[INFO] fetching crate lighthouse 0.2.1...
[INFO] checking lighthouse-0.2.1 against beta for pr-78714
[INFO] extracting crate lighthouse 0.2.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate lighthouse 0.2.1 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 lighthouse 0.2.1
[INFO] finished tweaking crates.io crate lighthouse 0.2.1
[INFO] tweaked toml for crates.io crate lighthouse 0.2.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate lighthouse 0.2.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fe43a1b6b8981c526b24e8105848ec4dee5d4985012314b00cd1fa6dfc849226
[INFO] running `Command { std: "docker" "start" "-a" "fe43a1b6b8981c526b24e8105848ec4dee5d4985012314b00cd1fa6dfc849226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe43a1b6b8981c526b24e8105848ec4dee5d4985012314b00cd1fa6dfc849226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe43a1b6b8981c526b24e8105848ec4dee5d4985012314b00cd1fa6dfc849226", kill_on_drop: false }`
[INFO] [stdout] fe43a1b6b8981c526b24e8105848ec4dee5d4985012314b00cd1fa6dfc849226
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 5505e4a88ab30f3a1699f9036b4dd3e8d88202489f300d7488404e5b0ee3a2cf
[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" "5505e4a88ab30f3a1699f9036b4dd3e8d88202489f300d7488404e5b0ee3a2cf", kill_on_drop: false }`
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking get_if_addrs v0.5.3
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking ssdp v0.7.0
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ssdp-0.7.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(ip)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ssdp`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5505e4a88ab30f3a1699f9036b4dd3e8d88202489f300d7488404e5b0ee3a2cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5505e4a88ab30f3a1699f9036b4dd3e8d88202489f300d7488404e5b0ee3a2cf", kill_on_drop: false }`
[INFO] [stdout] 5505e4a88ab30f3a1699f9036b4dd3e8d88202489f300d7488404e5b0ee3a2cf