[INFO] fetching crate lun 0.0.1...
[INFO] documenting lun-0.0.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate lun 0.0.1 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate lun 0.0.1 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 crates.io crate lun 0.0.1
[INFO] finished tweaking crates.io crate lun 0.0.1
[INFO] tweaked toml for crates.io crate lun 0.0.1 written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate crates.io crate lun 0.0.1 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] 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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8cb30f6dd74a4d97e77cffc861800d2954572c4636dc5e14a2e6aeb979a3c84d
[INFO] running `Command { std: "docker" "start" "-a" "8cb30f6dd74a4d97e77cffc861800d2954572c4636dc5e14a2e6aeb979a3c84d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cb30f6dd74a4d97e77cffc861800d2954572c4636dc5e14a2e6aeb979a3c84d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cb30f6dd74a4d97e77cffc861800d2954572c4636dc5e14a2e6aeb979a3c84d", kill_on_drop: false }`
[INFO] [stdout] 8cb30f6dd74a4d97e77cffc861800d2954572c4636dc5e14a2e6aeb979a3c84d
[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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76295cd1573a88a62473222890a8fe447d19c8f029fd7ee3153505e7570c1a2d
[INFO] running `Command { std: "docker" "start" "-a" "76295cd1573a88a62473222890a8fe447d19c8f029fd7ee3153505e7570c1a2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.6
[INFO] [stderr]     Checking num_enum v0.5.6
[INFO] [stderr]  Documenting lun v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(mixed_integer_ops)]
[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 `lun`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name lun src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2e7e725db6401345 -L dependency=/opt/rustwide/target/debug/deps --extern num_enum=/opt/rustwide/target/debug/deps/libnum_enum-2cee4a2de77fba25.rmeta --cap-lints=warn --crate-version 0.0.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "76295cd1573a88a62473222890a8fe447d19c8f029fd7ee3153505e7570c1a2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76295cd1573a88a62473222890a8fe447d19c8f029fd7ee3153505e7570c1a2d", kill_on_drop: false }`
[INFO] [stdout] 76295cd1573a88a62473222890a8fe447d19c8f029fd7ee3153505e7570c1a2d