[INFO] fetching crate newhope 0.3.0...
[INFO] documenting newhope-0.3.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate newhope 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate newhope 0.3.0 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 newhope 0.3.0
[INFO] finished tweaking crates.io crate newhope 0.3.0
[INFO] tweaked toml for crates.io crate newhope 0.3.0 written to /workspace/builds/worker-7/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] [stderr]     Blocking waiting for file lock on package cache
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] c505e837ce1978fb1e7afb1ca431e963537885e35891383d60f1a3262a38d00a
[INFO] running `Command { std: "docker" "start" "-a" "c505e837ce1978fb1e7afb1ca431e963537885e35891383d60f1a3262a38d00a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c505e837ce1978fb1e7afb1ca431e963537885e35891383d60f1a3262a38d00a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c505e837ce1978fb1e7afb1ca431e963537885e35891383d60f1a3262a38d00a", kill_on_drop: false }`
[INFO] [stdout] c505e837ce1978fb1e7afb1ca431e963537885e35891383d60f1a3262a38d00a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 45a8270e918de1e931576fdd3f506b328a053c522ff24a65e6430deec96fe99d
[INFO] running `Command { std: "docker" "start" "-a" "45a8270e918de1e931576fdd3f506b328a053c522ff24a65e6430deec96fe99d", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]  Documenting newhope v0.3.0 (/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(iterator_step_by)]
[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 `newhope`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name newhope src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9c17225b043894df -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-21d0a7105b7fc30b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-5ae654ca6f8db27a.rmeta --extern tiny_keccak=/opt/rustwide/target/debug/deps/libtiny_keccak-f27ea4491b91cd6f.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "45a8270e918de1e931576fdd3f506b328a053c522ff24a65e6430deec96fe99d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45a8270e918de1e931576fdd3f506b328a053c522ff24a65e6430deec96fe99d", kill_on_drop: false }`
[INFO] [stdout] 45a8270e918de1e931576fdd3f506b328a053c522ff24a65e6430deec96fe99d