[INFO] cloning repository https://github.com/mycognosist/mbus_write
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mycognosist/mbus_write" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmycognosist%2Fmbus_write", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmycognosist%2Fmbus_write'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 92f02d493ec15f7fa51cc921feba6d59bfc3545b
[INFO] testing mycognosist/mbus_write against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmycognosist%2Fmbus_write" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mycognosist/mbus_write 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/mycognosist/mbus_write
[INFO] finished tweaking git repo https://github.com/mycognosist/mbus_write
[INFO] tweaked toml for git repo https://github.com/mycognosist/mbus_write written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/mycognosist/mbus_write 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]  Downloading crates ...
[INFO] [stderr]   Downloaded miow v0.3.1
[INFO] [stderr]   Downloaded serialport v2.3.0
[INFO] [stderr]   Downloaded winreg v0.4.0
[INFO] [stderr]   Downloaded mio-serial v0.8.0
[INFO] [stderr]   Downloaded tokio-serial v0.8.0
[INFO] [stderr]   Downloaded tokio-serial v0.6.0
[INFO] [stderr]   Downloaded ktmw32-sys v0.1.1
[INFO] [stderr]   Downloaded tokio-modbus v0.2.1
[INFO] [stderr]   Downloaded serialport v1.0.1
[INFO] [stderr]   Downloaded mio-serial v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 169dbc49353b11b8a397c9daa6182c4a04f8feec4a69fbf12900f04cdbb880f0
[INFO] running `Command { std: "docker" "start" "-a" "169dbc49353b11b8a397c9daa6182c4a04f8feec4a69fbf12900f04cdbb880f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "169dbc49353b11b8a397c9daa6182c4a04f8feec4a69fbf12900f04cdbb880f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "169dbc49353b11b8a397c9daa6182c4a04f8feec4a69fbf12900f04cdbb880f0", kill_on_drop: false }`
[INFO] [stdout] 169dbc49353b11b8a397c9daa6182c4a04f8feec4a69fbf12900f04cdbb880f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 7d869a20c9d3dd82e10b6a8e9aa384265b146baa35081e0b934389485d2d2cfd
[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" "7d869a20c9d3dd82e10b6a8e9aa384265b146baa35081e0b934389485d2d2cfd", kill_on_drop: false }`
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling termios v0.2.2
[INFO] [stderr]    Compiling ioctl-rs v0.1.6
[INFO] [stderr]    Compiling atty v0.2.10
[INFO] [stderr]    Compiling log v0.4.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling tokio-timer v0.2.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.3
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling bytes v0.4.8
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling tokio-io v0.1.7
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.4
[INFO] [stderr]    Compiling libudev v0.2.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.2
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling serialport v1.0.1
[INFO] [stderr]    Compiling tokio-fs v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.1
[INFO] [stderr]    Compiling mio-serial v0.6.0
[INFO] [stderr]    Compiling tokio v0.1.7
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-serial v0.6.0
[INFO] [stderr]    Compiling serialport v2.3.0
[INFO] [stderr]    Compiling tokio-modbus v0.2.1
[INFO] [stderr]    Compiling mio-serial v0.8.0
[INFO] [stderr]    Compiling tokio-serial v0.8.0
[INFO] [stderr]    Compiling mbus_write v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:76:36
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let task = Client::connect_rtu(port, modbus_addr, &handle).and_then(|client| {
[INFO] [stdout]    |                                    ^^^^ expected struct `tokio_serial::unix::Serial`, found struct `tokio_serial::Serial`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mbus_write` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7d869a20c9d3dd82e10b6a8e9aa384265b146baa35081e0b934389485d2d2cfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d869a20c9d3dd82e10b6a8e9aa384265b146baa35081e0b934389485d2d2cfd", kill_on_drop: false }`
[INFO] [stdout] 7d869a20c9d3dd82e10b6a8e9aa384265b146baa35081e0b934389485d2d2cfd