[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] 139dc90805d50b311633dcc8d5ee8c0151ed58c2
[INFO] documenting tripplet/monitor-ipv6 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftripplet%2Fmonitor-ipv6" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tripplet/monitor-ipv6 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-4/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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b776df6c804c2d672388e37899f5c76d998d101adc4818696dd4a2a24b84ac08
[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" "b776df6c804c2d672388e37899f5c76d998d101adc4818696dd4a2a24b84ac08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b776df6c804c2d672388e37899f5c76d998d101adc4818696dd4a2a24b84ac08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b776df6c804c2d672388e37899f5c76d998d101adc4818696dd4a2a24b84ac08", kill_on_drop: false }`
[INFO] [stdout] b776df6c804c2d672388e37899f5c76d998d101adc4818696dd4a2a24b84ac08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] cfcac00caea221ef55f622eb644abc712a66c0f634527ce50fce2076d9de2286
[INFO] running `Command { std: "docker" "start" "-a" "cfcac00caea221ef55f622eb644abc712a66c0f634527ce50fce2076d9de2286", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling time-macros v0.2.4
[INFO] [stderr]     Checking num_threads v0.1.5
[INFO] [stderr]     Checking c_linked_list v1.1.1
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling libdbus-sys v0.2.2
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking get_if_addrs v0.5.3
[INFO] [stderr]     Checking clap_lex v0.1.1
[INFO] [stderr]     Checking dbus v0.9.5
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking time v0.3.9
[INFO] [stderr]     Checking simple_logger v1.16.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.7
[INFO] [stderr]     Checking clap v3.1.12
[INFO] [stderr]  Documenting monitor-ipv6 v1.2.0 (/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 document `monitor-ipv6`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name monitor_ipv6 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=14ca77fd57b66e10 -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-7d0fcd77d10da4c5.rmeta --extern dbus=/opt/rustwide/target/debug/deps/libdbus-d733a0d042fce53d.rmeta --extern get_if_addrs=/opt/rustwide/target/debug/deps/libget_if_addrs-39c81d645949b0fc.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-92115a31ee9ca72b.rmeta --extern simple_logger=/opt/rustwide/target/debug/deps/libsimple_logger-f39a1b04464bf3b1.rmeta --cap-lints=warn --crate-version 1.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cfcac00caea221ef55f622eb644abc712a66c0f634527ce50fce2076d9de2286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfcac00caea221ef55f622eb644abc712a66c0f634527ce50fce2076d9de2286", kill_on_drop: false }`
[INFO] [stdout] cfcac00caea221ef55f622eb644abc712a66c0f634527ce50fce2076d9de2286