[INFO] fetching crate vedirect 0.1.0...
[INFO] checking vedirect-0.1.0 against try#9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c for pr-79472
[INFO] extracting crate vedirect 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate vedirect 0.1.0 on toolchain 9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vedirect 0.1.0
[INFO] finished tweaking crates.io crate vedirect 0.1.0
[INFO] tweaked toml for crates.io crate vedirect 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate vedirect 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.9
[INFO] [stderr]   Downloaded static_assertions v0.3.4
[INFO] [stderr]   Downloaded thiserror v1.0.11
[INFO] [stderr]   Downloaded nom v5.1.1
[INFO] [stderr]   Downloaded lexical-core v0.6.7
[INFO] [stderr]   Downloaded libc v0.2.68
[INFO] [stderr]   Downloaded serial-windows v0.4.0
[INFO] [stderr]   Downloaded nodrop v0.1.14
[INFO] [stderr]   Downloaded arrayvec v0.4.12
[INFO] [stderr]   Downloaded serial v0.4.0
[INFO] [stderr]   Downloaded anyhow v1.0.27
[INFO] [stderr]   Downloaded thiserror-impl v1.0.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "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] 0c51e5388f30c96e2a1b8f5911a2289b89782265d9984b991bcdbb8d5ce63623
[INFO] running `Command { std: "docker" "start" "-a" "0c51e5388f30c96e2a1b8f5911a2289b89782265d9984b991bcdbb8d5ce63623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c51e5388f30c96e2a1b8f5911a2289b89782265d9984b991bcdbb8d5ce63623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c51e5388f30c96e2a1b8f5911a2289b89782265d9984b991bcdbb8d5ce63623", kill_on_drop: false }`
[INFO] [stdout] 0c51e5388f30c96e2a1b8f5911a2289b89782265d9984b991bcdbb8d5ce63623
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 7e34d6f0a6db3bb4a6b1d0cb89a9e2071f4aa7e2c0e39dc94d3bff0c514cb829
[INFO] running `Command { std: "docker" "start" "-a" "7e34d6f0a6db3bb4a6b1d0cb89a9e2071f4aa7e2c0e39dc94d3bff0c514cb829", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]    Compiling anyhow v1.0.27
[INFO] [stderr]    Compiling lexical-core v0.6.7
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.11
[INFO] [stderr]     Checking thiserror v1.0.11
[INFO] [stderr]     Checking vedirect v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> examples/read_serial.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let r = port.read(&mut buf)?;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 24.28s
[INFO] running `Command { std: "docker" "inspect" "7e34d6f0a6db3bb4a6b1d0cb89a9e2071f4aa7e2c0e39dc94d3bff0c514cb829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e34d6f0a6db3bb4a6b1d0cb89a9e2071f4aa7e2c0e39dc94d3bff0c514cb829", kill_on_drop: false }`
[INFO] [stdout] 7e34d6f0a6db3bb4a6b1d0cb89a9e2071f4aa7e2c0e39dc94d3bff0c514cb829