[INFO] cloning repository https://github.com/mipdableep/readme_checkers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mipdableep/readme_checkers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmipdableep%2Freadme_checkers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmipdableep%2Freadme_checkers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fb89ec0b9107705016097893ba353217ac2443c5
[INFO] checking mipdableep/readme_checkers against try#54e27f559f23913c1d5afb1a0f0114e9e61b81b8 for pr-147589
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmipdableep%2Freadme_checkers" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mipdableep/readme_checkers
[INFO] finished tweaking git repo https://github.com/mipdableep/readme_checkers
[INFO] tweaked toml for git repo https://github.com/mipdableep/readme_checkers written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mipdableep/readme_checkers on toolchain 54e27f559f23913c1d5afb1a0f0114e9e61b81b8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+54e27f559f23913c1d5afb1a0f0114e9e61b81b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mipdableep/readme_checkers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+54e27f559f23913c1d5afb1a0f0114e9e61b81b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: dependencies.serde.opt-level
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded color-spantrace v0.3.0
[INFO] [stderr]   Downloaded owo-colors v4.2.1
[INFO] [stderr]   Downloaded color-eyre v0.6.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+54e27f559f23913c1d5afb1a0f0114e9e61b81b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8be3a7d21eeb32c1a309c5cdc1e521a151cd87e1f080d1cd88239f8b5a691bc
[INFO] running `Command { std: "docker" "start" "-a" "b8be3a7d21eeb32c1a309c5cdc1e521a151cd87e1f080d1cd88239f8b5a691bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8be3a7d21eeb32c1a309c5cdc1e521a151cd87e1f080d1cd88239f8b5a691bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8be3a7d21eeb32c1a309c5cdc1e521a151cd87e1f080d1cd88239f8b5a691bc", kill_on_drop: false }`
[INFO] [stdout] b8be3a7d21eeb32c1a309c5cdc1e521a151cd87e1f080d1cd88239f8b5a691bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+54e27f559f23913c1d5afb1a0f0114e9e61b81b8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3aaf4cf67391c905f1af6031fc49376a02dff186a9d04faa05f4175da60c47d
[INFO] running `Command { std: "docker" "start" "-a" "a3aaf4cf67391c905f1af6031fc49376a02dff186a9d04faa05f4175da60c47d", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: dependencies.serde.opt-level
[INFO] [stderr]     Checking tracing-core v0.1.34
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling owo-colors v4.2.1
[INFO] [stderr]    Compiling object v0.36.7
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling eyre v0.6.12
[INFO] [stderr]    Compiling color-spantrace v0.3.0
[INFO] [stderr]     Checking gimli v0.31.1
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking sharded-slab v0.1.7
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[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]     Checking rustc-demangle v0.1.25
[INFO] [stderr]    Compiling syn v2.0.102
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]     Checking tracing-error v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling derive_more-impl v2.0.1
[INFO] [stderr]     Checking addr2line v0.24.2
[INFO] [stderr]     Checking derive_more v2.0.1
[INFO] [stderr]     Checking backtrace v0.3.75
[INFO] [stderr]     Checking color-eyre v0.6.5
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking serde_json v1.0.140
[INFO] [stderr]     Checking readme_checkers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fmt::Display`
[INFO] [stdout]  --> src/checkers/game.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{fmt::Display, ops::Add};
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Board`, `Location`, `Move`, `PieceType`, and `get_leagal_moves`
[INFO] [stdout]  --> src/main.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use checkers::game::{get_leagal_moves, Board, Location, Move, PieceType};
[INFO] [stdout]   |                      ^^^^^^^^^^^^^^^^  ^^^^^  ^^^^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::Display`
[INFO] [stdout]  --> src/checkers/game.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{fmt::Display, ops::Add};
[INFO] [stdout]   |           ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::to_value`
[INFO] [stdout]    --> src/checkers/game.rs:405:9
[INFO] [stdout]     |
[INFO] [stdout] 405 |     use serde_json::to_value;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Board`, `Location`, `Move`, `PieceType`, and `get_leagal_moves`
[INFO] [stdout]  --> src/main.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use checkers::game::{get_leagal_moves, Board, Location, Move, PieceType};
[INFO] [stdout]   |                      ^^^^^^^^^^^^^^^^  ^^^^^  ^^^^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GameState` is never constructed
[INFO] [stdout]  --> src/checkers/game.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct GameState {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PieceType` is never used
