[INFO] cloning repository https://github.com/DerLando/board-repr-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DerLando/board-repr-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDerLando%2Fboard-repr-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDerLando%2Fboard-repr-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29fdbe0ca70a740109d3184139b45a2e777daf72
[INFO] testing DerLando/board-repr-rs against 1.69.0 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDerLando%2Fboard-repr-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DerLando/board-repr-rs on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DerLando/board-repr-rs
[INFO] finished tweaking git repo https://github.com/DerLando/board-repr-rs
[INFO] tweaked toml for git repo https://github.com/DerLando/board-repr-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/DerLando/board-repr-rs 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] badbe06286de8004ba5ae62a448870c2dbb2a39a06dddc23ea683dcb009b7fa1
[INFO] running `Command { std: "docker" "start" "-a" "badbe06286de8004ba5ae62a448870c2dbb2a39a06dddc23ea683dcb009b7fa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "badbe06286de8004ba5ae62a448870c2dbb2a39a06dddc23ea683dcb009b7fa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "badbe06286de8004ba5ae62a448870c2dbb2a39a06dddc23ea683dcb009b7fa1", kill_on_drop: false }`
[INFO] [stdout] badbe06286de8004ba5ae62a448870c2dbb2a39a06dddc23ea683dcb009b7fa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7b3eab01e42847764685d29a89d97672098e4089cf003961a2513afa993e806
[INFO] running `Command { std: "docker" "start" "-a" "e7b3eab01e42847764685d29a89d97672098e4089cf003961a2513afa993e806", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]    Compiling board-repr-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> src/err/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::char::ParseCharError`
[INFO] [stdout]  --> src/err/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::char::ParseCharError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] [stdout] warning: variants `InvalidRow`, `InvalidCol`, and `InvalidLength` are never constructed
[INFO] [stdout]   --> src/err/mod.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub(crate) enum PositionParseError {
[INFO] [stdout]    |                 ------------------ variants in this enum
[INFO] [stdout] 8  |     InvalidRow(char),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 9  |     InvalidCol(char),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     InvalidLength(usize)
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PositionParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `VALID_ROWS` is never used
[INFO] [stdout]   --> src/position.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 |     const VALID_ROWS: [char; 8] = ['1', '2', '3', '4', '5', '6', '7', '8'];
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `VALID_COLS` is never used
[INFO] [stdout]   --> src/position.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 |     const VALID_COLS: [char; 8] = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse` is never used
[INFO] [stdout]   --> src/position.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn parse(position: &str) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse_row` is never used
[INFO] [stdout]   --> src/position.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn parse_row(char: &char) -> Result<u8, PositionParseError> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse_col` is never used
[INFO] [stdout]   --> src/position.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn parse_col(char: &char) -> Result<u8, PositionParseError> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/position.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SquareBoard8x8` is never constructed
[INFO] [stdout]  --> src/boards/squareboard_8x8.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SquareBoard8x8 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/boards/squareboard_8x8.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `position_to_index` is never used
[INFO] [stdout]   --> src/boards/squareboard_8x8.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn position_to_index(position: &Position) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `square` is never used
[INFO] [stdout]   --> src/boards/squareboard_8x8.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn square(&self, position: impl Into<Position>) -> &Option<Piece> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/piece.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub(crate) enum Piece {
[INFO] [stdout]    |                 ----- variants in this enum
[INFO] [stdout] 3  |     WhitePawn,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 4  |     WhiteRook,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 5  |     WhiteKnight,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 6  |     WhiteBishop,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 7  |     WhiteQueen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     WhiteKing,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 9  |     BlackPawn,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 10 |     BlackRook,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 11 |     BlackKnight,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 12 |     BlackBishop,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 13 |     BlackQueen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     BlackKing,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Piece` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e7b3eab01e42847764685d29a89d97672098e4089cf003961a2513afa993e806", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7b3eab01e42847764685d29a89d97672098e4089cf003961a2513afa993e806", kill_on_drop: false }`
[INFO] [stdout] e7b3eab01e42847764685d29a89d97672098e4089cf003961a2513afa993e806
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcc0a0d8f39c6a81b6c66c69d478947559f7d7214436e6d2a33f6b31f35c62eb
[INFO] running `Command { std: "docker" "start" "-a" "bcc0a0d8f39c6a81b6c66c69d478947559f7d7214436e6d2a33f6b31f35c62eb", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> src/err/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling board-repr-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::char::ParseCharError`
[INFO] [stdout]  --> src/err/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::char::ParseCharError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InvalidRow`, `InvalidCol`, and `InvalidLength` are never constructed
[INFO] [stdout]   --> src/err/mod.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub(crate) enum PositionParseError {
[INFO] [stdout]    |                 ------------------ variants in this enum
[INFO] [stdout] 8  |     InvalidRow(char),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 9  |     InvalidCol(char),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     InvalidLength(usize)
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PositionParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `VALID_ROWS` is never used
[INFO] [stdout]   --> src/position.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 |     const VALID_ROWS: [char; 8] = ['1', '2', '3', '4', '5', '6', '7', '8'];
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `VALID_COLS` is never used
[INFO] [stdout]   --> src/position.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 |     const VALID_COLS: [char; 8] = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse` is never used
[INFO] [stdout]   --> src/position.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn parse(position: &str) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse_row` is never used
[INFO] [stdout]   --> src/position.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn parse_row(char: &char) -> Result<u8, PositionParseError> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse_col` is never used
[INFO] [stdout]   --> src/position.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn parse_col(char: &char) -> Result<u8, PositionParseError> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/position.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SquareBoard8x8` is never constructed
[INFO] [stdout]  --> src/boards/squareboard_8x8.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SquareBoard8x8 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/boards/squareboard_8x8.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `position_to_index` is never used
[INFO] [stdout]   --> src/boards/squareboard_8x8.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn position_to_index(position: &Position) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `square` is never used
[INFO] [stdout]   --> src/boards/squareboard_8x8.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn square(&self, position: impl Into<Position>) -> &Option<Piece> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/piece.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub(crate) enum Piece {
[INFO] [stdout]    |                 ----- variants in this enum
[INFO] [stdout] 3  |     WhitePawn,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 4  |     WhiteRook,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 5  |     WhiteKnight,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 6  |     WhiteBishop,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 7  |     WhiteQueen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     WhiteKing,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 9  |     BlackPawn,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 10 |     BlackRook,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 11 |     BlackKnight,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 12 |     BlackBishop,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 13 |     BlackQueen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     BlackKing,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Piece` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> src/err/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `board-repr-rs`; 3 warnings emitted
[INFO] [stdout] warning: unused import: `std::char::ParseCharError`
[INFO] [stdout]  --> src/err/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::char::ParseCharError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `InvalidLength` is never constructed
[INFO] [stdout]   --> src/err/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub(crate) enum PositionParseError {
[INFO] [stdout]    |                 ------------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     InvalidLength(usize)
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PositionParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bcc0a0d8f39c6a81b6c66c69d478947559f7d7214436e6d2a33f6b31f35c62eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcc0a0d8f39c6a81b6c66c69d478947559f7d7214436e6d2a33f6b31f35c62eb", kill_on_drop: false }`
[INFO] [stdout] bcc0a0d8f39c6a81b6c66c69d478947559f7d7214436e6d2a33f6b31f35c62eb