170067", kill_on_drop: false }`
[INFO] [stdout] 88606a318aa4b83caa836d9e6727d2f94189ce7ed869939d666500f2cd170067
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ad32d8e0d5fda3679617b06df1f9a8ff8a7bbc55361fa0e534e03aa12367cff
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8ad32d8e0d5fda3679617b06df1f9a8ff8a7bbc55361fa0e534e03aa12367cff", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling syn v0.15.44
[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]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking pruebas-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::crossteaser::Direction::*`
[INFO] [stdout]  --> src/crossteaser/crossteaser_search.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::crossteaser::Direction::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ravioli::*`
[INFO] [stdout]  --> src/crossteaser/crossteaser_search.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::ravioli::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::crossteaser::Direction::*`
[INFO] [stdout]  --> src/crossteaser/crossteaser_search.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::crossteaser::Direction::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ravioli::*`
[INFO] [stdout]  --> src/crossteaser/crossteaser_search.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::ravioli::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::crossteaser::*`
[INFO] [stdout]   --> src/crossteaser/crossteaser_search.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     use crate::crossteaser::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::search::*`
[INFO] [stdout]   --> src/crossteaser/crossteaser_search.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     use crate::search::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ravioli::*`
[INFO] [stdout]   --> src/crossteaser/crossteaser_search.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     use crate::ravioli::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::crossteaser::Color::*`
[INFO] [stdout]    --> src/crossteaser.rs:425:9
[INFO] [stdout]     |
[INFO] [stdout] 425 |     use crate::crossteaser::Color::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]  --> src/search/astar.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::Ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Formatter`, `Result`
[INFO] [stdout]  --> src/search/astar.rs:2:25
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{Display, Formatter, Result, Debug};
[INFO] [stdout]   |                         ^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/search/astar.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/search/astar.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hasher`
[INFO] [stdout]  --> src/search/astar.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::hash::Hasher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]  --> src/search.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::Ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/search.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]  --> src/search/astar.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::Ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Debug`, `Formatter`, `Result`
[INFO] [stdout]  --> src/search/astar.rs:2:25
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{Display, Formatter, Result, Debug};
[INFO] [stdout]   |                         ^^^^^^^^^  ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/search/astar.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/search/astar.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hasher`
[INFO] [stdout]  --> src/search/astar.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::hash::Hasher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `already_in_not_expanded`
[INFO] [stdout]    --> src/search/astar.rs:113:25
[INFO] [stdout]     |
[INFO] [stdout] 113 |             if let Some(already_in_not_expanded) = not_expanded_nodes.get(&child){
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_already_in_not_expanded`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C1`
[INFO] [stdout]  --> src/crossteaser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     C1,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C2`
[INFO] [stdout]  --> src/crossteaser.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     C2,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C3`
[INFO] [stdout]  --> src/crossteaser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     C3,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C4`
[INFO] [stdout]   --> src/crossteaser.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     C4,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C5`
[INFO] [stdout]   --> src/crossteaser.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     C5,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C6`
[INFO] [stdout]   --> src/crossteaser.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     C6
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `letter`
[INFO] [stdout]   --> src/crossteaser.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn letter(&self) -> char {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compute_rotations`
[INFO] [stdout]   --> src/crossteaser.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn compute_rotations(pieces: &Vec<Piece>) -> Vec<[usize;4]> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `index_of_piece`
[INFO] [stdout]    --> src/crossteaser.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn index_of_piece(piece: &Piece, vec: &Vec<Piece>) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `index_of`
[INFO] [stdout]    --> src/crossteaser.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn index_of(&self, piece: &Piece ) -> Option<usize> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compute_pieces_from`
[INFO] [stdout]    --> src/crossteaser.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn compute_pieces_from(piece: &Piece) -> Vec<Piece> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_piece`
[INFO] [stdout]    --> src/crossteaser.rs:144:12
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn from_piece<'b>(piece: &'b Piece) -> PieceSet {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `seed`
[INFO] [stdout]    --> src/crossteaser.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 160 |     pub fn seed() -> Piece {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `color`
[INFO] [stdout]    --> src/crossteaser.rs:165:12
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn color(&self, d: Direction) -> Color {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotations`
[INFO] [stdout]    --> src/crossteaser.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn rotations(&self) -> [Piece;4]{
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotate`
[INFO] [stdout]    --> src/crossteaser.rs:182:12
[INFO] [stdout]     |
[INFO] [stdout] 182 |     pub fn rotate(&self, d: Direction ) -> Piece{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `children_filtered`
[INFO] [stdout]    --> src/crossteaser.rs:279:12
[INFO] [stdout]     |
[INFO] [stdout] 279 |     pub fn children_filtered(&self) -> Vec<Board<'a>>{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ascii_art`
[INFO] [stdout]    --> src/crossteaser.rs:286:12
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub fn ascii_art(&self) -> [[char;9];9] {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ascii_art_string`
[INFO] [stdout]    --> src/crossteaser.rs:317:12
[INFO] [stdout]     |
[INFO] [stdout] 317 |     pub fn ascii_art_string(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_one_piece`
[INFO] [stdout]    --> src/crossteaser.rs:326:12
[INFO] [stdout]     |
[INFO] [stdout] 326 |     pub fn from_one_piece(piece_set:&'a PieceSet, coords: (usize,usize), piece: usize ) -> Board<'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_initial`
[INFO] [stdout]    --> src/crossteaser.rs:335:12
[INFO] [stdout]     |
[INFO] [stdout] 335 |     pub fn from_initial(piece_set:&'a PieceSet, piece_index: usize) -> Board<'a>{
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]    --> src/search/astar.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     use std::fmt::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/ravioli.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let c = b.clone();
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o2a`
[INFO] [stdout]    --> src/ravioli.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let o2a = o1a.clone();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_o2a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `already_in_not_expanded`
[INFO] [stdout]    --> src/search/astar.rs:113:25
[INFO] [stdout]     |
[INFO] [stdout] 113 |             if let Some(already_in_not_expanded) = not_expanded_nodes.get(&child){
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_already_in_not_expanded`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `index_of`
[INFO] [stdout]    --> src/crossteaser.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn index_of(&self, piece: &Piece ) -> Option<usize> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.55s
[INFO] running `Command { std: "docker" "inspect" "8ad32d8e0d5fda3679617b06df1f9a8ff8a7bbc55361fa0e534e03aa12367cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ad32d8e0d5fda3679617b06df1f9a8ff8a7bbc55361fa0e534e03aa12367cff", kill_on_drop: false }`
[INFO] [stdout] 8ad32d8e0d5fda3679617b06df1f9a8ff8a7bbc55361fa0e534e03aa12367cff