[INFO] fetching crate serialport 4.0.0...
[INFO] building serialport-4.0.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate serialport 4.0.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate serialport 4.0.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serialport 4.0.0
[INFO] finished tweaking crates.io crate serialport 4.0.0
[INFO] tweaked toml for crates.io crate serialport 4.0.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate serialport 4.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded CoreFoundation-sys v0.1.4
[INFO] [stderr]   Downloaded IOKit-sys v0.1.5
[INFO] [stderr]   Downloaded nix v0.16.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b5f203f312129d90c58fdeacc59ba0f95f1107d9d567e51f58c4c622f086bb1
[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" "2b5f203f312129d90c58fdeacc59ba0f95f1107d9d567e51f58c4c622f086bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b5f203f312129d90c58fdeacc59ba0f95f1107d9d567e51f58c4c622f086bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b5f203f312129d90c58fdeacc59ba0f95f1107d9d567e51f58c4c622f086bb1", kill_on_drop: false }`
[INFO] [stdout] 2b5f203f312129d90c58fdeacc59ba0f95f1107d9d567e51f58c4c622f086bb1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ddfa59cd7a49bc43219fd1fa5f060e50359ef623377a4eb1015c794b2ce67fa
[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" "1ddfa59cd7a49bc43219fd1fa5f060e50359ef623377a4eb1015c794b2ce67fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling libudev v0.2.0
[INFO] [stderr]    Compiling serialport v4.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.08s
[INFO] running `Command { std: "docker" "inspect" "1ddfa59cd7a49bc43219fd1fa5f060e50359ef623377a4eb1015c794b2ce67fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ddfa59cd7a49bc43219fd1fa5f060e50359ef623377a4eb1015c794b2ce67fa", kill_on_drop: false }`
[INFO] [stdout] 1ddfa59cd7a49bc43219fd1fa5f060e50359ef623377a4eb1015c794b2ce67fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77b6605871a863d2d59f93b8b4298e78db1f09b6be4d22059550c44d26b1a854
[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" "77b6605871a863d2d59f93b8b4298e78db1f09b6be4d22059550c44d26b1a854", kill_on_drop: false }`
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling serialport v4.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 15.59s
[INFO] running `Command { std: "docker" "inspect" "77b6605871a863d2d59f93b8b4298e78db1f09b6be4d22059550c44d26b1a854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b6605871a863d2d59f93b8b4298e78db1f09b6be4d22059550c44d26b1a854", kill_on_drop: false }`
[INFO] [stdout] 77b6605871a863d2d59f93b8b4298e78db1f09b6be4d22059550c44d26b1a854