[INFO] cloning repository https://github.com/arkadiusz-gorecki/eight-queens-backtracking
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arkadiusz-gorecki/eight-queens-backtracking" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farkadiusz-gorecki%2Feight-queens-backtracking", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farkadiusz-gorecki%2Feight-queens-backtracking'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ecd7c1ec6a31483d59b83286fec66aa559c7c6e
[INFO] testing arkadiusz-gorecki/eight-queens-backtracking against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farkadiusz-gorecki%2Feight-queens-backtracking" "/workspace/builds/worker-113/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-113/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  42% (3/7)
Updating files:  57% (4/7)
Updating files:  71% (5/7)
Updating files:  85% (6/7)
Updating files: 100% (7/7)
Updating files: 100% (7/7), done.
[INFO] validating manifest of git repo https://github.com/arkadiusz-gorecki/eight-queens-backtracking 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/arkadiusz-gorecki/eight-queens-backtracking
[INFO] finished tweaking git repo https://github.com/arkadiusz-gorecki/eight-queens-backtracking
[INFO] tweaked toml for git repo https://github.com/arkadiusz-gorecki/eight-queens-backtracking written to /workspace/builds/worker-113/source/Cargo.toml
[INFO] crate git repo https://github.com/arkadiusz-gorecki/eight-queens-backtracking 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-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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] c5fc186bf08521090019488f73f3599de421c34922f2abf1fed5ab78cec8d197
[INFO] running `Command { std: "docker" "start" "-a" "c5fc186bf08521090019488f73f3599de421c34922f2abf1fed5ab78cec8d197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5fc186bf08521090019488f73f3599de421c34922f2abf1fed5ab78cec8d197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5fc186bf08521090019488f73f3599de421c34922f2abf1fed5ab78cec8d197", kill_on_drop: false }`
[INFO] [stdout] c5fc186bf08521090019488f73f3599de421c34922f2abf1fed5ab78cec8d197
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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] 0155729daf5f1c653ee86b32754f0c52c9dfd6b7abea254960aa330a98f970d2
[INFO] running `Command { std: "docker" "start" "-a" "0155729daf5f1c653ee86b32754f0c52c9dfd6b7abea254960aa330a98f970d2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling backtracking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.98s
[INFO] running `Command { std: "docker" "inspect" "0155729daf5f1c653ee86b32754f0c52c9dfd6b7abea254960aa330a98f970d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0155729daf5f1c653ee86b32754f0c52c9dfd6b7abea254960aa330a98f970d2", kill_on_drop: false }`
[INFO] [stdout] 0155729daf5f1c653ee86b32754f0c52c9dfd6b7abea254960aa330a98f970d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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] d2f2ce465ae1f9d5c174a766294f352446e188c47ad40d3666d5f4986f7e9672
[INFO] running `Command { std: "docker" "start" "-a" "d2f2ce465ae1f9d5c174a766294f352446e188c47ad40d3666d5f4986f7e9672", kill_on_drop: false }`
[INFO] [stderr]    Compiling backtracking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "d2f2ce465ae1f9d5c174a766294f352446e188c47ad40d3666d5f4986f7e9672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f2ce465ae1f9d5c174a766294f352446e188c47ad40d3666d5f4986f7e9672", kill_on_drop: false }`
[INFO] [stdout] d2f2ce465ae1f9d5c174a766294f352446e188c47ad40d3666d5f4986f7e9672
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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] 27acde83255c30ec1914be29e2ee6bd28ac07abb3d1808ddfba6c6a9c259cbe2
[INFO] running `Command { std: "docker" "start" "-a" "27acde83255c30ec1914be29e2ee6bd28ac07abb3d1808ddfba6c6a9c259cbe2", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/backtracking-7a61de4b1c6a517c)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::backtracking_time ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/backtracking-906df4a83a0b3f75)
[INFO] [stdout] test tests::bruteforce_time ... ok
[INFO] [stderr]    Doc-tests backtracking
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 10.49s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "27acde83255c30ec1914be29e2ee6bd28ac07abb3d1808ddfba6c6a9c259cbe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27acde83255c30ec1914be29e2ee6bd28ac07abb3d1808ddfba6c6a9c259cbe2", kill_on_drop: false }`
[INFO] [stdout] 27acde83255c30ec1914be29e2ee6bd28ac07abb3d1808ddfba6c6a9c259cbe2