[INFO] cloning repository https://github.com/starqi/chess-bs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/starqi/chess-bs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstarqi%2Fchess-bs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstarqi%2Fchess-bs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68026c8f5b4c3172e075c58ccea7b9ecb7e708bf
[INFO] checking starqi/chess-bs against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstarqi%2Fchess-bs" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/starqi/chess-bs on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/starqi/chess-bs
[INFO] finished tweaking git repo https://github.com/starqi/chess-bs
[INFO] tweaked toml for git repo https://github.com/starqi/chess-bs written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/starqi/chess-bs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0b3ea502ca417f651a655665bfdd65a1a65cfe2c6cf0815f6136ce54c9316008
[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" "0b3ea502ca417f651a655665bfdd65a1a65cfe2c6cf0815f6136ce54c9316008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b3ea502ca417f651a655665bfdd65a1a65cfe2c6cf0815f6136ce54c9316008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b3ea502ca417f651a655665bfdd65a1a65cfe2c6cf0815f6136ce54c9316008", kill_on_drop: false }`
[INFO] [stdout] 0b3ea502ca417f651a655665bfdd65a1a65cfe2c6cf0815f6136ce54c9316008
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6d56334816e3650554a329dbc2434b57abbf19990ef77187beeb8743686101a
[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" "d6d56334816e3650554a329dbc2434b57abbf19990ef77187beeb8743686101a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking chess2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Piece`, `Player`, `Square`
[INFO] [stdout]  --> src/main.rs:4:64
[INFO] [stdout]   |
[INFO] [stdout] 4 | use board::{make_check_threat_temp_bufs, xy_to_file_rank_safe, Player, Board, Square, Piece, MoveList};
[INFO] [stdout]   |                                                                ^^^^^^         ^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Piece`, `Player`, `Square`
[INFO] [stdout]  --> src/main.rs:4:64
[INFO] [stdout]   |
[INFO] [stdout] 4 | use board::{make_check_threat_temp_bufs, xy_to_file_rank_safe, Player, Board, Square, Piece, MoveList};
[INFO] [stdout]   |                                                                ^^^^^^         ^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp_move_list`
[INFO] [stdout]    --> src/board.rs:456:65
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn make_move(&self, moves: &mut MoveList, index: usize, temp_move_list: &mut Vec<(u8, u8)>) -> Result<(), Error> {
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_move_list`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp_move_list`
[INFO] [stdout]    --> src/board.rs:456:65
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn make_move(&self, moves: &mut MoveList, index: usize, temp_move_list: &mut Vec<(u8, u8)>) -> Result<(), Error> {
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_move_list`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Pawn`
[INFO] [stdout]   --> src/board.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Pawn, Rook, Knight, Bishop, Queen, King
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/board.rs:421:12
[INFO] [stdout]     |
[INFO] [stdout] 421 |     pub fn get(&self, file: char, rank: u8) -> Result<Square, Error> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/board.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     if x < 0 || x > 7 || y < 0 || y > 7 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/board.rs:14:26
[INFO] [stdout]    |
[INFO] [stdout] 14 |     if x < 0 || x > 7 || y < 0 || y > 7 {
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Pawn`
[INFO] [stdout]   --> src/board.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Pawn, Rook, Knight, Bishop, Queen, King
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/board.rs:421:12
[INFO] [stdout]     |
[INFO] [stdout] 421 |     pub fn get(&self, file: char, rank: u8) -> Result<Square, Error> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/board.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     if x < 0 || x > 7 || y < 0 || y > 7 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/board.rs:14:26
[INFO] [stdout]    |
[INFO] [stdout] 14 |     if x < 0 || x > 7 || y < 0 || y > 7 {
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/board.rs:386:9
[INFO] [stdout]     |
[INFO] [stdout] 386 |         write!(f, "{}", self.data.borrow());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/board.rs:386:9
[INFO] [stdout]     |
[INFO] [stdout] 386 |         write!(f, "{}", self.data.borrow());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.67s
[INFO] running `Command { std: "docker" "inspect" "d6d56334816e3650554a329dbc2434b57abbf19990ef77187beeb8743686101a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6d56334816e3650554a329dbc2434b57abbf19990ef77187beeb8743686101a", kill_on_drop: false }`
[INFO] [stdout] d6d56334816e3650554a329dbc2434b57abbf19990ef77187beeb8743686101a