[INFO] cloning repository https://github.com/aljce/ribbon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aljce/ribbon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faljce%2Fribbon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faljce%2Fribbon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5282549e19386219759d82c77371ee2cc68824ff
[INFO] testing aljce/ribbon against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faljce%2Fribbon" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aljce/ribbon 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/aljce/ribbon
[INFO] finished tweaking git repo https://github.com/aljce/ribbon
[INFO] tweaked toml for git repo https://github.com/aljce/ribbon written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/aljce/ribbon 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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 3e09720e5d205d0931df40fb56d07467aff76f607075b94034cb6b78a67a305d
[INFO] running `Command { std: "docker" "start" "-a" "3e09720e5d205d0931df40fb56d07467aff76f607075b94034cb6b78a67a305d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e09720e5d205d0931df40fb56d07467aff76f607075b94034cb6b78a67a305d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e09720e5d205d0931df40fb56d07467aff76f607075b94034cb6b78a67a305d", kill_on_drop: false }`
[INFO] [stdout] 3e09720e5d205d0931df40fb56d07467aff76f607075b94034cb6b78a67a305d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] f78b796342bc5862f6088ca82f8fb8eb580fe045572799dab25373ad35cae854
[INFO] running `Command { std: "docker" "start" "-a" "f78b796342bc5862f6088ca82f8fb8eb580fe045572799dab25373ad35cae854", kill_on_drop: false }`
[INFO] [stderr]    Compiling ribbon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `negamax`
[INFO] [stdout]  --> src/search.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn negamax<'a, R: Representation>(board: &'a mut R, depth: usize) -> i8 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "f78b796342bc5862f6088ca82f8fb8eb580fe045572799dab25373ad35cae854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f78b796342bc5862f6088ca82f8fb8eb580fe045572799dab25373ad35cae854", kill_on_drop: false }`
[INFO] [stdout] f78b796342bc5862f6088ca82f8fb8eb580fe045572799dab25373ad35cae854
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 7a12fd4b8b71c9d033b7bc97730a448e08cc0a45089d163d69f383cee77407f3
[INFO] running `Command { std: "docker" "start" "-a" "7a12fd4b8b71c9d033b7bc97730a448e08cc0a45089d163d69f383cee77407f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling ribbon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `negamax`
[INFO] [stdout]  --> src/search.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn negamax<'a, R: Representation>(board: &'a mut R, depth: usize) -> i8 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "7a12fd4b8b71c9d033b7bc97730a448e08cc0a45089d163d69f383cee77407f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a12fd4b8b71c9d033b7bc97730a448e08cc0a45089d163d69f383cee77407f3", kill_on_drop: false }`
[INFO] [stdout] 7a12fd4b8b71c9d033b7bc97730a448e08cc0a45089d163d69f383cee77407f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] f25248d0fb9a2fdc4f765172b42942d2834755725b3df591145ecc8ef6f75bac
[INFO] running `Command { std: "docker" "start" "-a" "f25248d0fb9a2fdc4f765172b42942d2834755725b3df591145ecc8ef6f75bac", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: function is never used: `negamax`
[INFO] [stderr]  --> src/search.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn negamax<'a, R: Representation>(board: &'a mut R, depth: usize) -> i8 {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `ribbon` (bin "ribbon" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ribbon-6cd30c9c1a8e59c5)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test board::tests::perft_unit_1 ... ok
[INFO] [stdout] test board::tests::perft_unit_2 ... ok
[INFO] [stdout] test board::tests::perft_unit_3 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.73s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f25248d0fb9a2fdc4f765172b42942d2834755725b3df591145ecc8ef6f75bac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f25248d0fb9a2fdc4f765172b42942d2834755725b3df591145ecc8ef6f75bac", kill_on_drop: false }`
[INFO] [stdout] f25248d0fb9a2fdc4f765172b42942d2834755725b3df591145ecc8ef6f75bac