[INFO] cloning repository https://github.com/nkoppel/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/nkoppel/chess_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkoppel%2Fchess_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkoppel%2Fchess_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4cc4ab6a7a1e6fdf4c3ab3935dc4292ecf17f793
[INFO] testing nkoppel/chess_engine against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnkoppel%2Fchess_engine" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nkoppel/chess_engine on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nkoppel/chess_engine
[INFO] finished tweaking git repo https://github.com/nkoppel/chess_engine
[INFO] tweaked toml for git repo https://github.com/nkoppel/chess_engine written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/nkoppel/chess_engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ff193d0d6d537b199ba10f7c75deb8efd1782087908004be77ae882daa8101a
[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" "7ff193d0d6d537b199ba10f7c75deb8efd1782087908004be77ae882daa8101a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ff193d0d6d537b199ba10f7c75deb8efd1782087908004be77ae882daa8101a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ff193d0d6d537b199ba10f7c75deb8efd1782087908004be77ae882daa8101a", kill_on_drop: false }`
[INFO] [stdout] 7ff193d0d6d537b199ba10f7c75deb8efd1782087908004be77ae882daa8101a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ccbc007f92434ab8ef24d2db702c8c69f4e5e68728d1abc7702a324bb13a875
[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" "2ccbc007f92434ab8ef24d2db702c8c69f4e5e68728d1abc7702a324bb13a875", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling chess_engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::gen_table::print_board`
[INFO] [stdout]  --> src/board.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::gen_table::print_board;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:114:19
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let all = (self.curr | self.other);
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/board.rs:281:22
[INFO] [stdout]     |
[INFO] [stdout] 281 |             for x in (0..8) {
[INFO] [stdout]     |                      ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/board.rs:288:22
[INFO] [stdout]     |
[INFO] [stdout] 288 |             for x in (0..8) {
[INFO] [stdout]     |                      ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/board.rs:314:22
[INFO] [stdout]     |
[INFO] [stdout] 314 |             for x in (0..8) {
[INFO] [stdout]     |                      ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:382:27
[INFO] [stdout]     |
[INFO] [stdout] 382 |                 let pos = (x + y * 8);
[INFO] [stdout]     |                           ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `En_passant` should have an upper camel case name
[INFO] [stdout]  --> src/movegen.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     En_passant(u8, u8),
[INFO] [stdout]   |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `EnPassant`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Castle_king` should have an upper camel case name
[INFO] [stdout]  --> src/movegen.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Castle_king,
[INFO] [stdout]   |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `CastleKing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Castle_queen` should have an upper camel case name
[INFO] [stdout]  --> src/movegen.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Castle_queen,
[INFO] [stdout]   |     ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `CastleQueen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Piece::*`, `Piece`
[INFO] [stdout]  --> src/position.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::board::{Board, Piece, Piece::*};
[INFO] [stdout]   |                           ^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LocStack`, `new_tables`, `print_board`
[INFO] [stdout]  --> src/position.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::gen_table::{LocStack, Tables, new_tables, print_board};
[INFO] [stdout]   |                        ^^^^^^^^          ^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Moves`
[INFO] [stdout]  --> src/search.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::movegen::{Moves, Move, Move::*};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::board::Board`
[INFO] [stdout]  --> src/search.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::board::Board;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]    --> src/search.rs:261:17
[INFO] [stdout]     |
[INFO] [stdout] 261 | use std::time::{Duration, SystemTime};
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/search.rs:268:23
[INFO] [stdout]     |
[INFO] [stdout] 268 |     let mut score = 0;;
[INFO] [stdout]     |                       ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `print_board`
[INFO] [stdout]  --> src/eval.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::gen_table::{print_board, LocStack};
[INFO] [stdout]   |                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Board`, `Piece::*`, `Piece`
[INFO] [stdout]   --> src/main.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::board::{Board, Piece, Piece::*};
[INFO] [stdout]    |                    ^^^^^  ^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Move::*`
[INFO] [stdout]   --> src/main.rs:16:25
[INFO] [stdout]    |
[INFO] [stdout] 16 | use crate::movegen::{*, Move::*};
[INFO] [stdout]    |                         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]    --> src/main.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     use test::Bencher;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chess_engine`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2ccbc007f92434ab8ef24d2db702c8c69f4e5e68728d1abc7702a324bb13a875", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ccbc007f92434ab8ef24d2db702c8c69f4e5e68728d1abc7702a324bb13a875", kill_on_drop: false }`
[INFO] [stdout] 2ccbc007f92434ab8ef24d2db702c8c69f4e5e68728d1abc7702a324bb13a875