[INFO] [stdout]   --> src/checkers/game.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub enum PieceType {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_color` is never used
[INFO] [stdout]   --> src/checkers/game.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl PieceType {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 32 |     fn get_color(&self) -> Color {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]   --> src/checkers/game.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub enum Color {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Location` is never constructed
[INFO] [stdout]   --> src/checkers/game.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct Location {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/checkers/game.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 57 | impl Location {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 58 |     pub fn new(row: i8, col: i8) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Move` is never constructed
[INFO] [stdout]   --> src/checkers/game.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Move {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/checkers/game.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 84 | impl Move {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 85 |     pub fn new(from: Location, to: Location, eat: Option<Location>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Board` is never constructed
[INFO] [stdout]   --> src/checkers/game.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub struct Board([[Option<PieceType>; 8]; 8]);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `print_board_indedex_with_loc_vec`, `print_board_index`, `print_board_squares`, `loc_index`, `new_game_board`, and `new` are never used
[INFO] [stdout]    --> src/checkers/game.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl Board {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 100 |     pub fn print_board_indedex_with_loc_vec(&self, locs: &[Location]) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     pub fn print_board_index(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     pub fn print_board_squares(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 213 |     pub fn loc_index(&self, loc: &Location) -> Result<Option<PieceType>> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 219 |     pub fn new_game_board() -> Board {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 236 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_leagal_moves` is never used
[INFO] [stdout]    --> src/checkers/game.rs:241:8
[INFO] [stdout]     |
[INFO] [stdout] 241 | pub fn get_leagal_moves(board: &Board, loc: Location, last_move: Move) -> Vec<Move> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_moves_soldier` is never used
[INFO] [stdout]    --> src/checkers/game.rs:266:4
[INFO] [stdout]     |
[INFO] [stdout] 266 | fn get_moves_soldier(board: &Board, loc: Location, piece: PieceType, last_move: Move) -> Vec<Move> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_moves_soldier_from_modif_vec` is never used
[INFO] [stdout]    --> src/checkers/game.rs:305:4
[INFO] [stdout]     |
[INFO] [stdout] 305 | fn get_moves_soldier_from_modif_vec(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_possible_move_or_eat_soldier` is never used
[INFO] [stdout]    --> src/checkers/game.rs:331:4
[INFO] [stdout]     |
[INFO] [stdout] 331 | fn get_possible_move_or_eat_soldier(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_possible_eat_soldier` is never used
[INFO] [stdout]    --> src/checkers/game.rs:354:4
[INFO] [stdout]     |
[INFO] [stdout] 354 | fn get_possible_eat_soldier(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `DIRECTIONS` is never used
[INFO] [stdout]    --> src/checkers/game.rs:372:8
[INFO] [stdout]     |
[INFO] [stdout] 372 | static DIRECTIONS: [(i8, i8); 4] = [(-1, -1), (-1, 1), (1, 1), (1, -1)];
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_moves_queen` is never used
[INFO] [stdout]    --> src/checkers/game.rs:374:4
[INFO] [stdout]     |
[INFO] [stdout] 374 | fn get_moves_queen(board: &Board, piece: PieceType, loc: Location, last_move: Move) -> Vec<Move> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GameState` is never constructed
[INFO] [stdout]  --> src/checkers/game.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct GameState {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `print_board_indedex_with_loc_vec` and `print_board_squares` are never used
[INFO] [stdout]    --> src/checkers/game.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl Board {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] 100 |     pub fn print_board_indedex_with_loc_vec(&self, locs: &[Location]) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     pub fn print_board_squares(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.71s
[INFO] running `Command { std: "docker" "inspect" "a3aaf4cf67391c905f1af6031fc49376a02dff186a9d04faa05f4175da60c47d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3aaf4cf67391c905f1af6031fc49376a02dff186a9d04faa05f4175da60c47d", kill_on_drop: false }`
[INFO] [stdout] a3aaf4cf67391c905f1af6031fc49376a02dff186a9d04faa05f4175da60c47d