[INFO] cloning repository https://github.com/carllhw/tokio-hello-world
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/carllhw/tokio-hello-world" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarllhw%2Ftokio-hello-world", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarllhw%2Ftokio-hello-world'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1e7928e2d09fe1311bd31d5b62b28115e4b263f
[INFO] testing carllhw/tokio-hello-world against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarllhw%2Ftokio-hello-world" "/workspace/builds/worker-46/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-46/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/carllhw/tokio-hello-world 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/carllhw/tokio-hello-world
[INFO] finished tweaking git repo https://github.com/carllhw/tokio-hello-world
[INFO] tweaked toml for git repo https://github.com/carllhw/tokio-hello-world written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] crate git repo https://github.com/carllhw/tokio-hello-world 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-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] f43b8e0b392288439a436ac5c9a5723ed3fe27fb511799335c19656160ba7b5e
[INFO] running `Command { std: "docker" "start" "-a" "f43b8e0b392288439a436ac5c9a5723ed3fe27fb511799335c19656160ba7b5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f43b8e0b392288439a436ac5c9a5723ed3fe27fb511799335c19656160ba7b5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f43b8e0b392288439a436ac5c9a5723ed3fe27fb511799335c19656160ba7b5e", kill_on_drop: false }`
[INFO] [stdout] f43b8e0b392288439a436ac5c9a5723ed3fe27fb511799335c19656160ba7b5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] ac95e0010508a1f4321efed1a1b6116fa656e2de2c5478b6e39bb84093562590
[INFO] running `Command { std: "docker" "start" "-a" "ac95e0010508a1f4321efed1a1b6116fa656e2de2c5478b6e39bb84093562590", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling futures v0.1.23
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling byteorder v1.2.4
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling lazycell v0.6.0
[INFO] [stderr]    Compiling slab v0.4.1
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling bytes v0.4.9
[INFO] [stderr]    Compiling mio v0.6.15
[INFO] [stderr]    Compiling tokio-executor v0.1.3
[INFO] [stderr]    Compiling tokio-timer v0.2.5
[INFO] [stderr]    Compiling tokio-io v0.1.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.3
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.3
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.5
[INFO] [stderr]    Compiling tokio-udp v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.1
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.6
[INFO] [stderr]    Compiling tokio-hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `tokio::io`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::io;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 11.41s
[INFO] running `Command { std: "docker" "inspect" "ac95e0010508a1f4321efed1a1b6116fa656e2de2c5478b6e39bb84093562590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac95e0010508a1f4321efed1a1b6116fa656e2de2c5478b6e39bb84093562590", kill_on_drop: false }`
[INFO] [stdout] ac95e0010508a1f4321efed1a1b6116fa656e2de2c5478b6e39bb84093562590
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 96baa9a96c6dc5568ffb695c3821c8b50793c39c839cd2db14e1b5c4d1e77df7
[INFO] running `Command { std: "docker" "start" "-a" "96baa9a96c6dc5568ffb695c3821c8b50793c39c839cd2db14e1b5c4d1e77df7", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio-hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `tokio::io`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::io;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 1.31s
[INFO] running `Command { std: "docker" "inspect" "96baa9a96c6dc5568ffb695c3821c8b50793c39c839cd2db14e1b5c4d1e77df7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96baa9a96c6dc5568ffb695c3821c8b50793c39c839cd2db14e1b5c4d1e77df7", kill_on_drop: false }`
[INFO] [stdout] 96baa9a96c6dc5568ffb695c3821c8b50793c39c839cd2db14e1b5c4d1e77df7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 15b2357fa37fcfb5547f02945f3ce54135199833f23b387508eebd768f88b8ff
[INFO] running `Command { std: "docker" "start" "-a" "15b2357fa37fcfb5547f02945f3ce54135199833f23b387508eebd768f88b8ff", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `tokio::io`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use tokio::io;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio-hello-world` (bin "tokio-hello-world" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tokio_hello_world-c522603277309000)
[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" "15b2357fa37fcfb5547f02945f3ce54135199833f23b387508eebd768f88b8ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15b2357fa37fcfb5547f02945f3ce54135199833f23b387508eebd768f88b8ff", kill_on_drop: false }`
[INFO] [stdout] 15b2357fa37fcfb5547f02945f3ce54135199833f23b387508eebd768f88b8ff