[INFO] cloning repository https://github.com/weirdan/rust-knight-tour
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/weirdan/rust-knight-tour" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweirdan%2Frust-knight-tour", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweirdan%2Frust-knight-tour'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a627aadcf9767a8ab59070953cfc16fbac12bae1
[INFO] testing weirdan/rust-knight-tour against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweirdan%2Frust-knight-tour" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/weirdan/rust-knight-tour 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/weirdan/rust-knight-tour
[INFO] finished tweaking git repo https://github.com/weirdan/rust-knight-tour
[INFO] tweaked toml for git repo https://github.com/weirdan/rust-knight-tour written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/weirdan/rust-knight-tour 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 28d478102553a5256e36c17bc0f895f4679682f967d2144b7b47874f91460c81
[INFO] running `Command { std: "docker" "start" "-a" "28d478102553a5256e36c17bc0f895f4679682f967d2144b7b47874f91460c81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28d478102553a5256e36c17bc0f895f4679682f967d2144b7b47874f91460c81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28d478102553a5256e36c17bc0f895f4679682f967d2144b7b47874f91460c81", kill_on_drop: false }`
[INFO] [stdout] 28d478102553a5256e36c17bc0f895f4679682f967d2144b7b47874f91460c81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 5c1a898e82ec09405e7770b9c21f40e066384773fcfc71ff0d6c95fbe10b0fc0
[INFO] running `Command { std: "docker" "start" "-a" "5c1a898e82ec09405e7770b9c21f40e066384773fcfc71ff0d6c95fbe10b0fc0", kill_on_drop: false }`
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling knights-tour v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "5c1a898e82ec09405e7770b9c21f40e066384773fcfc71ff0d6c95fbe10b0fc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c1a898e82ec09405e7770b9c21f40e066384773fcfc71ff0d6c95fbe10b0fc0", kill_on_drop: false }`
[INFO] [stdout] 5c1a898e82ec09405e7770b9c21f40e066384773fcfc71ff0d6c95fbe10b0fc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 1c51cabc6ceac8cbcfe8456f3bb2641248ca29ffce2c3808f8a4e73b473abdd6
[INFO] running `Command { std: "docker" "start" "-a" "1c51cabc6ceac8cbcfe8456f3bb2641248ca29ffce2c3808f8a4e73b473abdd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling knights-tour v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "1c51cabc6ceac8cbcfe8456f3bb2641248ca29ffce2c3808f8a4e73b473abdd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c51cabc6ceac8cbcfe8456f3bb2641248ca29ffce2c3808f8a4e73b473abdd6", kill_on_drop: false }`
[INFO] [stdout] 1c51cabc6ceac8cbcfe8456f3bb2641248ca29ffce2c3808f8a4e73b473abdd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 3d5872c841cc3d2da382af2d88c85d41261c9f764b8e5326989706546ba5fd20
[INFO] running `Command { std: "docker" "start" "-a" "3d5872c841cc3d2da382af2d88c85d41261c9f764b8e5326989706546ba5fd20", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 5 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/knights_tour-884c829a100d2480)
[INFO] [stdout] test tests::knight_cannot_tour_on_3x3_board ... ok
[INFO] [stdout] test tests::knight_in_top_left_corner_has_2_moves ... ok
[INFO] [stdout] test tests::knight_has_8_moves ... ok
[INFO] [stdout] test tests::knight_ignores_moves_to_visited_squares ... ok
[INFO] [stdout] test tests::knight_can_tour_on_6x6_board ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3d5872c841cc3d2da382af2d88c85d41261c9f764b8e5326989706546ba5fd20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d5872c841cc3d2da382af2d88c85d41261c9f764b8e5326989706546ba5fd20", kill_on_drop: false }`
[INFO] [stdout] 3d5872c841cc3d2da382af2d88c85d41261c9f764b8e5326989706546ba5fd20