[INFO] fetching crate khalas 0.2.0...
[INFO] documenting khalas-0.2.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate khalas 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate khalas 0.2.0 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 khalas 0.2.0
[INFO] finished tweaking crates.io crate khalas 0.2.0
[INFO] tweaked toml for crates.io crate khalas 0.2.0 written to /workspace/builds/worker-8/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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded palette_derive v0.4.1
[INFO] [stderr]   Downloaded palette v0.4.1
[INFO] [stderr]   Downloaded seed v0.6.0
[INFO] [stderr]   Downloaded derive_rich v0.2.2
[INFO] [stderr]   Downloaded enclose v1.1.8
[INFO] [stderr]   Downloaded dbg v1.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] f5a5f156047d44372af8bf0d682b3d66ef2a8864652bfc4cd113c38e6f270214
[INFO] running `Command { std: "docker" "start" "-a" "f5a5f156047d44372af8bf0d682b3d66ef2a8864652bfc4cd113c38e6f270214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5a5f156047d44372af8bf0d682b3d66ef2a8864652bfc4cd113c38e6f270214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5a5f156047d44372af8bf0d682b3d66ef2a8864652bfc4cd113c38e6f270214", kill_on_drop: false }`
[INFO] [stdout] f5a5f156047d44372af8bf0d682b3d66ef2a8864652bfc4cd113c38e6f270214
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 2b54a7db1cb3c1d773249cf2342f29af551909dfdee21dd006dbca8c301ea621
[INFO] running `Command { std: "docker" "start" "-a" "2b54a7db1cb3c1d773249cf2342f29af551909dfdee21dd006dbca8c301ea621", 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]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling wasm-bindgen v0.2.75
[INFO] [stderr]    Compiling pulldown-cmark v0.6.1
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking enclose v1.1.8
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling seed v0.6.0
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.75
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.75
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling derive_rich v0.2.2
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.75
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking serde v1.0.127
[INFO] [stderr]     Checking serde_json v1.0.66
[INFO] [stderr]     Checking js-sys v0.3.52
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking web-sys v0.3.52
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.25
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]  Documenting khalas v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(bool_to_option)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `khalas`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name khalas src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-b27743f99fd2d11d.so --extern derive_rich=/opt/rustwide/target/debug/deps/libderive_rich-418b4b936252d781.so --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-bb2d0fec3a2425f4.rmeta --extern palette=/opt/rustwide/target/debug/deps/libpalette-6ca8fcce55088e00.rmeta --extern seed=/opt/rustwide/target/debug/deps/libseed-f368294455fd8817.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-123b2b1bc183b278.rmeta --extern web_sys=/opt/rustwide/target/debug/deps/libweb_sys-b9d4eaa8122af66e.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2b54a7db1cb3c1d773249cf2342f29af551909dfdee21dd006dbca8c301ea621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b54a7db1cb3c1d773249cf2342f29af551909dfdee21dd006dbca8c301ea621", kill_on_drop: false }`
[INFO] [stdout] 2b54a7db1cb3c1d773249cf2342f29af551909dfdee21dd006dbca8c301ea621
