[INFO] fetching crate mio-serial 3.3.1...
[INFO] checking mio-serial-3.3.1 against beta for pr-78714
[INFO] extracting crate mio-serial 3.3.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mio-serial 3.3.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mio-serial 3.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mio-serial 3.3.1
[INFO] tweaked toml for crates.io crate mio-serial 3.3.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate mio-serial 3.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5af8d4e99bfd4cf621e800d9fa919b86e1b386be33729cab00b04b07197d816
[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" "d5af8d4e99bfd4cf621e800d9fa919b86e1b386be33729cab00b04b07197d816", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5af8d4e99bfd4cf621e800d9fa919b86e1b386be33729cab00b04b07197d816", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5af8d4e99bfd4cf621e800d9fa919b86e1b386be33729cab00b04b07197d816", kill_on_drop: false }`
[INFO] [stdout] d5af8d4e99bfd4cf621e800d9fa919b86e1b386be33729cab00b04b07197d816
[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=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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0961bf78acffedb840fcf9e456df081130e2055edf78230751756bd1aa35b9c5
[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" "0961bf78acffedb840fcf9e456df081130e2055edf78230751756bd1aa35b9c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]     Checking libudev-sys v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking serialport v3.3.0
[INFO] [stderr]     Checking mio-serial v3.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.26s
[INFO] running `Command { std: "docker" "inspect" "0961bf78acffedb840fcf9e456df081130e2055edf78230751756bd1aa35b9c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0961bf78acffedb840fcf9e456df081130e2055edf78230751756bd1aa35b9c5", kill_on_drop: false }`
[INFO] [stdout] 0961bf78acffedb840fcf9e456df081130e2055edf78230751756bd1aa35b9c5