[INFO] updating cached repository https://github.com/krixon/knights-tour-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cc5756bff781871a102a765ec74a3ea0f5bc3b6
[INFO] testing krixon/knights-tour-rs against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrixon%2Fknights-tour-rs" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/krixon/knights-tour-rs on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/krixon/knights-tour-rs
[INFO] finished tweaking git repo https://github.com/krixon/knights-tour-rs
[INFO] tweaked toml for git repo https://github.com/krixon/knights-tour-rs written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/krixon/knights-tour-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e1db7f9f939d72061b709f74b8576e3e360329a8ef3f35f48d0a620d50221a5
[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" "1e1db7f9f939d72061b709f74b8576e3e360329a8ef3f35f48d0a620d50221a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e1db7f9f939d72061b709f74b8576e3e360329a8ef3f35f48d0a620d50221a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e1db7f9f939d72061b709f74b8576e3e360329a8ef3f35f48d0a620d50221a5", kill_on_drop: false }`
[INFO] [stdout] 1e1db7f9f939d72061b709f74b8576e3e360329a8ef3f35f48d0a620d50221a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad1a014a24fb3625bf0116254c1222c00e7934f044b1e738912fe1aa6f11463d
[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" "ad1a014a24fb3625bf0116254c1222c00e7934f044b1e738912fe1aa6f11463d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.16
[INFO] [stderr]    Compiling rand v0.3.14
[INFO] [stderr]    Compiling knights_tour v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.39s
[INFO] running `Command { std: "docker" "inspect" "ad1a014a24fb3625bf0116254c1222c00e7934f044b1e738912fe1aa6f11463d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad1a014a24fb3625bf0116254c1222c00e7934f044b1e738912fe1aa6f11463d", kill_on_drop: false }`
[INFO] [stdout] ad1a014a24fb3625bf0116254c1222c00e7934f044b1e738912fe1aa6f11463d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f54102dab8b35764adb4cb56c04ac8dd378118ec492dfc7c4c5b9bafe6a97dfa
[INFO] running `Command { std: "docker" "start" "-a" "f54102dab8b35764adb4cb56c04ac8dd378118ec492dfc7c4c5b9bafe6a97dfa", kill_on_drop: false }`
[INFO] [stderr]    Compiling knights_tour v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "f54102dab8b35764adb4cb56c04ac8dd378118ec492dfc7c4c5b9bafe6a97dfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f54102dab8b35764adb4cb56c04ac8dd378118ec492dfc7c4c5b9bafe6a97dfa", kill_on_drop: false }`
[INFO] [stdout] f54102dab8b35764adb4cb56c04ac8dd378118ec492dfc7c4c5b9bafe6a97dfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cfff1802717cb239e0d027083472b8b185ced667d0b2571573e42c2dd759fd3a
[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" "cfff1802717cb239e0d027083472b8b185ced667d0b2571573e42c2dd759fd3a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/knights_tour-484d4f6b336cbd9d
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cfff1802717cb239e0d027083472b8b185ced667d0b2571573e42c2dd759fd3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfff1802717cb239e0d027083472b8b185ced667d0b2571573e42c2dd759fd3a", kill_on_drop: false }`
[INFO] [stdout] cfff1802717cb239e0d027083472b8b185ced667d0b2571573e42c2dd759fd3a