[INFO] fetching crate con-art-rust 0.2.0...
[INFO] documenting con-art-rust-0.2.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate con-art-rust 0.2.0 into /workspace/builds/worker-99/source
[INFO] validating manifest of crates.io crate con-art-rust 0.2.0 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 con-art-rust 0.2.0
[INFO] finished tweaking crates.io crate con-art-rust 0.2.0
[INFO] tweaked toml for crates.io crate con-art-rust 0.2.0 written to /workspace/builds/worker-99/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pprof v0.6.1
[INFO] [stderr]   Downloaded shuttle v0.0.7
[INFO] [stderr]   Downloaded shumai v0.1.17
[INFO] [stderr]   Downloaded shumai-config-impl v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/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] 3dc26e6d7d3ba6469be8f2701bf27c32b5b91872f0729539c030d65e60747abb
[INFO] running `Command { std: "docker" "start" "-a" "3dc26e6d7d3ba6469be8f2701bf27c32b5b91872f0729539c030d65e60747abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dc26e6d7d3ba6469be8f2701bf27c32b5b91872f0729539c030d65e60747abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dc26e6d7d3ba6469be8f2701bf27c32b5b91872f0729539c030d65e60747abb", kill_on_drop: false }`
[INFO] [stdout] 3dc26e6d7d3ba6469be8f2701bf27c32b5b91872f0729539c030d65e60747abb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/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] 9b0f462c7a4ca081921ec94b03b606690665eec4c9a1ed916f264082f9925a4c
[INFO] running `Command { std: "docker" "start" "-a" "9b0f462c7a4ca081921ec94b03b606690665eec4c9a1ed916f264082f9925a4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]  Documenting con-art-rust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | #![feature(core_intrinsics)]
[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 `con-art-rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name con_art_rust src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2d0734aeb20cb878 -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_epoch=/opt/rustwide/target/debug/deps/libcrossbeam_epoch-22106d8ea1772496.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9b0f462c7a4ca081921ec94b03b606690665eec4c9a1ed916f264082f9925a4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b0f462c7a4ca081921ec94b03b606690665eec4c9a1ed916f264082f9925a4c", kill_on_drop: false }`
[INFO] [stdout] 9b0f462c7a4ca081921ec94b03b606690665eec4c9a1ed916f264082f9925a4c