[INFO] cloning repository https://github.com/NChitty/chersed
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NChitty/chersed" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNChitty%2Fchersed", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNChitty%2Fchersed'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79d44b7d14db97dcdd3810b6a23cef158092ddc1
[INFO] linting NChitty/chersed against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNChitty%2Fchersed" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/NChitty/chersed
[INFO] finished tweaking git repo https://github.com/NChitty/chersed
[INFO] tweaked toml for git repo https://github.com/NChitty/chersed written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/NChitty/chersed on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/NChitty/chersed 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 115302db21e407d185befa0422125c391d600cf9a8177041dc35c804224e90ae
[INFO] running `Command { std: "docker" "start" "-a" "115302db21e407d185befa0422125c391d600cf9a8177041dc35c804224e90ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "115302db21e407d185befa0422125c391d600cf9a8177041dc35c804224e90ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "115302db21e407d185befa0422125c391d600cf9a8177041dc35c804224e90ae", kill_on_drop: false }`
[INFO] [stdout] 115302db21e407d185befa0422125c391d600cf9a8177041dc35c804224e90ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52cc84fd42bd9f235c8af1de33b9abbcd8c3121b158740596a2c755867ca6c95
[INFO] running `Command { std: "docker" "start" "-a" "52cc84fd42bd9f235c8af1de33b9abbcd8c3121b158740596a2c755867ca6c95", kill_on_drop: false }`
[INFO] [stderr]     Checking chersed v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `get_bitboard` is never used
[INFO] [stdout]    --> src/lib.rs:314:12
[INFO] [stdout]     |
[INFO] [stdout] 313 | impl GameState {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 314 |     pub fn get_bitboard(&self, piece: Piece) -> &Bitboard {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `.nth(0)` on a `std::iter::Iterator`, when `.next()` is equivalent
[INFO] [stdout]   --> src/lib.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         str.chars().nth(0)?.to_digit(16)? as u8 - 10 * 8 + str.chars().nth(1)?.to_digit(10)? as u8
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: try calling `.next()` instead of `.nth(0)`: `str.chars().next()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_nth_zero
[INFO] [stdout]    = note: `#[warn(clippy::iter_nth_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this operation has no effect
[INFO] [stdout]   --> src/lib.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |             Pawn(color) => 0 + color.index(),
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^ help: consider reducing it to: `color.index()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stdout]    = note: `#[warn(clippy::identity_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]    --> src/lib.rs:240:12
[INFO] [stdout]     |
[INFO] [stdout] 240 |         if buffer == "" {
[INFO] [stdout]     |            ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `buffer.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]     = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `splits.get(0)`
[INFO] [stdout]    --> src/lib.rs:265:27
[INFO] [stdout]     |
[INFO] [stdout] 265 |         let board: &str = splits.get(0).ok_or("No board state")?;
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: try: `splits.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout]     = note: `#[warn(clippy::get_first)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `rank` is used to index `board`
[INFO] [stdout]    --> src/lib.rs:332:21
[INFO] [stdout]     |
[INFO] [stdout] 332 |         for rank in 0..8 {
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]     = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 332 -         for rank in 0..8 {
[INFO] [stdout] 332 +         for (rank, <item>) in board.iter_mut().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `file` is used to index `board`
[INFO] [stdout]    --> src/lib.rs:333:25
[INFO] [stdout]     |
[INFO] [stdout] 333 |             for file in 0..8 {
[INFO] [stdout]     |                         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 333 -             for file in 0..8 {
[INFO] [stdout] 333 +             for (file, <item>) in board.iter_mut().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/lib.rs:359:17
[INFO] [stdout]     |
[INFO] [stdout] 359 |         assert!(!actual.is_err());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^ help: try: `actual.is_ok()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Bitboard` is never used
[INFO] [stdout]  --> src/lib.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type Bitboard = u64;
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FILES` is never used
[INFO] [stdout]  --> src/lib.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const FILES: [u64; 8] = [
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RANKS` is never used
[INFO] [stdout]   --> src/lib.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const RANKS: [u64; 8] = [
