[INFO] fetching crate simple-uuid 0.5.1...
[INFO] documenting simple-uuid-0.5.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate simple-uuid 0.5.1 into /workspace/builds/worker-115/source
[INFO] validating manifest of crates.io crate simple-uuid 0.5.1 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 simple-uuid 0.5.1
[INFO] finished tweaking crates.io crate simple-uuid 0.5.1
[INFO] tweaked toml for crates.io crate simple-uuid 0.5.1 written to /workspace/builds/worker-115/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded md5 v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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] e0692bde50703cf37f15ca3685c9b71ffab73fa5aaa8125790181cc78e31c7cd
[INFO] running `Command { std: "docker" "start" "-a" "e0692bde50703cf37f15ca3685c9b71ffab73fa5aaa8125790181cc78e31c7cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0692bde50703cf37f15ca3685c9b71ffab73fa5aaa8125790181cc78e31c7cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0692bde50703cf37f15ca3685c9b71ffab73fa5aaa8125790181cc78e31c7cd", kill_on_drop: false }`
[INFO] [stdout] e0692bde50703cf37f15ca3685c9b71ffab73fa5aaa8125790181cc78e31c7cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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] c6ff866df57c8454eb6d8c64b60967c7f1d7e0984fbd1460c9b86f046a9b7e72
[INFO] running `Command { std: "docker" "start" "-a" "c6ff866df57c8454eb6d8c64b60967c7f1d7e0984fbd1460c9b86f046a9b7e72", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking nix v0.22.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking mac_address v1.1.2
[INFO] [stderr]  Documenting simple-uuid v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(doc_cfg)]
[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 `simple-uuid`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name simple_uuid src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="hash_md5"' --cfg 'feature="hash_sha1"' --cfg 'feature="mac_addr"' --cfg 'feature="mac_address"' --cfg 'feature="md5"' --cfg 'feature="rand_core"' --cfg 'feature="rand_num"' --cfg 'feature="sha1"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern mac_address=/opt/rustwide/target/debug/deps/libmac_address-e47c6f6ad461298d.rmeta --extern md5=/opt/rustwide/target/debug/deps/libmd5-2321b753da7dc695.rmeta --extern rand_core=/opt/rustwide/target/debug/deps/librand_core-9f7efcbc8337ae48.rmeta --extern sha1=/opt/rustwide/target/debug/deps/libsha1-9533537af209c6e2.rmeta --cap-lints=warn --crate-version 0.5.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c6ff866df57c8454eb6d8c64b60967c7f1d7e0984fbd1460c9b86f046a9b7e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6ff866df57c8454eb6d8c64b60967c7f1d7e0984fbd1460c9b86f046a9b7e72", kill_on_drop: false }`
[INFO] [stdout] c6ff866df57c8454eb6d8c64b60967c7f1d7e0984fbd1460c9b86f046a9b7e72
