[INFO] fetching crate brewmaster 0.1.0...
[INFO] documenting brewmaster-0.1.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate brewmaster 0.1.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate brewmaster 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate brewmaster 0.1.0
[INFO] finished tweaking crates.io crate brewmaster 0.1.0
[INFO] tweaked toml for crates.io crate brewmaster 0.1.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate brewmaster 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6a22ea098de033b65b1efe2472b31307f0e668397bb934ae8c2f2b2c4c9c162
[INFO] running `Command { std: "docker" "start" "-a" "e6a22ea098de033b65b1efe2472b31307f0e668397bb934ae8c2f2b2c4c9c162", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6a22ea098de033b65b1efe2472b31307f0e668397bb934ae8c2f2b2c4c9c162", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a22ea098de033b65b1efe2472b31307f0e668397bb934ae8c2f2b2c4c9c162", kill_on_drop: false }`
[INFO] [stdout] e6a22ea098de033b65b1efe2472b31307f0e668397bb934ae8c2f2b2c4c9c162
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec1f2f425e94a19307c8ffacb8000f2f345087540c53b27238a0ad98ec5f7abb
[INFO] running `Command { std: "docker" "start" "-a" "ec1f2f425e94a19307c8ffacb8000f2f345087540c53b27238a0ad98ec5f7abb", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking dtoa v0.4.7
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking tinyvec v1.1.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking tar v0.4.32
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking idna v0.2.1
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling libssh2-sys v0.2.21
[INFO] [stderr]    Compiling libgit2-sys v0.12.18+1.1.0
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking globset v0.4.6
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking ignore v0.4.17
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking globwalk v0.3.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking clap-verbosity-flag v0.2.0
[INFO] [stderr]     Checking exitfailure v0.5.1
[INFO] [stderr]     Checking git2 v0.13.17
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]     Checking quicli v0.4.0
[INFO] [stderr]     Checking semver v0.10.0
[INFO] [stderr]  Documenting brewmaster v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_split_as_str)]
[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 `brewmaster`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name brewmaster src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern flate2=/opt/rustwide/target/debug/deps/libflate2-75cd90a3e8792f2b.rmeta --extern git2=/opt/rustwide/target/debug/deps/libgit2-020a6de3c1609382.rmeta --extern quicli=/opt/rustwide/target/debug/deps/libquicli-7bba2b03e88de4b3.rmeta --extern semver=/opt/rustwide/target/debug/deps/libsemver-f78088e5aef36a6b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-ca8cfba374a7c843.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-c0af3693f1b5488e.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-7a09db7392fff7b8.rmeta --extern tar=/opt/rustwide/target/debug/deps/libtar-84a163d1a8b9b40a.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-e5f84ac196f1f4bf.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ec1f2f425e94a19307c8ffacb8000f2f345087540c53b27238a0ad98ec5f7abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec1f2f425e94a19307c8ffacb8000f2f345087540c53b27238a0ad98ec5f7abb", kill_on_drop: false }`
[INFO] [stdout] ec1f2f425e94a19307c8ffacb8000f2f345087540c53b27238a0ad98ec5f7abb
