[INFO] cloning repository https://github.com/HisenZhang/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HisenZhang/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHisenZhang%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHisenZhang%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eecee563de77bdb74b7e8c7f850b8d4f996b0a06
[INFO] testing HisenZhang/rust-practice against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHisenZhang%2Frust-practice" "/workspace/builds/worker-40/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-40/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HisenZhang/rust-practice on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HisenZhang/rust-practice
[INFO] finished tweaking git repo https://github.com/HisenZhang/rust-practice
[INFO] tweaked toml for git repo https://github.com/HisenZhang/rust-practice written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] crate git repo https://github.com/HisenZhang/rust-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca41f35801af25c38b169c7d549e189e696ac4759f699dcf16989390ec9ee519
[INFO] running `Command { std: "docker" "start" "-a" "ca41f35801af25c38b169c7d549e189e696ac4759f699dcf16989390ec9ee519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca41f35801af25c38b169c7d549e189e696ac4759f699dcf16989390ec9ee519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca41f35801af25c38b169c7d549e189e696ac4759f699dcf16989390ec9ee519", kill_on_drop: false }`
[INFO] [stdout] ca41f35801af25c38b169c7d549e189e696ac4759f699dcf16989390ec9ee519
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f3940147bbbf4cb39646e37a82a09014186f9bf84f931db7e9815651b2ed7ad
[INFO] running `Command { std: "docker" "start" "-a" "7f3940147bbbf4cb39646e37a82a09014186f9bf84f931db7e9815651b2ed7ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling guess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.84s
[INFO] running `Command { std: "docker" "inspect" "7f3940147bbbf4cb39646e37a82a09014186f9bf84f931db7e9815651b2ed7ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f3940147bbbf4cb39646e37a82a09014186f9bf84f931db7e9815651b2ed7ad", kill_on_drop: false }`
[INFO] [stdout] 7f3940147bbbf4cb39646e37a82a09014186f9bf84f931db7e9815651b2ed7ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 929ef5d9275cf1211bc11521f6c70520fc3c92786ffbd1cbb56c8c217ebbe7d2
[INFO] running `Command { std: "docker" "start" "-a" "929ef5d9275cf1211bc11521f6c70520fc3c92786ffbd1cbb56c8c217ebbe7d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling guess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "929ef5d9275cf1211bc11521f6c70520fc3c92786ffbd1cbb56c8c217ebbe7d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "929ef5d9275cf1211bc11521f6c70520fc3c92786ffbd1cbb56c8c217ebbe7d2", kill_on_drop: false }`
[INFO] [stdout] 929ef5d9275cf1211bc11521f6c70520fc3c92786ffbd1cbb56c8c217ebbe7d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0d539387cee74d326087c3d7104c3ef2a774faaca108f576f5038c7d14bbbcb8
[INFO] running `Command { std: "docker" "start" "-a" "0d539387cee74d326087c3d7104c3ef2a774faaca108f576f5038c7d14bbbcb8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/guess-e07a3ee9742d9c25)
[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" "0d539387cee74d326087c3d7104c3ef2a774faaca108f576f5038c7d14bbbcb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d539387cee74d326087c3d7104c3ef2a774faaca108f576f5038c7d14bbbcb8", kill_on_drop: false }`
[INFO] [stdout] 0d539387cee74d326087c3d7104c3ef2a774faaca108f576f5038c7d14bbbcb8