[INFO] updating cached repository carllhw/tokio-hello-world
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/carllhw/tokio-hello-world
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/carllhw/tokio-hello-world" "work/ex/beta-1.37-6/sources/1.36.0/gh/carllhw/tokio-hello-world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/carllhw/tokio-hello-world'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/carllhw/tokio-hello-world" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carllhw/tokio-hello-world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carllhw/tokio-hello-world'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f1e7928e2d09fe1311bd31d5b62b28115e4b263f
[INFO] sha for GitHub repo carllhw/tokio-hello-world: f1e7928e2d09fe1311bd31d5b62b28115e4b263f
[INFO] validating manifest of carllhw/tokio-hello-world on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of carllhw/tokio-hello-world on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing carllhw/tokio-hello-world
[INFO] finished frobbing carllhw/tokio-hello-world
[INFO] frobbed toml for carllhw/tokio-hello-world written to work/ex/beta-1.37-6/sources/1.36.0/gh/carllhw/tokio-hello-world/Cargo.toml
[INFO] started frobbing carllhw/tokio-hello-world
[INFO] finished frobbing carllhw/tokio-hello-world
[INFO] frobbed toml for carllhw/tokio-hello-world written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carllhw/tokio-hello-world/Cargo.toml
[INFO] crate carllhw/tokio-hello-world already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing carllhw/tokio-hello-world against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carllhw/tokio-hello-world:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 58281ab8bdb24767fe8f37561d3020ccee4810ffbaff51259df4f792cb8c7b92
[INFO] running `"docker" "start" "-a" "58281ab8bdb24767fe8f37561d3020ccee4810ffbaff51259df4f792cb8c7b92"`
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling tokio-executor v0.1.3
[INFO] [stderr]    Compiling tokio-io v0.1.7
[INFO] [stderr]    Compiling mio v0.6.15
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.3
[INFO] [stderr]    Compiling tokio-timer v0.2.5
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.5
[INFO] [stderr]    Compiling tokio-reactor v0.1.3
[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/crater/workdir)
[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]     Finished dev [unoptimized + debuginfo] target(s) in 11.27s
[INFO] running `"docker" "inspect" "58281ab8bdb24767fe8f37561d3020ccee4810ffbaff51259df4f792cb8c7b92"`
[INFO] running `"docker" "rm" "-f" "58281ab8bdb24767fe8f37561d3020ccee4810ffbaff51259df4f792cb8c7b92"`
[INFO] [stdout] 58281ab8bdb24767fe8f37561d3020ccee4810ffbaff51259df4f792cb8c7b92
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carllhw/tokio-hello-world:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] ed305dd8ba444ed51d0f814b6cf03bc1d093c49dcf6dfb1902e1c006a83c869a
[INFO] running `"docker" "start" "-a" "ed305dd8ba444ed51d0f814b6cf03bc1d093c49dcf6dfb1902e1c006a83c869a"`
[INFO] [stderr]    Compiling tokio-hello-world v0.1.0 (/opt/crater/workdir)
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "ed305dd8ba444ed51d0f814b6cf03bc1d093c49dcf6dfb1902e1c006a83c869a"`
[INFO] running `"docker" "rm" "-f" "ed305dd8ba444ed51d0f814b6cf03bc1d093c49dcf6dfb1902e1c006a83c869a"`
[INFO] [stdout] ed305dd8ba444ed51d0f814b6cf03bc1d093c49dcf6dfb1902e1c006a83c869a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/carllhw/tokio-hello-world:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 9dbfdc98b4272d07496fad018717f69ec7c41988f5c18b26459fcae9b845f49d
[INFO] running `"docker" "start" "-a" "9dbfdc98b4272d07496fad018717f69ec7c41988f5c18b26459fcae9b845f49d"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tokio_hello_world-6b3c3feb3b093485
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "9dbfdc98b4272d07496fad018717f69ec7c41988f5c18b26459fcae9b845f49d"`
[INFO] running `"docker" "rm" "-f" "9dbfdc98b4272d07496fad018717f69ec7c41988f5c18b26459fcae9b845f49d"`
[INFO] [stdout] 9dbfdc98b4272d07496fad018717f69ec7c41988f5c18b26459fcae9b845f49d