[INFO] cloning repository https://github.com/tomtien/chess-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomtien/chess-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomtien%2Fchess-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomtien%2Fchess-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 127ac629f8033433ad59cec8aca2b57f7d246ae6
[INFO] checking tomtien/chess-engine against try#df1b9bf194c9183fb7c0604484171064069ce232 for pr-149195-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomtien%2Fchess-engine" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tomtien/chess-engine
[INFO] finished tweaking git repo https://github.com/tomtien/chess-engine
[INFO] tweaked toml for git repo https://github.com/tomtien/chess-engine written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tomtien/chess-engine on toolchain df1b9bf194c9183fb7c0604484171064069ce232
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tomtien/chess-engine 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" "+df1b9bf194c9183fb7c0604484171064069ce232" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a157a550f878c559ee5438975e86b3b7737532eeb071adaf7d85970b8c10ec8
[INFO] running `Command { std: "docker" "start" "-a" "8a157a550f878c559ee5438975e86b3b7737532eeb071adaf7d85970b8c10ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a157a550f878c559ee5438975e86b3b7737532eeb071adaf7d85970b8c10ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a157a550f878c559ee5438975e86b3b7737532eeb071adaf7d85970b8c10ec8", kill_on_drop: false }`
[INFO] [stdout] 8a157a550f878c559ee5438975e86b3b7737532eeb071adaf7d85970b8c10ec8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af0395b8ccf23fc12becffacb55b525ea69e37ed3ff139abd19e0c0ffc6a2ad1
[INFO] running `Command { std: "docker" "start" "-a" "af0395b8ccf23fc12becffacb55b525ea69e37ed3ff139abd19e0c0ffc6a2ad1", kill_on_drop: false }`
[INFO] [stderr]     Checking chess-engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Display` and `self`
[INFO] [stdout]  --> src/chess/chess_color.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{self, Display};
[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: `super::InvalidNotationError`
[INFO] [stdout]  --> src/chess/chess_color.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::InvalidNotationError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `self`
[INFO] [stdout]  --> src/chess/chess_color.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{self, Display};
[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: `super::InvalidNotationError`
[INFO] [stdout]  --> src/chess/chess_color.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::InvalidNotationError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHESS_COLORS` is never used
[INFO] [stdout]   --> src/chess/mod.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const CHESS_COLORS: usize = 2;
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chess/chess_board.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl ChessBoard {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 57 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_idx` is never used
[INFO] [stdout]   --> src/chess/chess_color.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl ChessColor {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 15 |     #[inline(always)]
[INFO] [stdout] 16 |     pub fn get_idx(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHESS_COLORS` is never used
[INFO] [stdout]   --> src/chess/mod.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const CHESS_COLORS: usize = 2;
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chess/chess_board.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl ChessBoard {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 57 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_idx` is never used
[INFO] [stdout]   --> src/chess/chess_color.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl ChessColor {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 15 |     #[inline(always)]
[INFO] [stdout] 16 |     pub fn get_idx(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "af0395b8ccf23fc12becffacb55b525ea69e37ed3ff139abd19e0c0ffc6a2ad1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af0395b8ccf23fc12becffacb55b525ea69e37ed3ff139abd19e0c0ffc6a2ad1", kill_on_drop: false }`
[INFO] [stdout] af0395b8ccf23fc12becffacb55b525ea69e37ed3ff139abd19e0c0ffc6a2ad1