[INFO] fetching crate config-loader 2.2.3...
[INFO] documenting config-loader-2.2.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate config-loader 2.2.3 into /workspace/builds/worker-107/source
[INFO] validating manifest of crates.io crate config-loader 2.2.3 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 config-loader 2.2.3
[INFO] finished tweaking crates.io crate config-loader 2.2.3
[INFO] tweaked toml for crates.io crate config-loader 2.2.3 written to /workspace/builds/worker-107/source/Cargo.toml
[INFO] crate crates.io crate config-loader 2.2.3 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]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v3.0.0-rc.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] 20238d554e8649eabaac2d7d4b549b8a1f9b6cfb0d2c511ec5453566410e0e6a
[INFO] running `Command { std: "docker" "start" "-a" "20238d554e8649eabaac2d7d4b549b8a1f9b6cfb0d2c511ec5453566410e0e6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20238d554e8649eabaac2d7d4b549b8a1f9b6cfb0d2c511ec5453566410e0e6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20238d554e8649eabaac2d7d4b549b8a1f9b6cfb0d2c511ec5453566410e0e6a", kill_on_drop: false }`
[INFO] [stdout] 20238d554e8649eabaac2d7d4b549b8a1f9b6cfb0d2c511ec5453566410e0e6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] bac26d9770987e480f44eafd77cbd988ea444e161944a38bbfe4846a3807cf3a
[INFO] running `Command { std: "docker" "start" "-a" "bac26d9770987e480f44eafd77cbd988ea444e161944a38bbfe4846a3807cf3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde_derive v1.0.131
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling serde v1.0.131
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.0.0-rc.5
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]  Documenting config-loader v2.2.3 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `config-loader`
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | #![feature(int_log)]
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name config_loader src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bfab197400263b8b -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-2b51f40009cfbc32.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-f2b2621df1e6694f.rmeta --extern home=/opt/rustwide/target/debug/deps/libhome-a10293341ae37dcd.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a535053ecdb99459.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-56571b4c3d3a7171.rmeta --extern yansi=/opt/rustwide/target/debug/deps/libyansi-a37a70c07e6f9f7a.rmeta --cap-lints=warn --crate-version 2.2.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "bac26d9770987e480f44eafd77cbd988ea444e161944a38bbfe4846a3807cf3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bac26d9770987e480f44eafd77cbd988ea444e161944a38bbfe4846a3807cf3a", kill_on_drop: false }`
[INFO] [stdout] bac26d9770987e480f44eafd77cbd988ea444e161944a38bbfe4846a3807cf3a