[INFO] fetching crate khalas 0.2.0...
[INFO] documenting khalas-0.2.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate khalas 0.2.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate khalas 0.2.0 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 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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 4e5826adad78fe9352f557328c23d30efda954501e82e5857bb7415084381430
[INFO] running `Command { std: "docker" "start" "-a" "4e5826adad78fe9352f557328c23d30efda954501e82e5857bb7415084381430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e5826adad78fe9352f557328c23d30efda954501e82e5857bb7415084381430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e5826adad78fe9352f557328c23d30efda954501e82e5857bb7415084381430", kill_on_drop: false }`
[INFO] [stdout] 4e5826adad78fe9352f557328c23d30efda954501e82e5857bb7415084381430
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 81a586a67d6026ca135586684518bf15d45c6c7faa2f5b673c0976db312a4a94
[INFO] running `Command { std: "docker" "start" "-a" "81a586a67d6026ca135586684518bf15d45c6c7faa2f5b673c0976db312a4a94", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.80
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bumpalo v3.9.1
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]    Compiling wasm-bindgen v0.2.80
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking unicode-bidi v0.3.8
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling pulldown-cmark v0.6.1
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking enclose v1.1.8
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling seed v0.6.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.80
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.80
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling derive_rich v0.2.2
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.80
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking js-sys v0.3.57
[INFO] [stderr]     Checking console_error_panic_hook v0.1.7
[INFO] [stderr]     Checking gloo-timers v0.2.4
[INFO] [stderr]     Checking web-sys v0.3.57
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.30
[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,artifacts,future-incompat --document-private-items -C metadata=41c9e45d09e91f79 -L dependency=/opt/rustwide/target/debug/deps --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-68d21d08071dacb9.so --extern derive_rich=/opt/rustwide/target/debug/deps/libderive_rich-046be366b8fa99db.so --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-421d56075a1d26a2.rmeta --extern palette=/opt/rustwide/target/debug/deps/libpalette-5fab24ead3dbf7f1.rmeta --extern seed=/opt/rustwide/target/debug/deps/libseed-b4800e1415fac435.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-cc22a93f7cbb0c30.rmeta --extern web_sys=/opt/rustwide/target/debug/deps/libweb_sys-ff70a43d6057dc0c.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "81a586a67d6026ca135586684518bf15d45c6c7faa2f5b673c0976db312a4a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81a586a67d6026ca135586684518bf15d45c6c7faa2f5b673c0976db312a4a94", kill_on_drop: false }`
[INFO] [stdout] 81a586a67d6026ca135586684518bf15d45c6c7faa2f5b673c0976db312a4a94