[INFO] cloning repository https://github.com/gelfand/lockfree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gelfand/lockfree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgelfand%2Flockfree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgelfand%2Flockfree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1344256a9f29549fdf6f32594a983ffbd3eebe1b
[INFO] documenting gelfand/lockfree 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%2Fgelfand%2Flockfree" "/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/gelfand/lockfree 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/gelfand/lockfree
[INFO] finished tweaking git repo https://github.com/gelfand/lockfree
[INFO] tweaked toml for git repo https://github.com/gelfand/lockfree written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/gelfand/lockfree 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/crossbeam-rs/crossbeam`
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc8e80c6bfa38fba1060a15ff95cf8c5f2ad63195c07cce47a77855432098891
[INFO] running `Command { std: "docker" "start" "-a" "cc8e80c6bfa38fba1060a15ff95cf8c5f2ad63195c07cce47a77855432098891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc8e80c6bfa38fba1060a15ff95cf8c5f2ad63195c07cce47a77855432098891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc8e80c6bfa38fba1060a15ff95cf8c5f2ad63195c07cce47a77855432098891", kill_on_drop: false }`
[INFO] [stdout] cc8e80c6bfa38fba1060a15ff95cf8c5f2ad63195c07cce47a77855432098891
[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" "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] [stdout] e186bb4023afd1e3db00fa25c484712637636134cb320cf325aa48fdb1688585
[INFO] running `Command { std: "docker" "start" "-a" "e186bb4023afd1e3db00fa25c484712637636134cb320cf325aa48fdb1688585", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8 (https://github.com/crossbeam-rs/crossbeam#df9b0c90)
[INFO] [stderr]    Compiling crossbeam-queue v0.3.5 (https://github.com/crossbeam-rs/crossbeam#df9b0c90)
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8 (https://github.com/crossbeam-rs/crossbeam#df9b0c90)
[INFO] [stderr]     Checking crossbeam-channel v0.5.4 (https://github.com/crossbeam-rs/crossbeam#df9b0c90)
[INFO] [stderr]     Checking crossbeam-deque v0.8.1 (https://github.com/crossbeam-rs/crossbeam#df9b0c90)
[INFO] [stderr]     Checking crossbeam v0.8.1 (https://github.com/crossbeam-rs/crossbeam#df9b0c90)
[INFO] [stderr]  Documenting lockfreed v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(feature = "nightly", feature(const_trait_impl, const_default_impls))]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `lockfreed`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name lockfreed src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="nightly"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=65d8ec6d05af20c6 -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-eb0cb1f89200acb4.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e186bb4023afd1e3db00fa25c484712637636134cb320cf325aa48fdb1688585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e186bb4023afd1e3db00fa25c484712637636134cb320cf325aa48fdb1688585", kill_on_drop: false }`
[INFO] [stdout] e186bb4023afd1e3db00fa25c484712637636134cb320cf325aa48fdb1688585