[INFO] fetching crate blagger 0.3.0...
[INFO] documenting blagger-0.3.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate blagger 0.3.0 into /workspace/builds/worker-82/source
[INFO] validating manifest of crates.io crate blagger 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 blagger 0.3.0
[INFO] finished tweaking crates.io crate blagger 0.3.0
[INFO] tweaked toml for crates.io crate blagger 0.3.0 written to /workspace/builds/worker-82/source/Cargo.toml
[INFO] crate crates.io crate blagger 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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] [stdout] 09eb254ef038dce0ca5a133cba7f77d55fbd5dcfdc8a61f62a7d1d783f15769e
[INFO] running `Command { std: "docker" "start" "-a" "09eb254ef038dce0ca5a133cba7f77d55fbd5dcfdc8a61f62a7d1d783f15769e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09eb254ef038dce0ca5a133cba7f77d55fbd5dcfdc8a61f62a7d1d783f15769e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09eb254ef038dce0ca5a133cba7f77d55fbd5dcfdc8a61f62a7d1d783f15769e", kill_on_drop: false }`
[INFO] [stdout] 09eb254ef038dce0ca5a133cba7f77d55fbd5dcfdc8a61f62a7d1d783f15769e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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] [stdout] 908cbbe9f4eec2222b4879e6c03f1d43468f083f27cf40eaafd402686efa02e4
[INFO] running `Command { std: "docker" "start" "-a" "908cbbe9f4eec2222b4879e6c03f1d43468f083f27cf40eaafd402686efa02e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling encoding_rs v0.8.23
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling pulldown-cmark v0.7.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking quick-xml v0.17.2
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]    Compiling derive_builder_core v0.9.0
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking rss v1.9.0
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking tinytemplate v1.0.4
[INFO] [stderr]  Documenting blagger v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_split_once)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `blagger`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name blagger src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=9fb52813c3f85c3e -L dependency=/opt/rustwide/target/debug/deps --extern pulldown_cmark=/opt/rustwide/target/debug/deps/libpulldown_cmark-d0f551d87d1338ab.rmeta --extern rss=/opt/rustwide/target/debug/deps/librss-7b73a36bd682a8d5.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-d76c5612a5e9780b.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-ce82eda997bac433.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-8c0e2f31bf0ae829.rmeta --extern tinytemplate=/opt/rustwide/target/debug/deps/libtinytemplate-af20c143827f5e9e.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-876088a86cf78ed9.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "908cbbe9f4eec2222b4879e6c03f1d43468f083f27cf40eaafd402686efa02e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "908cbbe9f4eec2222b4879e6c03f1d43468f083f27cf40eaafd402686efa02e4", kill_on_drop: false }`
[INFO] [stdout] 908cbbe9f4eec2222b4879e6c03f1d43468f083f27cf40eaafd402686efa02e4