[INFO] fetching crate uuid_v1_variant 0.1.4...
[INFO] documenting uuid_v1_variant-0.1.4 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate uuid_v1_variant 0.1.4 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate uuid_v1_variant 0.1.4 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 crates.io crate uuid_v1_variant 0.1.4
[INFO] finished tweaking crates.io crate uuid_v1_variant 0.1.4
[INFO] tweaked toml for crates.io crate uuid_v1_variant 0.1.4 written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] [stdout] f98b7390fa5fdb46e66ec91419dbc5515d36e5cbcbb7edf4532e3ffd8cdd5df1
[INFO] running `Command { std: "docker" "start" "-a" "f98b7390fa5fdb46e66ec91419dbc5515d36e5cbcbb7edf4532e3ffd8cdd5df1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f98b7390fa5fdb46e66ec91419dbc5515d36e5cbcbb7edf4532e3ffd8cdd5df1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f98b7390fa5fdb46e66ec91419dbc5515d36e5cbcbb7edf4532e3ffd8cdd5df1", kill_on_drop: false }`
[INFO] [stdout] f98b7390fa5fdb46e66ec91419dbc5515d36e5cbcbb7edf4532e3ffd8cdd5df1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] [stdout] dad117d58775f8bd7eadf1594d6521ed15a30720b8b66a89dcf9443ac236a458
[INFO] running `Command { std: "docker" "start" "-a" "dad117d58775f8bd7eadf1594d6521ed15a30720b8b66a89dcf9443ac236a458", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking eui48 v0.3.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]  Documenting uuid_v1_variant v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(libc)]
[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 `uuid_v1_variant`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type staticlib --crate-type lib --crate-name uuid_v1_variant src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=04967a50fb99e607 -L dependency=/opt/rustwide/target/debug/deps --extern eui48=/opt/rustwide/target/debug/deps/libeui48-f9c8f6a0eb864400.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-86d75e284ff39b5d.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-133015b43c1c35be.rmeta --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "dad117d58775f8bd7eadf1594d6521ed15a30720b8b66a89dcf9443ac236a458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dad117d58775f8bd7eadf1594d6521ed15a30720b8b66a89dcf9443ac236a458", kill_on_drop: false }`
[INFO] [stdout] dad117d58775f8bd7eadf1594d6521ed15a30720b8b66a89dcf9443ac236a458