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RANK_MATRIX` is never used
[INFO] [stdout]   --> src/lib.rs:27:7
[INFO] [stdout]    |
[INFO] [stdout] 27 | const RANK_MATRIX: [&str; 8] = ["a", "b", "c", "d", "e", "f", "g", "h"];
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_number_from_str` is never used
[INFO] [stdout]   --> src/lib.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn square_number_from_str(str: &str) -> Option<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]   --> src/lib.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 | enum Color {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `index` is never used
[INFO] [stdout]   --> src/lib.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl Color {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 43 |     fn index(&self) -> usize {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Piece` is never used
[INFO] [stdout]   --> src/lib.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum Piece {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `index`, `fen`, `from_index`, and `from_char` are never used
[INFO] [stdout]    --> src/lib.rs:64:8
[INFO] [stdout]     |
[INFO] [stdout]  63 | impl Piece {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout]  64 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  75 |     pub fn fen(&self) -> String {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |     fn from_index(index: usize) -> Option<Self> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |     fn from_char(char: char) -> Option<Self> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GameState` is never constructed
[INFO] [stdout]    --> src/lib.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 | struct GameState {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_bitboard`, `get_piece_at`, and `get_board_state` are never used
[INFO] [stdout]    --> src/lib.rs:314:12
[INFO] [stdout]     |
[INFO] [stdout] 313 | impl GameState {
[INFO] [stdout]     | -------------- methods in this implementation
[INFO] [stdout] 314 |     pub fn get_bitboard(&self, piece: Piece) -> &Bitboard {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 318 |     pub fn get_piece_at(&self, rank: usize, file: usize) -> Option<Piece> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 330 |     pub fn get_board_state(&self) -> [[Option<Piece>; 8]; 8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `.nth(0)` on a `std::iter::Iterator`, when `.next()` is equivalent
[INFO] [stdout]   --> src/lib.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         str.chars().nth(0)?.to_digit(16)? as u8 - 10 * 8 + str.chars().nth(1)?.to_digit(10)? as u8
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: try calling `.next()` instead of `.nth(0)`: `str.chars().next()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_nth_zero
[INFO] [stdout]    = note: `#[warn(clippy::iter_nth_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this operation has no effect
[INFO] [stdout]   --> src/lib.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |             Pawn(color) => 0 + color.index(),
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^ help: consider reducing it to: `color.index()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stdout]    = note: `#[warn(clippy::identity_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]    --> src/lib.rs:240:12
[INFO] [stdout]     |
[INFO] [stdout] 240 |         if buffer == "" {
[INFO] [stdout]     |            ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `buffer.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]     = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `splits.get(0)`
[INFO] [stdout]    --> src/lib.rs:265:27
[INFO] [stdout]     |
[INFO] [stdout] 265 |         let board: &str = splits.get(0).ok_or("No board state")?;
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: try: `splits.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout]     = note: `#[warn(clippy::get_first)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `rank` is used to index `board`
[INFO] [stdout]    --> src/lib.rs:332:21
[INFO] [stdout]     |
[INFO] [stdout] 332 |         for rank in 0..8 {
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]     = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 332 -         for rank in 0..8 {
[INFO] [stdout] 332 +         for (rank, <item>) in board.iter_mut().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `file` is used to index `board`
[INFO] [stdout]    --> src/lib.rs:333:25
[INFO] [stdout]     |
[INFO] [stdout] 333 |             for file in 0..8 {
[INFO] [stdout]     |                         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 333 -             for file in 0..8 {
[INFO] [stdout] 333 +             for (file, <item>) in board.iter_mut().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "52cc84fd42bd9f235c8af1de33b9abbcd8c3121b158740596a2c755867ca6c95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52cc84fd42bd9f235c8af1de33b9abbcd8c3121b158740596a2c755867ca6c95", kill_on_drop: false }`
[INFO] [stdout] 52cc84fd42bd9f235c8af1de33b9abbcd8c3121b158740596a2c755867ca6c95