[INFO] cloning repository https://github.com/dennis-roof/queens-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dennis-roof/queens-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdennis-roof%2Fqueens-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdennis-roof%2Fqueens-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6aa16fa8e374e50c05bda39a89424359241da6b
[INFO] testing dennis-roof/queens-rust against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdennis-roof%2Fqueens-rust" "/workspace/builds/worker-20/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-20/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dennis-roof/queens-rust on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dennis-roof/queens-rust
[INFO] finished tweaking git repo https://github.com/dennis-roof/queens-rust
[INFO] tweaked toml for git repo https://github.com/dennis-roof/queens-rust written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate git repo https://github.com/dennis-roof/queens-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5188f18fc7da7c3fc43ae80141cc5911ed26dfd4e574a0109f4bdef019194809
[INFO] running `Command { std: "docker" "start" "-a" "5188f18fc7da7c3fc43ae80141cc5911ed26dfd4e574a0109f4bdef019194809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5188f18fc7da7c3fc43ae80141cc5911ed26dfd4e574a0109f4bdef019194809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5188f18fc7da7c3fc43ae80141cc5911ed26dfd4e574a0109f4bdef019194809", kill_on_drop: false }`
[INFO] [stdout] 5188f18fc7da7c3fc43ae80141cc5911ed26dfd4e574a0109f4bdef019194809
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 233a964b21b880bcafee7038aad31c1e53a45e62a12e5a0d5f641b3479ae8950
[INFO] running `Command { std: "docker" "start" "-a" "233a964b21b880bcafee7038aad31c1e53a45e62a12e5a0d5f641b3479ae8950", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling queens-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/queens_solver/board.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |     (Position {x: 99, y: 99})
[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 block return value
[INFO] [stdout]   --> src/queens_solver/board.rs:58:2
[INFO] [stdout]    |
[INFO] [stdout] 58 |     (x_diff.abs() == y_diff.abs())
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/queens_solver/board.rs:63:2
[INFO] [stdout]    |
[INFO] [stdout] 63 |     (position.x != 99 && position.y != 99)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/queens_solver/mod.rs:25:2
[INFO] [stdout]    |
[INFO] [stdout] 25 |     (number_of_queen_pieces == board_size)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.65s
[INFO] running `Command { std: "docker" "inspect" "233a964b21b880bcafee7038aad31c1e53a45e62a12e5a0d5f641b3479ae8950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "233a964b21b880bcafee7038aad31c1e53a45e62a12e5a0d5f641b3479ae8950", kill_on_drop: false }`
[INFO] [stdout] 233a964b21b880bcafee7038aad31c1e53a45e62a12e5a0d5f641b3479ae8950
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d3b7f67ae59e00fad5a6d7126b8993f2e043f5a5cd8fea2040c9e8837d9851e2
[INFO] running `Command { std: "docker" "start" "-a" "d3b7f67ae59e00fad5a6d7126b8993f2e043f5a5cd8fea2040c9e8837d9851e2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling queens-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/queens_solver/board.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |     (Position {x: 99, y: 99})
[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 block return value
[INFO] [stdout]   --> src/queens_solver/board.rs:58:2
[INFO] [stdout]    |
[INFO] [stdout] 58 |     (x_diff.abs() == y_diff.abs())
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/queens_solver/board.rs:63:2
[INFO] [stdout]    |
[INFO] [stdout] 63 |     (position.x != 99 && position.y != 99)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/queens_solver/mod.rs:25:2
[INFO] [stdout]    |
[INFO] [stdout] 25 |     (number_of_queen_pieces == board_size)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "d3b7f67ae59e00fad5a6d7126b8993f2e043f5a5cd8fea2040c9e8837d9851e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3b7f67ae59e00fad5a6d7126b8993f2e043f5a5cd8fea2040c9e8837d9851e2", kill_on_drop: false }`
[INFO] [stdout] d3b7f67ae59e00fad5a6d7126b8993f2e043f5a5cd8fea2040c9e8837d9851e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 81ee30cfedbf536d452f7271d904c585ebfdcda84ff1694e7afee3f4f4d6d3ca
[INFO] running `Command { std: "docker" "start" "-a" "81ee30cfedbf536d452f7271d904c585ebfdcda84ff1694e7afee3f4f4d6d3ca", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/queens_solver/board.rs:51:2
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 51 |     (Position {x: 99, y: 99})
[INFO] [stdout] 
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/queens_solver/board.rs:58:2
[INFO] [stderr]    |
[INFO] [stderr] 58 |     (x_diff.abs() == y_diff.abs())
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/queens_solver/board.rs:63:2
[INFO] [stderr]    |
[INFO] [stderr] 63 |     (position.x != 99 && position.y != 99)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/queens_solver/mod.rs:25:2
[INFO] [stderr]    |
[INFO] [stderr] 25 |     (number_of_queen_pieces == board_size)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: `queens-rust` (bin "queens-rust" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/queens_rust-be52a8c6c40eb7fe)
[INFO] running `Command { std: "docker" "inspect" "81ee30cfedbf536d452f7271d904c585ebfdcda84ff1694e7afee3f4f4d6d3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81ee30cfedbf536d452f7271d904c585ebfdcda84ff1694e7afee3f4f4d6d3ca", kill_on_drop: false }`
[INFO] [stdout] 81ee30cfedbf536d452f7271d904c585ebfdcda84ff1694e7afee3f4f4d6d3ca