[INFO] cloning repository https://github.com/nakakura/WebRTC-RecordServer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nakakura/WebRTC-RecordServer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnakakura%2FWebRTC-RecordServer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnakakura%2FWebRTC-RecordServer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 296309d11defbdcdcd13a28d40204e145118324c
[INFO] documenting nakakura/WebRTC-RecordServer against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnakakura%2FWebRTC-RecordServer" "/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/nakakura/WebRTC-RecordServer on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nakakura/WebRTC-RecordServer
[INFO] finished tweaking git repo https://github.com/nakakura/WebRTC-RecordServer
[INFO] tweaked toml for git repo https://github.com/nakakura/WebRTC-RecordServer written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/nakakura/WebRTC-RecordServer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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" "+beta-2022-05-20" "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] 3d007109dbc96b9513afe0ec258d83e2a375363a32a738fbdb0487a79da3d647
[INFO] running `Command { std: "docker" "start" "-a" "3d007109dbc96b9513afe0ec258d83e2a375363a32a738fbdb0487a79da3d647", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d007109dbc96b9513afe0ec258d83e2a375363a32a738fbdb0487a79da3d647", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d007109dbc96b9513afe0ec258d83e2a375363a32a738fbdb0487a79da3d647", kill_on_drop: false }`
[INFO] [stdout] 3d007109dbc96b9513afe0ec258d83e2a375363a32a738fbdb0487a79da3d647
[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" "+beta-2022-05-20" "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] 764f9b751b1d3affb7b39c9f1b73fafe757971b9c6ab1d78bed8a495a66a70e6
[INFO] running `Command { std: "docker" "start" "-a" "764f9b751b1d3affb7b39c9f1b73fafe757971b9c6ab1d78bed8a495a66a70e6", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking crossbeam-epoch v0.4.1
[INFO] [stderr]     Checking num-integer v0.1.38
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking mio v0.6.14
[INFO] [stderr]     Checking chrono v0.4.2
[INFO] [stderr]     Checking tokio-io v0.1.6
[INFO] [stderr]     Checking futures-fs v0.0.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.3
[INFO] [stderr]     Checking tokio-reactor v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.0
[INFO] [stderr]     Checking tokio-udp v0.1.0
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio v0.1.6
[INFO] [stderr]  Documenting udp_sendrecv_tokio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[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 `udp_sendrecv_tokio`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name udp_sendrecv_tokio src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=079fa739e756ce1f -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-1b7ef78620aceecd.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-b8c19d8ab8168d77.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c9e318bbb87d65e2.rmeta --extern futures_fs=/opt/rustwide/target/debug/deps/libfutures_fs-f80a3d7f10c7b916.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-f6c3255e5a0baed6.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-b3098fe7250a0c3f.rmeta --extern tokio_io=/opt/rustwide/target/debug/deps/libtokio_io-1be9a27577fd9379.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "764f9b751b1d3affb7b39c9f1b73fafe757971b9c6ab1d78bed8a495a66a70e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "764f9b751b1d3affb7b39c9f1b73fafe757971b9c6ab1d78bed8a495a66a70e6", kill_on_drop: false }`
[INFO] [stdout] 764f9b751b1d3affb7b39c9f1b73fafe757971b9c6ab1d78bed8a495a66a70e6