[INFO] cloning repository https://github.com/tripplet/monitor-ipv6
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tripplet/monitor-ipv6" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftripplet%2Fmonitor-ipv6", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftripplet%2Fmonitor-ipv6'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20471673ddbe738c3d7ad6de207c7b0096b1afab
[INFO] testing tripplet/monitor-ipv6 against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftripplet%2Fmonitor-ipv6" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tripplet/monitor-ipv6 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tripplet/monitor-ipv6
[INFO] finished tweaking git repo https://github.com/tripplet/monitor-ipv6
[INFO] tweaked toml for git repo https://github.com/tripplet/monitor-ipv6 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/tripplet/monitor-ipv6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] 412be13541c9d78fe968bb692d66761d928d4ea4297f917f069d3ddcb4af4338
[INFO] running `Command { std: "docker" "start" "-a" "412be13541c9d78fe968bb692d66761d928d4ea4297f917f069d3ddcb4af4338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "412be13541c9d78fe968bb692d66761d928d4ea4297f917f069d3ddcb4af4338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "412be13541c9d78fe968bb692d66761d928d4ea4297f917f069d3ddcb4af4338", kill_on_drop: false }`
[INFO] [stdout] 412be13541c9d78fe968bb692d66761d928d4ea4297f917f069d3ddcb4af4338
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d32075961da2015e3cb0d6decbc45616206ded6d250c5c5dc9b50567df46cf61
[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" "d32075961da2015e3cb0d6decbc45616206ded6d250c5c5dc9b50567df46cf61", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling time-macros v0.2.3
[INFO] [stderr]    Compiling c_linked_list v1.1.1
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling get_if_addrs v0.5.3
[INFO] [stderr]    Compiling time v0.3.5
[INFO] [stderr]    Compiling simple_logger v1.16.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.6
[INFO] [stderr]    Compiling clap v3.0.7
[INFO] [stderr]    Compiling monitor-ipv6 v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `monitor-ipv6` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d32075961da2015e3cb0d6decbc45616206ded6d250c5c5dc9b50567df46cf61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d32075961da2015e3cb0d6decbc45616206ded6d250c5c5dc9b50567df46cf61", kill_on_drop: false }`
[INFO] [stdout] d32075961da2015e3cb0d6decbc45616206ded6d250c5c5dc9b50567df46cf61